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- r OMNR-OGS 1979 . r Ministry of Ministry of Natural Northern Resources Affairs Ontario Hon. James A.C. Auld Hon. Leo Bernier Minister Dr. J. K. Reynolds Art Herridge . r Deputy Minister Deputy Minister . r
n ONTARIO GEOLOGICAL SURVEY Open File Report 5279 Geology of the BURNTBUSH - DETOUR LAKES AREA District of Cochrane by G.W. Johns 1979
This project is part of the Northern Ontario Geological Survey program and is funded by the Ontario Ministry of Northern Affairs
Parts of this publication may be quoted if credit is given. It is recommended that reference to this report be made in the following form: Johns, G.W. 1979: Geology of the Burntbush - Detour Lakes Area, District of Cochrane; Ontario Geological Survey, Open File Report 5279,122 p. Accompanied by 3 maps, scale 1i5oooo E t L t Ontario Geological Survey
Open file reports are made available to the public subject to the following conditions:
This report is unedited. Discrepancies may occur for which the Ontario Geological Survey does not assume liability. Recommendations and statements of opinion expressed are those of the author or authors and are not to be construed as statements of government policy.
Open file copies may be read at the following locations:
Mines Library Ontario Ministy of Natural Resources 8th Floor, 77 Grenville Street, Toronto
The office of the Regional or Resident Geologist in whose district the area covered by this report is located.
Handwritten notes and sketches may be made from this report. Check with the Library or Region al or Resident Geologist©s office as to whether there is a copy of this report that may be borrowed. The Library or Regional or Resident Geologist©s office will also give you information on copying ar rangements. A copy of this report is available for Inter-Library Loan.
This report is on file in the Regional or Resident Geologists© office(s) located at: 60 Wilson Ave. 4 Government Ret. b Timmins, Ontario Kirkland Lake, Ontario P4N 3W2 P2N 1A2
The right to reproduce this report is reserved by the Ontario Ministry of Natural Resources. Permission for other reproductions must be obtained in writing from the Director, Ontario Geological Survey.
E.G. Pye, Director Ontario Geological Survey f l
Table of Contents
Abstract © Introduction 5 Location 3 Access t - r Natural Resources f Topography and Drainage ^ Previous Geological Investigations 7 - r, Present Geological Survey 7 Acknowledgements 4 Prospecting and Mining Activity J/ -p General Geology /3~ Precambrian l s Early Precambrian (Archean) l y Metavolcanics l T - f Mafic to Intermediate Metavolcanics 16 Steele Metavolcanics ©7 Adair Metavolcanics f? Metavolcanics north of the i Mistawak Batholith 21 Metavolcanics north of Detour Lake 23 Felsic to Intermediate Metavolcanics 2.5* ~ li Adair Metavolcanics 2.t* Burntbush River Area 23 Lower Detour Lake Area 30 ~ 12 Metasediments l \ Clastic Metasediments 3* Chemical Metasediments If . t Metamorphosed Mafic and Ultramafic ?? Intrusive Rocks Felsic to Intermediate Intrusive Rocks *o Case Batholith ^0 - L Mistawak Batholith W Patten River Pluton 17 Bateman Lake Pluton . 5*0 . t Hurtubise Stock f o Scapa Stock S"\ Unnamed northern Batholith fi Mafic to Intermediate Intrusive Rocks -Tz Late Precambrian (Proterozoic) r? Mafic Intrusive Rocks ri Quartz Diabase S~3 Stratigraphy *"V Phanerozoic rif Cenozoic fs- Quaternary X©b t t r Pleistocene 5b Glacial History r* Direction of Ice Movement J"7 Glacial Deposits *~s l Cochrane Till © Glaciofluvial Deposits r? Eskers r* f Glaciolacustrine Deposits w \ Varved clay, Clay, and Fine sand Recent or r Structural Geology ^© Major Features bf ! Folds bL Faults 63 Minor Features 63 Foliation, Schistosity and Gneissosity fcV- Economic Geology b^ Gold Occurrences k6 Lithium Occurrences 67 Iron Occurrences W Base Metal Occurrences 70 Electrographic Analysis 72. Mineral Exploration Potential 72- Description of Properties 7^* Amoco Canada Petroleum Company Limited (1) 7f Amoco Canada Petroleum Company Limited (2) 7t Amoco Canada Petroleum Company Limited l (Sunday Lake Properties) (3) 7"* [ Amoco Canada Petroleum Company Limited (Detour Lake Deposit) (4) ?* i Asarco Exploration Company of Canada l (Mowat Option) (5) 13 Asarco Exploration Company of Canada (St. Laurent Deposit) (6) **2 Canadian Superior Exploration Limited (7) *f Canadian Superior Exploration Limited (8) #^ Canadian Javelin Limited (9) ?* PT Canadian Nickel Company Limited (10) 27 [^ Conwest Exploration Company Limited (11) *3 Conwest Exploration Company Limited (12) 3S r, Dex Limited (Steele Lithium Occurrence) (13) W r pighem Syndicate (14) f/ Dome Exploration (Canada) Limited (Abbotsford Lake Property) (15) Dome Exploration (Canada) Limited (Tomlinsen Property) (16) L L L r r c Dome Exploration (Canada) Limited (Borntbush River Property (17) Dome Exploration (.Canada) Limited (18) Falconbridge Nickel Mines Limited (19) Geophysical Engineering and Surveys Limited (20) Geophysical Engineering Limited (21) Geophysical Engineering Limited (Noseworthy Properties (22) Hudson Bay Exploration and Development Company Limited (23) Hudson Bay Exploration and Development Company Limited (Noseworthy Properties) (24) Hudson Bay Exploration and Development Company Limited (nash Lake Property) (25) Jubilant Creek Mines Limited (26) Kesagami Syndicate (27) l Mattagami Lake Mines (Jarvi Option) (28) Noranda Exploration Company Limited (29) Noranda Exploration Company Limited (30) I Noranda Exploration Company Limited (31) Noranda Exploration Company Limited (Rube Lake Property (32) i o b Noranda Exploration Company Limited II (Atkinson Lake Properties) (33) 10? Noranda Exploration Company Limited (Detour Lake Properties (34) I^J l Noranda Exploration Company Limited (Hopper Lake Properties) (35) Ogryzlo, S.P. (36) HO L On shore Petroleum Limited (Bornen Group (37) HO Penarroya Canada Limitee (38) /M Rio Tinto Canadian Exploration Limited (39) In Rio Tinto Canadian Exploration Limited (40) J/3 Sarafand Development Company Limited (41) 111 Selco Exploration Company Limited (42) Mff- SILVERPLACE MINES LIMITED (43) 114 Stanford Mines Limited (44) 115 Iriana Exploration Limited (Kenning Prop.) (45) 115 United States Smelting, Refining and Mining Company (46) 117 References 117 TABLES
Table 1: Assessment work filed for the Burntbush Detour Lakes Area 13^ Table 2: Table of Lithologic Units for the Burntbush- Detour Lakes Area 22 o. Table 3: Chemical and Normative Analyses 21^ Table 4: Location of Samples taken for Chemical Analyses * - y ^ L/ Table 5: Modal Analyses of rocks of the Mistava-ie- Batholith Table 6: Modal Analyses of granodiorite of the Patten River Pluton Table 7: Assessment work available for each property r r r lF Figure li Location Map r Figure 2s AFM Diagram 25o/ Figure 3: Jensen Diagram 2.6 o^ T Figure 4: Depth of Overburden in drill holes Figure 5: Surficial Geology AC Figure 6: Composite section through Detour Lake Deposit a^-^ v l Figure 7: Generalized section through Detour Lake Deposits t /i Figure 8: Geological Map of As^rco©s St, Laurend Deposit(t3ac.*L Po i D fi O L L PHOTOS
Photo 1: Mafic to Intermediate feldspar porphyry flow Photo 2: Autoclastic (pillow) breccia Photo 3: Classic pillowed flow 45*u Photo 4: Eutaxitic rhyolite tuff 49ft. Photo 5: Photomicrograph of a Felsic Tuff Photo 6: Crossbedding and rippleinarks in fine grained wacke Photo 7: Flame-like load custs in bedded wacke 5 Photo 8: Xenoliths in a diorite Photo 9: Photomicrograph of intergrown quartz and feldspar Maps (back pocket)
/.y Geology of the Burntbush-De tour Lakes Area, District of Cochrane, scale 1: 3"O LOCATION MAP Scale: 1:1 584000 Figure l or 1 inch to 25 miles Of i©H S! 3J7:115^5^12100:; LAKiio
OF CD^il-.A"-
w j. .*, J J.i J* 5 l l 1 -j2oL 3-jis t f O r* *. j i: i j Jrroioiical S:jrv-?/, Precambrian Jroio-.jy Section, 77 j j i. -./iii r St., V).or.to, Jr. i., ;:5-J 133, Manuscript approved for publication by the Chief, Precambrian Section, October 17, 1979. This report is published with the permission of E.G. Pye, Director, Ontario Geological s Survey. ABSTRACT I.iii r? P or t i s serin-? s the .j-:-oiocfy f inir.eril deposits an i exploration o o t hiotor/ of a reqio;i ^ )una^i uy *9*uJ© to 5!*!^© iDrth latitude and
tn- ^123^2 jDrler a r. i -^O-Wvosr. Ion gituie, an ir ea Df 4030 34. kic ft ajri:i D: -aice Abitibi. l h r- c^-iit^? of th-? Xiap-area is 16S Kin northeast of r ID .a i a3 .
is unletlair. iay nseta volcanics , inera3e1im?n.ts and ijnaous iatrasi/d rocics or PiPCaniLridn aqe, out the majority of the area is t cover?! u/ Plaist ocai..- till and Recent swamp deposits. The oldest s ara Lirly precambrian (Archean) roetavolcanics and sedimaat s. The aota volcanics are sujdividad into nafic to * e and felsic tc intermediats compositions. Ths mafic to e aietavolcanics are generally amphibolitizsd and consist i i i Df flows, pillowed flows with Autoclastic breccia, porphyritic flows and lapilli to pyroclastic breccias. These are overlain by the felsic to intermediate metavolcanics composed of tuffs, lapilli f tuff, tuff brsccia and pyroclastic breccia with minor flow material. In the south clastic metasedioents overlie the majority of the cdaics while in the north they underlie them. Hacks turbidites are the common metasediment whereas only ironrichylninor chemical or ediments are found exposed j&t geophysically interpreted. The metavolcanics and metasediments are intruded by synchronous gabbros * aa d diaoases. These FOCK.S have been metamorphosed to almandine aapaioolite fi-jss and intruded by Early Precambrian oatholiths and stojK.5 of quartz monzonite, granodiorite, diorite and trondhjemite. * Ali of these rocks have been intruded by Late Precambrian (Proterozoic) quartz diabase. l Tne metavolcanics and metasedimentary rocks lie at or within the noses of two fold structures which extend west froa the main body of the Abitioi volcanic belt in Quebec. The southern belt is basically l an antiform produced by the doming effect of the emplacement of the felsia to intermediate intrusive rocks. The northern belt contains a main anticline with associated series of synforms and antiforms. No i major faults or lineaments have been proposed. i The tap-area has been subjected to intense exploration for base l ietil5 siace 1974. During the search for base metals gold was discovered north of Detour Lake. Ten million tons grading i l * approtiaat ely 6.86 ppi gold was outlined within the mafic to ^ inteneiiite netavolcanics. An interbedded ironstone, chert, wacke sequence in southeastern Kenning Township was calculated to have 25 9 parseat iron md a tonnage of 133,000 tons per vertical meter. A s pod ui ea a oearing pegmatite was described south of Little Joe Lake in S t ea Is rorfaship. A low grade copper-nickel prospect has been outlined ^* ia St. ^iurentL Township within the mafic to intermediate m
C Continual exploration is recommended for the felsic to intermediate caaics found in the map-area. All mineralized diamond drill C core should ba assayed for gold.
IHT30DUCI1DS
LOCAIIOa
The aip-area is bounded by Latitudes U9+OC" and 50*OU©N and the Qae^ec oorder and Longitude SC^CC 1 W and comprises 4?3? square kilomatars in northeast Ontario. The map-area includes the Townships u u of Dridstte, Noseworthy, st. Laurent, Hprt^bise, Clivs, Singer, Adair and Aabotsfori. Parts of Hepburn, Scapa, Steele, Case, Kenning, ToBliassn and Hoblitzel Townships are also within the lap area. That part ?f toe nap-area which includes the surveyed and unsurveyed townships are in the Larder Lake Hining Division and the unsubdivided portion to the north is in the Porcupine Hining Division. The l
* map-area is north of Lake Abitibi and its centre is 169 km northeast of riimins. 9
ACCESS
lae southam portion of the map-area is crossed by tha Abitibi Power and Piper Company Limited©s trans-limit road. The trans-limit road meets with diqhwiy b52 from Cochrane, 93 km to the west and directly with tha mill in Iroquois Falls 95 km away. La Sarre, Quebec is 63 km east ria the trans-liitit road connecting with the highway through St. Lamoert Dasmeloizes, Quebec. Connecting with the trans-limit road are natrforfcs of ajxillary haulage roads acd feeder roads. The haulage roads presently in use are in Scapa, Case and Kenning Townships. The furthest norti one may be able to drive is the Patten River in the sou:h portion of St. Laurent Township. These roais are in unknown condition ani are only accessible by roads through Adair Township iron St. Dphrsm de Paradis, Quebec, since the bridge crossing the Pattai Eivec is gone. The haulage and feeder roads not presently in use are in various stages of disrepair and may or may not be passable.
© The northern part of the map-area nay be reached by float equipped aircraft ani helicopter from Timmins and float equipped aircraft from botn Co-tirane and La Sarre, Quebec. From Cochrane and La Sarre it is * 134 ki ani 131 km respectively to Detour Lake in the north central . part df the map-area. From Detour Lake to Timmins it is 200 km.
l
l c c c NAT3RAL E&SJOaCES
The lip-area lies within theoreai Forest Region and is subdivided into two suosactions; the Northern Clay and the Hudson Bay Lowlands (Bo©3, 1972). The Northern Clay subsection has large stretches of * blaes, spraca, which cover the gently rising ground as well as the lowland flats, where the trees alternate with extensive sedge and sphaqiDJi loss swamps. Better drained areas contain mixed stands of C whic.9 birrh, ooplar, white and black spruce. Stands of Jack Pine are found over outwash deposits, old beaches and eskers. The Hudson Bay Lowiiadi suossction has an open woodland appearance of black spruce * and tamarack interspersed with numerous muskeg swamps. The better drained areas along riverbank levees, have white spruce, balsam fir, poplar md white birch growing on them. t The Auitioi Power and Paper Company Limited has been harvesting the black spruce from the southern portion of the aapjarea for the past v two tD thres decades. Clear cutting has occurred in Clive, Adair, , Case, steele and Scapa Twonships. Current cutting is aaddrrfay in northern Case Township and southern Kenning Township
Pifc3 and Pickerel are the most common fish, found in lost lakes and strsais. DCDDlc trout has been reported in the smaller rivers in the southern portion of the map-area and in the fast moving waters of the Buratoush and Patten Rivers. Lindberg Air services in Cochrane J maintain in outpost camp on Detour Lake.
l Boose and osar are abundant and cariboo were seen occasionally by l lenbers of the field party. Beaver* wolf, rabbit, weasel, red fox, skunk aad grouse were identified by sight or spoor.
I TOPDaiAPd* AND DRAINAGE
9 fcxcept foe tha southern half, the map-area is flat ani swampy with an * average elevation of 300 m. In the south, the more abundant outcrop, * farm topographic highs in the form of ridges. The Steele ridge has a C maxiiBjffl elevation of 423 m above sea level south of Little Joe Lake v ana decreases in elevation to the east and west. The granite hill north of Joe Lake in Adair Township has an elevation of UCO m above v sea 13V31. The most rugged portion of the map-area is the large U 0^f • outcrop area in Hurtubise and St. Laurent T-w-anships. The elevation is aboat 423 m above sea level and vide spaced, deeply eroded, joints * \s hava given the hills a stepped nature. In Kenning 4 Abbotsford. Adair w aad Hspaurn Townships the outcrops form southeast to easterly v, tr ea dinq riigss with a maximum elevation of about 50 m abotfe the * j surroanding ground, the ridges are interspersed with poorly drained * Pleistocene deposits. The outcrop in the rest of the map-area is in the form of knolls within the extensive muskeg.
w Throughout the map-area the drainage is poor as characterized by the ce of muskeg swamps. A large part of the map-area is drained * ijy ihs Burnt bush-Tur geon-Harricanaw river system which flows into 5DutB*ra Jaass Bay. The northwestern portion of the area is ultiiitaly drained by the Kattawagami River. The extreie southwestern * pore ID L of th* area drains into Lake Abitibi and hence into the Abicioi diver system into James Bay. The Burntbush River, Patten C F. iv- r and most of the Kabika fiiver are suitable for transportation by C caiije witnin a minimum of portages. C 5 520LD3ICAL INVESTIGATIONS C Ine ireis witnin and surrounding the map-area have oeen suoject to surveys dating bacK to 191U. Tanton (1919) mapped the cistern eiqs of the area in 191U and 1915. In the fall of 1917, -L©OtKiasH (1918i undertook a track survey of the La Rein (Dkiodosik) C a aa c©lttea clivers* Thomson (1936) completed a reconnaissance C gsoLDgijal survey of the Burntbush River area in 193U. The Townships ^ of Stsela, rfoais and Scapa were mapped by Lumbers (1962) at a scale *- t- of 1 iajh t.a 1/4 mile (1:15,8uO) in 1959. Hepburn Township and parses *- of Sar^aaat, Adair and Abbotsford were mapped by Lumbers (1963) in ^ 196J at the same scale. Lumber©s work was incorporated into within- 4© the present sarvay. In 1966 Bennett et al. (1967) mapped 71 f 68C sg. *- ka wnich included the entire BurntbushOetour Lakes Area. The Twopeak A s araa, imaediately adjacent to a portion of the western boundary w Df the prasent survey was mapped in 1976 (Wilson 1979) .
PE252iir liSOLDSICAL SURVEY
t l 3 t Field work for this report was undertaken between Hay 29 and August 24, 1976. Tae crew consisted of the author, one senior assistant and * three janior assistants. t Happiig was done using air photographs with a scale of 1 inch to 1/u fc mile (1:15,8UO), taken in 1961 ana 1971 and provided by the Air Photo Library, Siaistry of Natural Resources. Mapping was also done using air photographs with a scale of approximately 1:50,000 supplied by w the National Airphoto Library, Department of Energy, Hines and i rces, Ottawa. The 1:15 9 8UC photographs only covered the outcrop * tadt wsre delineated ty operation Kapuskasing (Bennett et al. 1967). .Ihs 1:50,000 photographic coverage was for the entire map-area. Oatcrop geology and boundaries of outcrop areas were plotted ia tha field on acetate overlays to the airphotographs; the fc data rfere transferred to Forest Resources Inventory maps (scale 1 inch to 1/4 mile or 1:158 f 8UC) of the Timber Branch of the Ontario Hinistr/ of Natural Resources. The F.B.I, maps were then B phot ograpaically reduced in Toronto to a scale of 1:50,000 and the inforiatiDn contained was transferred to the base maps prepared by the Cartography Section, Surveys and Mapping Branch, Ontario Division i) of Lands at a scale of 1:50,000 from reductions of Forest Resources Inventory maps. mV Steels, Scapa, Hepburn Townships and par/st of Ada^ri and Abbotsford A** r* Townships previously mapped by Lumbers (1962, 1963) were **-* mapped * Dy tna peasant field party out major rock types and important relationships were examined. Since the outcrop density in the rest of the map-are* is less than 10 percent an attempt vas Bade to visit as l many Df tne outcrops, outlined by Operation Kapuskasing (Bennett et al. 1957) and as many of the outcrops discovered by the field party as pDssiole. Outcrop groups were examined using pace and compass . ©* * mataois and isolated outcrops were visited using a helicopter. ^y is not tied to surveyed lines. The geology in areas without exposure was interpreted using©diamond drill logs from the AsaassaaLt Pilas, Research office in Toronto and ODH-3SC, 1 mile to 1 iacii (1:63,363) aeromagnetic maps.
The h2lis3pt?r was used in deploying traverse craws in areas without coda iccess and for examining individual, isolated outcrops. They party usal a Bell G-U helicopter for part of the summar and a Dell S-2 fsr tae remainder.
ACKNDWLclDjEilEHTS
The ijtaor uas assisted in the field by Anna Bivi, David Graham and Baliola Stelly as junior assistants. W. Motley did some independent traversing.
The halp md co-operation of the staff members of the Ministry of Ndtaril Rasources; in Cochrane, the Timmins Fire Centre and the Eegioaal JeolDgists office is acknowledged and their end of season is greatly appreciated. The road and cutting limit map supplied oy the Abitibi Power and Paper Company in Iroquois Falls aided in t ne geological mapping in the south. The patience of the a-t i Abitioi personnel in Commuter Camp 8 -^f the end of the field season is apprsciacei. i
The ijqistisaL and moral support supplied by W. J. (Bill) Blahey **a i ii ii f ©~ i niii j © i n 1 mil H" i ii ft in Timmins^is hereby gratefully acjtnorf laiqei. The accommodation and hospitality at the Detour Lake * * iiin^ site supplied by Don Deem, Senior Mining Engineer Amoco Canada Patrpieiiin company Limited; Germain Gagnojrn and Richard Legault of the J. 5. iaipitn Zoapany was greatly appreciated oy the field crew. The t infDnation, obtained by the author, from discussions with Paul ijcorfn, SdJlogist, Amoco Canada Petroleum Company Limited was very * halpfal ia tha final interpretation of the map and is hereby ladqei.
oiael of /anger Lake Helicopters of Sault Ste. Marie assisted in * tfte performance of the field work. Serving as pilots during the ^ samjier were: Mart y Sinclair from Sault Ste. Harie and David Brooks from Pickle Lake. i ^ The ajthor woald like to acknowledge the assistance extended by Dale t* Pyke, suDsection leader, Ontario Geological Survey during the i preparation of this report. 9 11
P This project was f/fanded by the fiinistry of Na^tfral Affairs under the Jfbrth*ra Affairs Geological Surveys (NAGS) program, Gaoseg yi-ce Surveys Narth-Eastern Ontario.
PROSPERING ASD MINING ACTIVITY
© A g^li iiscDv^ry was reported on the Patten River in 1912 (Tanton, 1919). Th3 subsegusnt rush of prospectors failed to find any valuaole deposits. Exploration activity has been sporadic since 1925 with * increases in the late 1950s, mid 1960s, and recommencing in the early 197?3, Exploration has increased since 1974 with the announcement of a goli discover uy Amoco Canada Petroleum Company Limited north of * Detour Lake. l The initiation of prospecting activity in 1925 was due to the * disco/ery of copper-zinc mineralization at Normetal, Quebec. The rD cts that appeared to be most favourable for prospecting for base metals dt that time were the metavolcanic rocks in Adair Township 1 which are structurally and lithologically similar to those rocks 3d at the Normetal Hine. Exploration on these rocks has failed to discover any mineral deposits. Also examined were the mafic metavolcanics in Steele Township. In the early 1930s Cyril Knight prospected for gold on a group of claims along the Burntbush River. (Thomson, 1936).
Buca assessment work has been filed with the Assessment Piles 12 l fiesearch Jffice, Ontario Geological Survey, Toronto since 1957 (see 1) . Recently the exploration for oase metals has been sonseatrat ed in: a) the isoclinally folded sequence of felsic to fc inteneiiate, mafic to intermediate, metavolcanics ani iron rich s in Adair and Abbotsford Townships; b) the felsic to e letavolcanics in Bradette, Noseworthy and Hurtubise i lownsiips; ani c) the interbedded felsic to intermediate, mafic to intaraeiiite netavolcanics and metasediments in the vicinity of Vaadette md Atkinson Lakes. Three deposits of economic interest have ^ been discovered within the map"area. 1) la Steele Township a spodumene beariaq psgaatite has been assessed for its lithium and is held by t Dex Liaitsd. 2) a low grade copper, nickel deposit was discovered in l St. Lurent Township© by Asdrco Exploration Company of Canada. 3) In the Sinldy Lake area Amoco Canada Petroleum Company Limited has f outline! 10 million tons of 0.2 ounces per ton gold (a value of ^© 539.78 a. S. par ton as of the price of gold November 1978). f f Daring the /i3ld season the following companies and individuals held f clans rfithin the map-area: Amoco Canada Petroleum Company Limited, Asarco Exploration Company of Canada, C. Bertrand, G. Brissette, Dex 5* Limited, Dome Exploration (Canada) Limited, Geophysical Engineering * Limited, Hollinger 3ines Limited, Hudson Bay Exploration and Development Company Limited, D. Haillet and Noranda Exploration Compaay Limited.
. SENialL UEOLD3Y i l 13
Ine np-area lies in the northern part of the Early Precambrian Abitibi dslt Df the Superior Province at the nosas of two folded supracrustal sequences extending west from the main volcanic sedimentary sequence in Quebec. The metavolcanic/ietasedimentary rocks ! A have aniergons regional and contact metamorphism, ranging from upper * greenschist to almandineCimphibolite facies rank. ( i The 53utnsrn oelt of supracrustal rocks which is found between the © soutaera aa^ Doundary and latitude U9*35* appears to be composed of eitn^r two volcanic piles which have a common metasedimentary unit or a siiiijii, oroadly domed sequence. In the southern portion the case is * composed Df interdigitated mafic to intermediate metavolcanics and
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14 m map-area. c North of Lha listawak batholith, the base of the metavolcanic C saqieice is i thick section of mafic to intermediate flows with minor interoeiisd felsic to intermediate tuffs, overlying this are the felsic CD intsrmediate metavolcanics with minor interbedded mafic to C intarieiiite metavolcanics and clastic metasediments. These metavolcaaics thin and disappear to the west. The lateral equivalent C to me Scapa metasediiaents cap the sequence. C The soathara belt was intruded by the quartz monzonitic to x qrauoaioritic HistdVdk oatholith and Case Batholith as well as the C qranoiioritic Bateman Lake pluton and Patten River pluton and the trondhjeaitic HurtuDise stock. These felsic to intermediate intrusions ioaed the supracrustals and caused local complications in C- the structure. Lack of outcrop precludes a detailed description.
Ih2 iiDrLttsra supracrustal belt is found from U9 + U5 1 north latitude to C the iiDrtaern map boundary and from the Quebec border to 79^35* west longitude. This metavolcanic-metasediaentary sequence©*lowest unit is C A t^d to be felsic to intermediate metavolcanics. This is * Dveclaia oy a thin clastic metasedimentary unit which in turn is . overlaia oy mafic to intermeuiate flows and pyroclastics. Interpreted C by ths author to overlie the mafic metavolcanics is a generalized unit containing; in decreasing abundance, interbedded felsic to . teta volcanics, nafic to intermediate metavolcanics and w
9 C * 15 r * fins qninei netasediraents. This generalized sequence grades laterally to the northwest into metasediments with the occasional aaric flow. Within this generalised capping sequence, graphitic tuffs tA f and istasediments, often with large amounts of associated sulphides.
fc© The northern supracrustal sequence is surrounded by quartz monzonitic
P Datholitas which folded it into a rowgh triangular snaps. The fold axej within tne belt were further warped by the intrusion of the l diorite ns-ar Detour Lake.
Tae lisi magmatic event was the emplacement of diabase dykes which intruie all rock types and cross major structure. These UQ Hi3L im^cpQDsai dykes have oeen dated Dy Fahrig et al. (1965) at 2.435 t3 1.23? billion years.
E D st ty^es observed within the nap-area are outlined in Table 2.
l LAEi.^ PAE^A^BRIAN (ARCHEAN) l
METAV3LCAM1CS
I h e m^tavDlcaaics have been divided on a two fold classification. This was done because the low outcrop density, and extensive use of 17
i- regions. t Comion liaeral assemblages for the mafic to intermediate metavolcanic * LOCKS are: r hornblende *- feldspar * sericite
±:? h ^ hornjieads * feldspar * actinolite * biotite * garnet * sericite *
chlorite * feldspar * epidote * sericite * sphene
^ 2til3rita * feldspar * sericite * caroonate * epidote
Ainpaiooiitized massive flows and pillowed flows are the most common - lithologic type with minor aaounts of tuff, lapilli tuff and pyrsslastic breccia, feldspar porphyry flows and autoclastic breccia, Individual lithologic types cannot be traced beyond the outcrop on whicn tney occur.
) SIStLS SfilAVOLCAHICS
i
The aific to intermediate metavolcanics classified by Lumbers (1962) as the Staels Volcanics occur in a narrow belt, 1500 m wide in the * east ani BOO i wide in the west, of amphibolitic mafic to interieiiats metavolcanics. Lumbers (1962) recognized amygdaloidal, c c ia
^ pillowsi, massive, diabasic and porpnyritic flows. In addition the autnor ilso recognized mafic pyroclastic deposits. A 1-3 m thick pale grey*garnstiferous^oiotite-quartzfeldspar schist was found as an A w interflDw sediment. These individual lithologic types are not extensive enough to be distinguished at the present scale of mapping.
* The grain siz* of the amphiuolitized flows of the Steele Volcanics depends on the proximity to the Case batholith. Grain size varies froa. tine grained near the Stqele Ketasediments to coarse grained *- near the 3ase ortholith. Colour varies from light grey to dark greenish uldc*. The light colour is due to the abundant development of epidDta and feldspar while the dark colour is caused by abundant 5 horuoleads with minor biotite.
* G The massive to foliated flows nearer the ease batholith show * indications of mineral banding formed oy the segregation of amphiboies and feldspars. Pillows, where seen, are stretched and badl/ informed. The porphyritic flows contain about 5 percent of 1-2 mm feldopir phenocrysts and are found along the south contact of the ics with the Steele Ketasediments. Carbonate patches are weathered out and may be mistaken for amygdulas. Euhedral 1 garnets (*2 mm - 5*8 mm) are common. Flow thickness is indicated by a pillowed mafic flow which/^uounded by two mafic tuffs, indicating a j - .. thicKness of approximately -9-* m. Air fall tuff breccia is composed of * lapilli and bomb size subrounded to subangular clasts in a poorly sorted tuff. The tuff oreccia and tuff horizons are not extensive and 16
diamond drill logs for interpretation made a three fold classification impractical. The icetavolcanic rocks were divided into mafic to intermediate and felsic to intermediate compositions. In the field tnis was done by determining the colour index of the rock by observing the weathered rind of the sample with a good hand lens. The mafic to intermediate metavolcanics generally hai a colour index greiter taan 25 while the felsic to intermediate metavolcanics had a colour LLiex less than 25.
S Che.nically ths metavolcanic rocks are primarily tholeiitic basalts aaci cal--alicaline rhyolites and dacites with minor tholeiitic dndsjsit* dnd dacite and calc-alkaline Ddsalt and andesite. The l* cuesta! jlassificdtion for the rock types were determined using the ternary diagrams of Irvine and Baragar (1971), Figure 2 and Jensen t (19761 t Figurs 3. The chemical analyses and normative calculations * are tiualated in Table 3 and the location for the analyses are in Table 4. t
tw © SAPIc*J H t? T *** "T-iJ "^ xNiEaniDIAI-T VI T f ^ Ml ^ *^ T* H *P *^ H&TAVO^CAMIv.SM ^ *f* Ik \ f ' ^ ^ ^* ^ \ I T ^ t?
*^ The iific to intermediate metavolcanics ci^-e-p0 out in only four ^ regioas of ths map-area although they are interpreted to be much more extensive. From south to north they can be found in: Steele Township; Aobotsfori, Adair and Hepburn Townships; Kenning, Hurtubise and St. v Laurent Townships and between Lower Detour, Detour, Hopper and Sunday . Laxas* Minor scattered outcrop is found outside the aforementioned 19
pin-n oat within a few meters.
The priacipil constituents of the amphibolitic mafic to intermediate ics in Steele Township are blue-green hornblende,
* se, sericite and garnet with accessory carbonate, sphene and opa-jues. Chemical analyses (Table 3) of two samples from these # metivalcaaiss classified them as tholeiitic and calc-alkaline andesite*.
r. HSIiVOLCAXICS
The jiafic tD intermediate metavolcanics that occur within Lumber©s (19o3l Adiir Volcanics are interdigitated with the felsic to i j intermediate letavolcanics. The mafic to intermediate component of j he Adair Volcanics can be traced from the Quebec border to 9 Aobotsfari Lake, 22.5 km to the northwest, where they are interpreted j by tne i ut h or to pinch out* Lumbers (1963) recognized massive, 1 amygdaloidal, pillowed, gabbroic and porphyritic flows. In addition | - the diituor examined tuffs and lapilli to pyroclastic breccias interoedded with the flows southeast of Abbotsford Lake. j
* The aipaibole rich flows are fine to medium-grained ranging in colour froi gray or pale green to dark greenish black. Epidote pods and veinlets are common in the finer grained flows. Pillowed flows are, for the most part, deformed, but just west of the Patten Hiver Pluton / /\ (1953) was able to ascertain south facing stratigraphic tops. The * 20
A * porphyritic flows (Photo 1) found in southeastern Abbotsford Township consist of 50 percent white feldspar phenocrysts averaging 3C mm in length. The phenocrysts grade to the north, over a distance of 50 cm, ) into lassive fine grained lava. Very fine grained, schistose, garnetiferous, porphyritic tuffs are found interoedded with the metav3lcanic5 of the Adair Volcanics and may be mistaken for * porpayritic flows. The garnets occupying up to 15 percent of the rock, are suoaedral and pale pink to white in colour. The matrix is a fina graiaed dark green, soft, schistose mafic tuff.
Insert Photo 1
Mafic to intermediate pyroclastic rocks have seen recognized 3.5 km southeast of Abbotsford Lake. Fine grained, dark grayish green, dense, garnetiferous tuff is interbedded with a lapilli breccia. The * lapilli breccia contains light grey, tuffaceous clasts, UO mm in maxioum dimension set in a dark green matrix. The clasts are subrounded and elongate parallel to foliation.
Hornblende, tremolite-, actinolite, sericitized feldspar, garnet and epidote are common rock forming minerals with biotite, chlorite and opaques as accessories. Relict bedding is visible in thin sections of the fins grained dense tuffs* The rocks are highly metamorphosed and garnet is comionly visible in the outcrops. An analysis of a sample M from near the contact with the Scapa Xe t a sediment s classified the mafic to intermediate flow as a high magnesium tholeiitic basalt. 21
^ , /( MBTAVDLCASi:S NORTH OF Tub WISTAWAK BATHOLITH V.
^ kf- The ffldfic to intermediate metavolcanic rocks found north of the Mise i* d K. odtholith and interpreted to be around tha Bateman Lake platoa cra-*p out in northeastern Kenning Township and southern t hurtubise and St. Laurent Townships. Lithologic rock types recognized are missive and pillowed flows with autoclastic breccia, tuff and V pyroclastic breccia. Along the Case and Kabika Rivers in Kenning ^ Towasaip, south of the Hurtubise stock on the East Kabika River and OQ tha Burntbush River the mafic to intermediate metavolcanics are ( chloritic ani have oeen carbonatized. In central Hurbubise Township ( ana nortnuest and northeast St. Laurent Township the mafic to intermediate rocks have been epidotized. In southern Hurtubise and St. Liureat Townships the metavolcanics are all amphibolitized. f The zhloritiz, carnonatized mafic to intermediate metavolcanics are soft , well foliated, weather dark cream green and are pitted on the ( weathered surface. Fresh surfaces are medium to dark green. The spiJDtizei flows are very fine grained and have X cream weathered surface and a pale green to grayish green fresh surface. The (- ampnioolitic metavolcanics are fine grained, crystalline, weather dane orownish buff and are dark green on fresh surfaces. Epidote clast* ani stringers are common as are rust stained fractures and ^ joints. l 22 l The pillows found in the epidotized rocks are generally little defonei, are up to 1 m in maxim urn dimension and exhioit well developed selvages up to 5 cm thick, and contain amygdules filled i vita carbonate and quartz. Pillows in the amphibolites are usually somewhat ieformed but generally good enough to determine tops. t. AssD-iitei with those pillows are Zones of autoclastic breccia, photo t 2. I h s orsccias are composed of monolithologic, 10-2C mm subangular, surrounding croken pillows which have brecciated cores cemented uy caroonate. C lusart ?uato 2 i f luffs dad pyroclastic breccias are rare and were noted on the Kaoika and Sist iaoika Eivers. They are thick bedded, varying from fine to aediui-qriiaei lithic to crystal lithic tuffs associated with pods of *f iroa rich metaseaiments. The pyroclastic breccia contains stretched, liqut gresn porphyritic clocks in a dark green extensively foliated f chloritic matrix. f Ihe carDDiatized, chloritic rocks contain chlorite, feldspar and epidote with associated sericite, car Donate, quartz and hornblende. C Secoaiary, quartz eyes were observed in hand sample and were noted to be strained in thin section. The epidotized flows contain feldspar phenozrysts (\n26-33) in a very fine grained, highly altered C t groan i m d S3 containing granular clouds of epidote. Chlorite and quartz occur as vesicle fillings. The amphibolites are fine grained, Table 2: Table of Lithologic Units for the Burntbush-Detour ______Lakes Area^..^^---- - ^..^.^^^.^^..^.^.^.^.^.^^...^.^^^..^.^ PHANEROZOIC CENOZOIC QUATERNARY RECENT Swamp, stream and lacustrine deposits PLEISTOCENE Till, clay, sand and gravel deposits Unconformity PRECAMBRIAN LATE PRECAMBRIAN (PROTEROZOIC) MAFIC INTRUSIVE ROCKS Quartz Diabase Intrusive Contact EARLY PRECAMBRIAN (ARCHEAN) MAFIC TO INTERMEDIATE INTRUSIVE ROCKS Diorite FELSIC TO INTERMEDIATE INTRUSIVE ROCKS Quartz monzonite, granodiorite, granite, quartz diorite, feldspar porphyry, quartz, feldspar porphyry, gneiss, pegmatite, felsite, trondhjemite Intrusive Contact METAMORPHOSED MAFIC AND ULTRAMAFIC INTRUSIVE ROCKS Gabbro, Amphibolite, porphyritic gabbro, ultramafic rocks (not exposed) Intrusive Contact METASEDIMENTS CHEMICAL METASEDIMENTS Irons tone, chert CLASTIC METASEDIMENTS Wacke, arenite, arkose, calc-silicate rocks, grit, fine grained to very fine grained graphitic metasediments and tuffs, schist METAVOLCANICS FELSIC TO INTERMEDIATE METAVOLCANICS Flow, tuff, lapilli tuff, pyroclastic breccia, tuff breccia, porphyritic flows. MAFIC TO INTERMEDIATE METAVOLCANICS Flow, tuff, lapilli breccia-pyroclastic breccia, amphibolite, pillowed and porphyritic flows, pillow breccia 23
* crystilline and contain hornblende, chlorite 6 feldspar with minor epidote, sericite and opaques. l
— J /|ttETkV}LCAtfi:S NORTH OF DETOUR LAKE
o Ihe aific to intermediate metavolcanics rocks found north of U9+U5 1 * north latituds, except for two small bands around Vendette Lake, are interpreted to be from the same stratigraphic unit. The two mafic to i ^ intsraediite horizons through Atkinson Lake and Cuthbert Lake have no : outcrop associated with them and were interpreted from diamond drill ©^" nola iatal and aeromagnetic maps. Outcrop is found along the -f A oj-j jut 3 ut i-© i l o G i a.cjarch ufiioej Ijror.to/ Ontagia
nortu and south limes of the northwest trending anticline that is found narth of Lower Detour Lake. Except for the outcrops near the w * quartz monzonite batholith, which are medium grained amphibolites, the rocjcs are fine grained and have well preserved primary textures. ~~ The fDliorfinq lithologic types were recognized; flows, pillow flows * with autoclastic breccia, tuff, lapilli breccia to pyroclastic areccid and porphyritic flows.
l The flows weather a dark olive green and have a dark green fresh surface, gpidote clots and stringers are common as well as garnets which are found in pillow selvages and foliated tuffs. One kilometer © northeast of the Amoco site the outcrops containing flow material also have associated with them minor medium grained, crystalline
-t- /s f ess 2U
Pillowed flows with garnetiferous selvages are common throughout, and Photo 3 is an example of tne best of the pillows. Several top determinations were obtained from these and other pillows. Autoclastic breccia associated with the pillow lavas is found west of Lower Detour Lake. This breccia is monolithologic containing unsorted subangular to angular fragments, ranging from less thin 10 mm to 10 cm in size. North of Detour Lake interbedded, darn, qraea, fine grained, foliated garnetiferous tuff is found interbedded with decimeter thick, unsorted, beds of lapilli breccia. The lipilli breccia is heterolithologic with intermediate and mafic cl^sts ranging in size from less than 2 mm to 60-70 mi. The clasts of l-* iQtarnaiiite composition are elongated from &+1 1 and the mafic clasts are eloaqited 6:1. The clasts, in general, are more felsic than the tuiidreous matrix. Hinor porphyritic flows with less than 10 percent feldspar phenocrysts 12 mm in size are found interbedded with massive equigranular flows. i Insert PhDto 3 e Ide information obtained from diancnd drill logsl (1 AgaaaamsnL Tiles Rajtacoh 3fE4-s-e-f 7JEonto t Onto* and observation of outcrops indicates * that felsic to intermediate tuffs, sediments and gabbros are interbeidad with the flows.
V V
C The flaws are fine grained, equigranular and contain minor mineral bands. Hornblende and feldspar are the common rock I 25
I forcing minerals with minor epidote, sphene and opaques. Patchy sericit-j alteration was noted. The tuffs contain hornblende, chlorite, garnet, biotite and carbonate. Feldspar is lacking but this * may be iua to the metamorphic reaction leading to the formation of garnet.
these rocks are high iron tholeiitic basalts. t F 21.31: TO ISTSRJSZDIATi: ri^TA VOLCANICS l o Ihe falsiJ to intermediate metavoicanics cc-a-e? out in Adair, fsri ani Kenning Townships, Bradette and Noseworthy Townships i and i.i isDlatsd outcrops in the northern part of the map-area. Using diamond drill hole logs and geophysics they are interpreted to be extansivsj within the northern supracrustal belt. l m**.*"/©*""* Common liaeral assemblages for the felsic to intermediate^rocks are:
* i sericite * feldspar * quartz * carbonate * chlorite * epidote * i biotite * garnet l chlorite * hornblende * biotite * feldspar * quartz * garnet 9 horubleada * feldspar * guartz * sericite * carbonate * biotite i t z 0) N) c? O•f- * ISJ O
-n o -t m
mZ
M
> r •7! O f 0 n O M •f Z < "3 M O ve TJ (D 8 NJ 5* C en w CJ
C**
< 26
* feldspar * muscovite * sericite * quartz l sericite * feldspar * quartz l sericite * feldspar * quartz f carbonate * epidote
The aetdifflorphi:: grade is predominantly almandine-amphibolite facies. lafz" is tae most extensive lithologic type found within the felsic to iiitica elidte metavolcanics with lapilli tuff, pyroclastic breccia, tufi uraccia md flows occurring in lesser amounts. The siassif icdtioa scheme used in descrioinq the pyroclastic rocks is from Fisnsr (1966, p. 292).
The felsic tD intermediate metavolcanics that occur within Lumber©s © *sitk (19o3) Addir Volcanics are interdiqitatei ji^fe -the mafic to l intsraedi-ite netavolcanics. The felsic to intermediate component of t the Adair Volcanics car. be traced fron the Quebec border to the i southeast corner of Kenninq Township a distance of 33 km. In 1 northwestern Abbotsford Township and southeastern Kenninq Township the md fie to intermediate component has disappeared and the felsic to intenediate ieta7olcanics are interdiqitated with the clastic i metasediment s. Lumbers (1963) descrioed tuffs, porphyritic flows and "agqlameratas". The author has seen in addition to the tuffs and C. o m H z UT n CO > o i—*z z o CO*^J o CT* D s-x 7x o CO ^ o z z l-o -o c r- o o
o 75: 20 a 2 co > C -H 03
m
o
fc -tc T (C to c
X DB O Q) 3 W Di 0) ft M H- ft H- H- rt n
nft Q) 3 Q)
O
O Q) ft
ft (D
03 O 27
flows soins coarser grained lapilli tuff, and tuff breccia. All the rocus are garnetiferous. The author did not examine the outcrops east of tha aace Bay road and the readar is referred to Lumbers (1963, p. 11, 12) for detailed descriptions.
Ihe metavolcanics of more intermediate composition weather a light qrey wita a light green to grey fresh surface. The more felsic the composition the lighter the weathered colour becomes until an outcrop appears wuite. The felsic metavolcanics have a hackly weathered surface dud generally have a concoidal fracture.
The tifts are well sorted, fine grained, recrystallized and generally tail beidad. The felsic tuffs locally have beds less than 1 mm thick. .A eutaxitic rhyolite tuff (Photo U) is found east-southeast of ADuDtsiDri Lake, It is 7 m thick with an associated pyritiferous horizon. Stretched cherty quartz pods, approximately 1 mm by 15 mm imparts the eutaxitic texture. Lapilli tuffs, up to 7 m thick, occur intaroeiaed with the tufrs. Stretched clast sizes range from 3 mm to 15 am in length. The fragments are generally more felsic in appaaraaca than the matrix. Isolated occurrences of coarser, grained A pyroclastics were found southeast of/A^botsford Lake and Lumbers (19631 reported finding "agglomerate" south of Joe Lake. Coarse grained pyroclastics are found around the Nonmetal Hine in l Dasaeloizes Township ir. Quebec (MNR Special Paper No. 2, 1967) . There * appears to be a westward fining of the pyroclastics and as such the majority of the felsic to intermediate rocks are distal facies. "tilt 3 : c A*""-teal c/ ^tcf A?or*r?c i *4L G rt artfyfe* e f t{i*, t^^^ci c^Yr o *? i c - y - /9 \ . X i cc" r** k* • * t r*^. /j o jmtl***, 'ti G. &L ^K* ^-^ L,S SJr*
Sar.rU e 78-11- 78-11- 78-11- 78-11- 78-11- 78-11- Numb c r 19 72 83 1?3 ?3? ?34
Irvine fc Bararcjar. Thole Thole Thole Talc-alk Calc-alk Thole Ko c!; X nine And. Fa sal t Basalt And. high ^asalt Basalt Al high Al Si02 50.5 63.0 48.4 60.9 56.3 49.3 A1203 16.3 12.5 14.2 17.3 17.5 14.1 FG203- 13-0 6.69 17.6 5-51 5-69 15-3 MgO 3.40 4.80 6.72 3.01 3.46 4.29 CaO 9.85 5.31 8.79 7.39 10.1 8.49 Na20 2.22 1.66 1.97 3.28 3.40 1.56 K20 ' 0.23 0.12 0.24 0.25 0.05 0.23 TiO2 0.73 1.03 1.32 1.11 0.65 2.13 P205 0.12 0.23 0.10 0.17 0.09 0.21 MnO 0.64 0.36 0.23 0.17 0.10 C02-!- 0.24 0.25 2.64 0.25 0.29 1.79 1.01 S+ 0.1 CO. 01 0.06 < 0 . 01 <'0.01 0.02 L.O.I.* 1.0 5.2 0.8 0.9 3.4 3-8
Total 97.99 100.90 100.37 99.99 100.74 99.65 S. G. 2.98 2.70 3-07 2.78 2.87 2.91 C . I.P.W Norms
AP 0.29 0.56 0.24 0.40 0.22 0.51 IL 1.45 2.05 2.56 2.13 1.27 4.27 OR 1.42 0.75 1.45 1.50 0.31 1.44 AB 19-58 14.74 16.99 28.09 29.66 13-94 AN 35.27 26.07 29.76 32.13 33.35 32.52 C 0.00 0.56 0.00 0.00 0.00 0.00 MT 3-37 3.85 4.17 3-83 3-21 5.56 HM 0.00 0.00 0.00 0.00 0.00 0.00 EN 6.62 12.55 14.43 6.34 3.90 9.33 FS 12.47 3-94 17.54 0.95 1.44 11.54 Q 6.97 34.94 1.18 21.59 12.42 12.13 DI 4-75 0.00 5.67 2.69 10.76 4.22 FO 0.00 0.00 0.00 0.00 0.00 0.00 FA 0.00 0.00 0.00 C. 00 0.00 O.OC HE 7.80 0.00 6.01 0.35 3.47 4.55 RU 0.00 0.00 0.00 0.00 0.00 0.00 * Fe203 as total iron 4- Included in L.O.I, l Loss on Ignition F;irv - 1 --' 78-11- 78-11- 78-11- 78-11- 78-11- 78-11- :-;^:--L.:-'- 237 258 277 357 ?57 259. Ir--;.:- K Bar ci r 9 r -r Thole Thole Thole Thole GaVbro Kafic Feeder Roc h Nrt;nc?- Basalt Basalt Basalt Basalt Thole Tyke Thole High Al Basalt S i O/. 48.4 50.2 45.6 50.5 47.8 45-6 A12C3 15-2 15.3 14.6 16.6 14.2 13-5 K e 20 3 ';- 14.5 13-3 20.9 11.1 16.7 12.8 McjO 7.11 7.94 3.86 8.76 5-81 9.88 CaO 9.83 9.21 9-78 9-48 8.47 11.2 ^a20 2.40 1.12 1.05 0.74 3.17 1.11 K20 0.07 0.90 0.19 0.09 0.22 1.31 TiC2 1.32 0.78 2.08 0.52 1.41 0.79 P205 0.10 0.10 0.14 0.09 0.15 0.07 MnO 0.22 0.21 0.26 0.12 0.24 0.20 CO 2 -y 0.36 0.19 0.48 0.42 0.89 1.03 S+ 0.02 0.18 0.02 ^.01 0.01 0.34 L.O.I.? 0.8 1.4 0.4 2.2 2.2 2.2
Total 99.95 100.46 98.86 100.20 100.37 98.66 S. G. 3.01 3-04 3-12 2.93 3.00 3.08 C, T tJ W N]or'm s
AP 0.24 0.24 0.34 0.22 0.36 0.17 IL 2.56 1.51 4.08 1.02 2.77 1.57 OR 0.42 5.43 1.16 0.55 1.34 8.12 AB 20.72 9.67 9.18 6.45 27.71 9.84 AN 31.13 34.77 35-73 42.96 24.66 29.33 C 0.00 0.00 0.00 0.00 0.00 0.00 MT 4.17 3.38 5.37 3-02 4.36 3.48 HM 0.00 0.00 0.00 0.00 0.00 C. 00 EN 13.48 17.65 8.20 21.25 7.18 6.23 FS 11.57 13-77 19-37 12.37 9-19 3-68 Q 0.00 4-38 5-09 8.21 0.00 0.00 DI 8.46 5-47 3.75 2.63 6.99 15.26 FG 0.47 0.00 0.00 0.00 3-17 8.75 FA 0.44 0.00 0.00 0.00 4.46 5.69 HE 6.34 3-72 7.72 1.34 7.80 7.87 RU 0.00 0.00 0.00 0.00 0.00 0.00 * Fc203 as total iron * Included in L.O.I, t Loss on Ignition ram;:.! r 78-11- 78-11- 78-11- 78-11- 78-11- 78-M- XiH.;b'. r 260 38 39 60 216 222 U/M1 J rv i P -~: i Da IT. re r j Calc-alk Calc-alk Calc-alk Calc-alk Calc-alk Kock Nome Amoco Andesite Rhyolite Rhyolite Dacite Pad t e U/G High Al High Al High Al S J 02 43.8 58.6 76.7 70.2 69.5 66.8 A1203 9.34 15.6 12.8 16.9 15.7 16.5 Fc203* 11.9 11.3 1.28 0.70 2.83 4.80 MgO 21.6 ^.68 1.18 0.35 0.72 1.94 CaO 8.02 2.88 1.25 1.27 3.70 1.40 Na20 0.00 4.46 0.00 4.23 3.62 4.02 K2O 0.00 0.81 5-63 4.22 0.46 1.53 Ti02 0.36 1.53 0.30 0.20 0.42 0.57 P205 0.11 0.37 0.08 0.07 0.07 0.16 MnO 0.16 0.14 0.06 0.01 0.05 0.05 C02+ 0.33 0.14 0.28 0.23 0.70 1.60 S+ 0.41 40.01 40.01 ^.01 0.02 0.05 L.O.I.? 4.9 1.0 1.6 0.5 3-0 3-0
Total 100.19 100.37 100.88 98.65 100.07 100.77 S. G. 2.99 2.80 2.65 2.62 2.70 2.67 C. I. P. W Norms
AP 0.27 0.87 0.19 0.17 0.17 0.38 IL 0.73 2.95 0.13 0.02 0.82 1.11 OR 0.06 4.86 33-54 25.43 2.81 9.28 AB 0.09 36.29 0.09 36.46 31.58 34.88 AN 26.95 12.04 5-72 5.95 18.46 6.05 C 0.00 3.08 4.64 3-29 2.77 6.22 MT 2.86 4.46 0.00 0.00 1.63 3.08 KM 0.00 0.00 1.29 0.71 0.85 0.00 EN 25-94 9.30 2.96 0.89 1.85 4.96 FS 7.11 9.03 0.00 0.00 0.00 2.00 Q 0.00 15.12 51.22 26.88 39.06 32.03 DI 9.33 0.00 0.00 0.00 0.00 0.00 FO 18.77 0.00 0.00 0.00 0.00 0.00 FA 5-67 0.00 0.00 0.00 0.00 0.00 HE 2.23 0.00 0.00 0.00 0.00 0.00 RU 0.00 0.00 0.23 0.19 0.00 0.00 * ro203 as total iron •4- Included in L.O.I. # Loss on Ignition l not Irvine and Barargar -Md-
Sni'vo 1 r- 78-11- 78-11- 78-11- 78-11- Yiif ' '- " 251 253 261 279
Irvin- 5. Barj-rcjar Thole Calc-alk Thole Calc-alk Hoc 1; '.Jir.ve Dacite Dacite Andesite Rhyolite High Al SiC2 62.6 66.7 80.4 73.0 /M 203 14.9 17.2 12.5 14.3 F e 203* 8.24 2.62 0.81 1.91 MgO 2.06 0.56 0.76 0.78 CaO 2.55 3.65 1.33 3-76 Na20 4.06 3.34 0.43 0.25 K20 1.30 1.08 2.58 2.87 Ti02 1.29 0.36 0.09 0.65 P2O5 0.22 0.10 0.06 0.23 MnO 0.13 0.05 0.02 0.13 C02+ 0.32 2.00 0.21 0.41 S+ ^.01 40.01 40.01 0.02 L. O.I. 2 2.4 2.4 1.5 2.0
Total 99.75 98.06 100.48 99.88 S. G. 2.74 2.67 2.71 2.74 C.I .P. W Norms
AP 0.53 0.24 0.14 0.55 IL 2.53 0.72 0.04 0.28 OR 7.94 6.68 15-58 17.34 AB 35.48 29-56 3.71 2.16 AN 11.58 18.26 6.33 17.52 C 2.79 4-33 6.86 4.59 MT 4.18 1.39 0.00 0.00 HM 0.00 0.99 0.83 1.95 EN 5.30 1.46 1.93 1.98 FS 4-97 0.00 0.00 0*00 Q 24.69 36.37 64-50 53-11 DI 0.00 0.00 0.00 0.00 FO 0.00 0.00 0.00 0.00 FA 0.00 0.00 0.00 0.00 HE 0.00 0.00 0.00 0.00 RU 0.00 0.00 0.07 0.51 * Fc203 as total iron + Included in L.O.I. # Loss on Ignition 28
Insert Photo U
Flows are rare and where they do occur they are coarse grained, recrystillized and resemole leucocratic amphibolites.
In thin section the oedding is generally obscure. The primary features are vaque and recrystallization is common. Sericite and muscovite are the common mica minerals. A potassium feldspar rich recrystalli^ei tuff, photo 5, is found in southeast Kenning Township.
Photo 5
Rival. A33A
The felsic to intermediate metavolcanics rocks that are interpreted to ae in Bradette, St. Laurent, Hurtuoise and Noseworthy Townships are presumed to overlie the mafic to intermediate netavolcanics and nos^ DUL to the west. Interbedded with them are mafic to intermediate metavolzanics, clastic ra eta sediment s and graphitic horizons. This unit 3aly outcrops in southern Bradette and western Noseworthy Townships and along the Turcotte River in northern Bradette Township. Diamond drill logsl (1 AajoooffieM riles H"s^earcli offigc t TorontOf tmta H and OJW-3SC aeromagnetic maps were used to interpret the extent of the unit.
A 3 1 e* t **e* t frk* fits** **k G ff at j Ter** f* , c/* /* 29
Fina grilled to cherty, aphanitic, well sorted, felsic tuffs are the preioffiiaeat rock types. They weather a pale butf colour, outcrops have i hackly appearance and quartz eyes are common. The fresh surfd3e is light grey and has a concoidal fracture. Bedding is difficult, to distingjish and the outcrops are often brecciated. A horizon of coarse grained, intermediate pyroclastic rocks is found along tae Burntbush Fiver and has been noted in diamond drill holes'! -4-1—i\gj s Ji5i si: t •Filoj lica-aroh Cffico, lasontoj—On t..) found on either side of tae river. The pyroclastic breccia is intermediate in coapDsitiDL and consists of matrix supported intermediate to felsic blocks in d tuff matrix. The clasts f consisting of flow and tuff m. a aatariai, are generally greater th^n 10 cm in sije out vary along the Lurutbusfl fcivar to lapilli size fragments. The more mafic the clast**? in composition the smaller its average size.
Fins graiiei, unsorted, well foliated, chloritizad intermediate tuffs are fouad along the Burntbush Biver in Noseworthy Township. They have a dart grey weathered surface and a greenish grey fresh surface. Flows are rare, however a porphyritic flow was seen along the BurntDush iivar near its mouth. It is pale green to dark green t with in5diua to coarse grained, euhedral feldspars and smaller quartz crystals as its phyric phase in a very fine grained matrix.
Ttie rDocs, when observed in thin section, are, commonly seen to be defonei sericite schists with minor chlorite and carbonate. They hava a cryptocrystalline groundmass, which forms 2C to 60 percent of . ^.. t-? i' * 30
* * the rock, consisting of sericite, caroonate, chlorite ar.d epidote enclosing coarser grained feldspar and quartz grains. Becrystdilization has almost completely destroyed all clastic ' * textures. 'LOWS H DLTOUii LAIIJ AfiCA G A The felsir to intermediate units in the northern supracrustal belt * are not exposed in outcrop and have been delineated using diamond drill nole logsl (1 AccogSTaar.r. Fi2gs Easiarch Office, Toeant^, OnLi") — c and DJ:i-3SC aaromagnetic maps. The oldest interpreted unit is ' intsrneaiate tuff, interbedded with mafic flows and graphitic sediasnts and is found at the core of the anticline north of Lower t Detour Line. Overlying the marie to intermediate metavolcanic unit is * the youaqer felsic to intermediate unit around Vandette and Dobson e. This unit consists of tuffs interbedded with mafic flows, i s and graphitic tuff s. and aodimontc. ainor gabtiro and ^ ultrandfic jodies were also encountered during diamond drilling 1. —H- Affg^iSiH^r^ Pilas -^sr?rrh riffler?, Toronta, Orit.). \ f A sin i la outcrop of bedded, fine grained, well sorted felsic to -t intBraeiiate tuff was seen north of Detour Lake. A chsrty^iruff was V found within the ore zone at the Amoco Canada Petroleum Company f^ Limit ad'si go Id prospect and a thin intermediate crJirstala tuff is interbedded with the mafic flows on the surface. i Cheii^ally all the felsic to intermediate metavolcanics are calc- alkaline laritas and rhyolites with minor tholeiitic dacite (Figures 31
2 and 3, Table 3) .
CLASTIC N3IASEDIHENTS
Clastic astasediments occur at three stratigraphic intervals within the map-area. The metasediments, called the Steele fletasediments by Lunijsrs (1^62) overlie the Steele Volcanics in the southwest corner of s ha jiap-area. The Scapa Metasediments (Lumbers, 1962, 1963) lie betvdsa tiie Aiair Volcanics and the Steele Volcanics in the south and are int-arprated to oe continuous around the western end of the folded nose Df tae southern belt of supracrustal rocks, and are found in nortnsrn Hoblitzel, Noseworthy and Bradette Townships. In the nortnara supracrustal belt, clastic metasediments are found jndarlyin^ and overlying the mafic to intermediate metavolcanics around Detour Lake. They are also interbedded with the aafic to intermediate and felsic to intermediate rocks as noted in diamond drill loqsl. -H— Aoo6actnont Files Pc-search Office,— Toeanto, —Oat* )-
liieral assemblages for the clastic metasediments8 are:
quartz * feldspar * biotite * muscovite * garnet
* quartz * feldspar * biotite * staurolite * silliianite
J- -2U-
Table 4:_Location of Samples taken for Chemical Analyses
Field Number Township/Area Latutude Longitude Lab No
78-11-19 Steele Tp. 49000'30 M 79054'50" 78-3711 78-11-72 Kenning Tp. 49016'50" 79053'00" 78-3715 78-11-83 NE of Hopper Lk. 50001'30" 79049'00" 78-3716 78-11-133 Steele Tp. 49001'20" 79056'00" 78-3717 78-11-233 Hurtubise Tp. 49023'35" 79047'20" 78-3720 78-11-234 St. Laurent Tp. 49024'45 M 79 040'00" 78-3721 78-11-237 St. Laurent Tp. 49020'40" 79031'05 M 78-3722 78-11-258 Amoco U/G 50000'50" 79042'25" 78-3726 78-11-277 N of Detour L. 49057'10" 79043'10" 78-3730 78-11-357 Abbotsford Tp. 49004'10" 79043'30" 78-3732
78-11-38 Abbotsford Tp. 49008'00" 79045'45 M 78-3712 78-11-39 Abbotsford Tp. 49007'55 M 79045'25 M 78-3713 78-11-60 Kenning Tp. 49012'02" 79 054'40 H 78-3714 78-11-216 Bradette Tp. 49027'30" 79034'40" 78-3718 78-11-222 Bradette Tp. 49031'50" 79032'00" 78-3719 78-11-251 Noseworthy Tp. 49 029 f 13" 79050'35" 78-3723 78-11-253 Noseworthy Tp. 49028 I 41" 79050'40" 78-3724 78-11-261 Amoco U/G 50000 f 50" 79042'25 tf 78-3729 78-11-279 N. of Detour L. 49056'50" 79043'05" 78-3731
78-11-257 Lower Detour L. 49056'00" 79037'30 M 78-3725 78-11-259 Amoco U/G 50000'50" 79 042'25" 78-3727 78-11-260 Amoco U/G 50000'50 M 79042'25" 78-3728 32 quartz * biotite * chlorite * garnet * muscovite * hornblende
The metamorphic grade is highest next to the intermediate to felsic intrusive rocks. In the less metamorphosed sediments primary textures, such as graded oedding, cross oedding and load casts are well preserved. The predominant lithologic type are turbidite wackes vith linor calc-silicate beds, schists, arenites and arkoses. Fine grainad and graphitic horizons rarely outcrop but are described in diamond drill logsl. (1 AaasssmGnt Filco Qaseageh Qffijg, Ta
I n e turoiiite wackes that occur in the Steele Betasediments and Scapa ftetaseiiments are similar in appearance. They have a orownish grey to light grey weathered surface and a grey fresh surface. Wacke with graded beds contain a ^narrow zone of phyllite at the top of individaal oeis which range in thickness from 6 mm to 8-12 cm. A few beds ire 30 to 60 cm thick. Massive non-bedded wacke is less common thai the graded variety. The divisions within the Bouma Cycle (Walker, 1976) that were seen within the map-area are, in decreasing order, A, AE S ACE. Sedimentary structures such as cross bedding 6) and load casts (Photo 7) are not common. In photo 6 there are cross beds and ripples; the top of the pen points south which is o the younging direction. Photo 7 is of a flame-like loadcast forcing its wiy through an overlying pelitic bed. The high relief, boudined bed isdTa calc-silicate bed. 33
Insert PhDtos 6 and 7
Between the Steele Volcanics and the Case batholith the sediments have been metamorphosed to garnet and staurolite schists. All sedimentary structures are gone and the rocks are garnetiferous chlorita-oiotite-feldspar-quart z schist; biotite-muscovite-feldspar -quirtz schist and quartz-plagioclase-garnet-biotite-staurolite scnist. Porphroblastic biotite, up to 6 mm in size, is found within the less metamorphosed wackes. These wackes are composed of biotite, * feldspar, quartz, sericite and accessory amounts of chlorite* rock fragments, epidote and sphere.
A narrow contact aureole, 91 m to 200 m vide occurs vithin the sediments bordering the Scapa stock in northwestern Scapa Township. Two zones can be distinguished within the aureole: an outer garnet zone rfhich grades away from the stock over a distance of 200 m; and an inner zone of hornfels about 90 m wide which grades into the granite. For further detail see Lumbers (1962, p.17).
Hitain the wackes, thin calc-silicate beds occur and are described by Lumoers (1962) .
"Calc-silicate rocks occur as narrow layers intercalated with the metamorphosed greywackes. The layers range in thickness from less than 1 inch to 6 inches and are traceable for considerable distances in the outcrop. A few layers pinch and swell along strike, but I 3U i uniformity of thickness is the rule. i Tne calc-silicate layers are similar to those described by Pettijohn I (1943, p.1846-47) from the Thunder Lake area of Ontario and called by him hornblende granulite. In hand specimen the rock resembles diorite vita naaarous needles of greenish amphibole scattered in a fine l grained, light-coloured matrix. The rock weathers a buff colour but is lignt grey on a fresh surface. In thin-section the layers are composed Df a granoblastic matrix of quartz, calcic plagioclase, and epidote la which there are randomly oriented rosettes and sheaves of r filua-graea amphibole. The plagioclase is commonly clouded by sericite, t x making its determination difficult, out it appears to be near fc andesine in composition. Sphene, pyrrhotite, and carbonate are common accessory minerals. Some specimens contain small amounts of garnet." i
* betrfaaa tae Steele Volcanics and Case Lake minor interbeds of arenite and grit occur within the wackes. The arenites are thin beds which are ligatsr in colour and cleaner in composition than the wackes. The t qrit is composed of lithic fragments between 2-4 mm in size. In iiobliczel Township along the Hikwam Biver, arkoses have been mapped during operation Kapuskasing (Bennett et al. 1967) and if they are S similar to those seen by Lumbers (1962) they contain predominantly quartz and feldspar, in egual amounts.
fc Fine graiaed tetasediments were seen along the Burntbush Biver in Noseworthy and Hoblitzel Townships and are described in many diamond 35 drill logs. Wiere seen ay the author they were silt size, well foliated and occurred in 1-2 cai cross bedded beds. Graphitic sediments and tuffs were not seen in outcrop but vere noted in diamond drill logs^J 02 "The term ironstone is used h^ee as defined in the unpublished classification manual of thepirtario Geological Surve/, issued 1978: a chemibal sedimjwfCary rock that contains 33 percent or more of the comaioflr^rroXminerals by volume. This definition excludes^-other chemically precipitated sediments such as chert, aaJk-tffastic sedimentary material, ^hat are commonly iteriayered with ironstone. 11).
Hi t..! ID tas Jase Batholith xenoliths of granoblastic metasediments are common. In the north part of the map area a large "stoped" block of letisadiments is outlined. These outcrops and the metasedimentary outcrops north of Detour Lake were not visited by the author and as sucn their nature is unknown. From diamond drill hole information! -H Afficaismant Files,—FPionrrR? officoi Toronto, Ont.K. most of the metdsediiants in the north are wackes or schists.
CdElllCAL HEIASEDIflENTS
The chemical metasediments, consisting of ironstone2 i(2 "The term " ironstone is used here as defined in the unpublished classification manual of the Ontario Geological Survey 9 issued 1978: a chemical sedimentary rock that contains 33 percent or more of the common ir minerals by volume. This definition excludes other chemically
J. P 36 precipitated sediments such as chert, and clastic sedimentary] material, that are commonly interlayered with ironstone. w )[ and chert crop out in the southeast corner of Kenning Township and along the Kabika River. Aeromagnetic anomalies interpreted to be caused by ironstone-rich metasediments are found in the Adair Volcanics in AoDJtsfjri Township; the clastic metasediments and mafic to intern-idiate metavolcanics in Kenning Township; the mafic to iataraadiita letavolcanics in HurtuDise and St. Laurent Township; the met-tsaiimsnts and felsic to intermediate metavolcanics in Bradette lawnsaip, and the metavolcanics just west of Vandette Lake.
Xhs ironstones, argillites and cherts are interbedded in 2*10 mm bads whicn occar in ironstone rich units up to 60 cm thick. Interbedded with those ironstone rich units are units of thinnly, interbedded garnetiferous wacke, very fine grained sediments, chert and minor ironstone. Non-iron rich wacke, chert or argillite beds can be up to 15 cm taick. The richest portion of the iron rich metasediments occurs it the nose of a fold (indicated on the map by the number 4) and is 727 m lonq S 61 m wide. The rest of the outcrops contain small lenticular ironstone rich pods. Bedding is contorted and minor faulting common.
The clastic metasediments associated with the chemical metasediments are garaatiferous and recrystalized. A thick horizon of cherty tuff was found on one outcrop and was separating two iron rich pods. 37
aAFic AND ULTRAMAFIC INTRUSIVE ROCKS
The metamorphosed mafic and ultramafic intrusive rocks consist of gaboros, amphibolites, feeder dykes and sills and ultramafic roc K s. Ihe ultrdffldf ics are not exposed on the surface. Underground at the A m o r o C-inddd Petroleum Coe pan y Limited's gold prospect an amphibole -chlorite schist with komatiitic affinities is associated with the ore 43d/. The gabDros occur as small concordant and discordant bodies in tha mafic to intermediate metavolcanics in the northern supr asrustdl oelt. Possible gaboroic intrusive bodies are hy yjth es ized for the Steele Volcanics jjut the extent of the Drpfiism and recrystallization precludes easy recognition of such A ies. Lie aiphiDolites are exposed in the netasedinents of Scafvf? aip ini south-southwest of Detour Lake. The mafic feeder dykes are i D and underground at the Amoco prospect, in the felsic to intsraeiii te metd volcanics southeast of Abbotsford Lake and in the Scapa Hetisediments.
ihe cDotiBou mineral assemDlages for the rocks are:
ttetagaouro
chlorite * feldspar * hornblende * biotite * epidote * carbonate
' Ultraidfi: UT 38
* tremolite * chlorite * opaques
S Feeder dyice i
chlorite * feldspar * carbonate * ouscovite * epidote 9
C Amphibolite t hornblende * feldspar * epidote * quartz * biotite * carbonate
*rr
The qiD^ro oolies, where exposed, are generally small, discrete entities our small dyklets are associated with the netavolcanics west of Suriddy Like. They are medium grained* equigranular, crystalline, iudssiye .to foliated with a dark green weathered surface and a dark qrey qraea frash surface. Epidote veins are common as well as quartz veins. Tha porphyritic body west of Sunday Lake has 1-20 percent phei*o^ryst3 that vary in size from U-10 mm. The gabbro found along the snore of Lower Detour Lake is fine to medium grained with coarse qrained portions. The foliated portions are chloritic while the massive portions contain amphiboles. The outcrop on the south shore l of Lorfer Detoar Lake contains secondary quartz eyes Danded into ^ quartz rish (15-25 percent) and quartz poor (less than 10 percent) zones.
^ The di pnioelites found south-south west of Detour Lake are coarse qrainad, massive, dark green on weathered and dark green-black on l 39 i fresn sarfa-ss. Recrystdllization is such thdt feldspars are starting to form discrete bands. The amphibolites in Scapa Township vara sean and described by Lumbers (1962) . l "AmDhibolite, derived by metamorphism from gabbro and diabase, is the most aounldnt rock type of the basic intrusions. The amphiaolites are l compose! 3f UO-65 percent alue-green hornolende, set in a fine t. r qrainsd groundmass of epidote, guart2r, and feldspar. Relict laths of plagioclase up to 1 millimetre long are present, and where these are i i aounddnt tne rock shows ophitic texture. Biotite and caroonate are comno.1, aad altered magnet i t e- ilmenite is an accessory mineral. a is rare.
Ihere is evidence of multiple intrusions of the sill-or dike-like bodies at many localities. The best example of multiple intrusion is l in a rfell-expDsed outcrop at the east boundary of Scapa township. here, a matagabbroic sill, about 1C feet wide, showing chilled contacts against the metasediments, is intruded by irregular dikes of a S2C)ni aetaqabbroic rock, ranging from 1/2 inch to U feet wide, which display chilled margins against the sill. Disseminated pyrite, pyrrhotite, and chalcopyrite are found at the contact between the two l FOCUS. lf
I The mafic feeder dykes, where recognized, are fine grained, dense, i dark gray on rf eat her ed surface and dark green on fresh surface. They have chilled margins and irregular contacts with the host rock. rnono l
Mafic to intermediate feldspar porphyry flow found in the southeast corner of Abbotsford Township just north of the sedimentary-volcanic contact. * uo l - FELSIA TO INTERMEDIATE INTRUSIVE BOCKS l
* The a2tavolcaaic-metasediffientary sequence has been intruded by felsic to intermediate bodies that compose about 50 percent of the map-area. In t ne southern half of the area these intrusive bodies have been 9 a- * called: the Case batholith; the Mistawak batholith; the Patten River f *t pluton; tae Bateman Lake pluton; the Hurtubise stock and the Scapa l stock. lae major intrusive bodies/body separating the northern and ** soutaera supracrustals have not been named. The intrusive rocks have beer, classified according to Ayres (1972).
S. CASS uil'dDLITH i Ihe Case batholith is found in the southwest portion of the map area C and is bounded by the Scapa Ketasediments, Adair and Steele Volcanics m and is open to the west. Lumbers (1962) has given a detailed ^ description of that portion of the intrusive found in Steele Township C and his description is valid for the exposures seen by the author.
6 T "Within St eel* township the rocks comprising the batholith range in * composition from leucogranodiorite near the contact vith the Scapa Hetasedimants, to leucocratic guart^ monzonite farther away from the Scapa Metasediments. The rocks are pink in colour, massive and * coarse-qrainei. Numerous pegmatite dikes and irregular pegmatitic . patches occur in the granodiorites and quartz monzonites.
9 t 01 l A pegiitite dike occurring in quartz DO D zonite, in lot 5, concession V, Steele township, contains spodumene, colambite-tantalite, and i molybdenite. Pegmatites occurring in the metasediments and s near the contact with the Case batholith, in lots 8-12, concession IV, Steele township commonly contain scattered plates of i moiy odenite, but no spodumene cr columbite- tantalite was found in thea.
J ^uartz-fsldspar porphyry dikes and feldspar porphyry dikes are auundint in the Scapa fletasediments both in Steele and Scapa townsnitjs; a few also occur in the Steele Volcanics. The porphyry diK35 striKe parallel to the regional structure; they differ from the porph/r/ dikes associated with the Sargeant batholith in containing aim;.dint potash feldspar and rare accessory rutile.
The composition of the granodiorite is about 50-55 percent plagioclase (An2b) , 15-25 percent guarti, 7-15 percent potash feliopar, aid accessory epidote, muscovite, biotite, chlorite, sphene, zircon, apatite, tourmaline, and rare opaque minerals. The percentages of potash feldspar were estimated from stained specimens.
Some of the qranodiorites are porphyritic, containing large pheaocrysts of plagioclase.
The cDfflposition of the quartz monzonite is about 25-35 percent (An25-28), 30-40 percent potash feldspar, 25-35 percent quartz, and accessory muscovite, biotite, chlorite, apatite, zircon, i and opaque minerals. As in the case of granodiorite, the percentage E of potash feldspar was estimated from stained specimens. i homogeusois hybrid rocks occur in places within the batholith, particularly at or near the contact with the Scapa Metasediments. All tae hyorii rocks are porphyroblastic, and they contain no potash feldspar. Taey are essentially .quartz-plagioclase rocks, but all have I minor bi ua-greer. hornblende and greenish brown biotite.
r t Ida cDJiposition of the hybrid rocks is about 55-70 percent i plagioclase (\n28-32), 15-20 percent quartz, 10-12 percent biotite, 2-6 par-eat hornblende, and accessory chlorite, sphene, apatite, and epidote (pistacite with cores of allanite).
Inclusions of partly assimilated metasediments are commonly i associated with the hyorid rocks, and it would appear that the hybrid ! rocss owe thair origin to the mixing of sedimentary material with the "maqma" of the batholith.
* No detailed study was made of the pegmatites, although special attsntian was given to those containing minerals of economic significance. The pegmatites vary widely in size and shape; some are l taoalar or dike-like in form, others are irregular. The pegmatite diK3s occurring within the batholith range in width from less than 1 l l 3M2tg*g****l^-^-^•V.^'^WV*- *~ **
Photo 2 Autoclastic (pillow) breccia found in the amphibolitic mafic flows in the southeast corner of Hurtubise Township Note the carbonate cemented breccia in the cove of the pillow. E
™ inch to about 1CC feet. Many of the dikes have sharp contacts suggesting intrusion into the host rocks (granodiorite and quartz monzonite) . In thin section, the rock adjacent to the dikes is ' invariaoly- fractured and embayed by aplitic material, which commonly forms a oorder phase of \the pegmatites.
* The origin of the irregular pegmatitic bodies is unknown. Both the irrsgjlir masses and dikes of pegmatite are more or less evenly distrioated throughout the Case batholith in Steele township. The 9 largest dikes were found near the contact with the Scapa Metdsedimants. 2
' The cDntci3t between the pegmatite and aplite is gradational. The border phase is commonly scalloped and contains trains of garnet. Hexagonal quartz crystals and plates of muscovite up to 2 inches in ) size are conspicuous constituents of the pegmatites in hand specimen.
l The spodumene-bearing pegmatite dike occurring in lot 5, concession } V, steele township, is complex and zoned. This is the only complex pegiatita notsd within the batholith. The pegmatite displays a narrow aplitic border phase in places and contains numerous quartz-rich * pat-has, which appear to form the core of the pegmatite. Spodumene crystals, up to 3 feet long and 6 inches across, are most abundant in the qaartz-rich patches. Columbite-tantalite, muscovite, and * tourmaline ars found with the spodumene. Molybdenite is rare. l au i Pegmatites occurring in the Steele Volcanics and Steele Metasediments in the vicinity of lots 7-11, concession IV, Steele township, are composed largely of coarse quartz with only minor amounts of feldspar * and mica. Holybdenite is sparsely distributed in these pegmatites, commonly in association with aplitic and feldspathic portions of the pegmatite. "
KISI&WArC BAIHDLITH
The aistawa*. batholith is uanded by the metasediients - cs; in Kenning Township on the west, in Hurtubise and St. * s Laureat r^wasaip/ton the north, in Adair and Abbotsford Townships on f the south and is open to the east. Lumbers (1963) has given a derailed description of the southern portion of the batholith which coincides with what the author saw in the north and west portions. i "Leicocratic quartz monzonite and granodiorite predominate in the batholith as exposed in the map-area. Outcrops of quartz monzonite f are pink to greyish-pink on a fresh surface, and light pink on a weathered surface. Biotite and epidote are the main mafic minerals, although amphibole is abundant in quartz monzonite exposed on the C north shore of Joe Lake. The granodiorite is grey on a fresh surface, and grey with a slight green or pink tint on a weathered surface. Biotite aa d amphibole are common mafic constituents. Hevatitized m 9 •l quartz is common in both quartz monzonite and -granodiorite; both . lithologic*! types are medium- to almost coarse-grained, even-grained t % l * to porphyritic, and massive to veil-foliated. Elongate, dark green, . lafic-rich inclusions, commonly less than 2 inches long, are aligned l parallel to the foliation in many granodiorites but are care in * quartz aonzonites. Dikes and irregular masses of both lithologic*?* types cat one another in most outcrops, but the relationship of the quartz aoazonite to the granodiorite is unknown. i Table 5 shows nodal analyses of nine typical quartz monzonites and two granodiorites. Plagioclase ranges in composition from about An23 t in quirtz monzonite to An28 in granodiorite. The plagioclase is comaonly zoned, twinned, and moderately to highly altered to sericite, zoisite, and cuscovite. Potash feldspar is fresh to r 5 f l slightly Altered; it displays/Steotch-plaid twinning, and sone is perthitic. A few medium-grained, subhedral potash feldspar grains, containing euhedral plagioclase inclusions; appear in quartz i monzonite. Host of the potash feldspar forms fine-grained anhedral patzrhesy interstitial to plagioclase, and myrmekitic intargrowths of quartz and feldspar are common at the junction of potash feldspar and ' plagioclase grains. Albite has partly replaced potash feldspar in many Df the rocks examined.
1 Quartz is comionly strained and in some specimens fractured. Biotite has a greenish pleochroism and is partly altered to chlorite. The epiioce present in the quartz monzonite and granodiorite is 1 pistacite, rarely with a core of allanite, which generally is present in cljstecs with biotite. Accessory minerals are zircon, apatite, Photo 3 Classic example of pillowed flows. Found north of Detour Lake. I
* 46
9 sphene, amphibole, and pyrite.
* Sranite pegmatite, aplite, felsite, granitic gneiss, and ainor v porphyry i ile a s constitute the remainder of the rocks associated with the batholith. Pegmatite and aplite are found as dikes, commonly ess V A than S ia-hes wide, in most outcrops of quartz monzonite and 9 granodiorite. A few small magnetite crystals were found in pegmatite near the southwestern edge ot Adair Hill. 9
* Fine-graiaed, buff to pink coloured felsite, as dikes and irregular ^ patches, rf as mapped in the vicinity of Joe Lake. The rocks are 9 associated with granitic gneiss, and they cut the Adair Volcanic P Rocks exposed on the south shore of Joe Lake. At this same locality, narrow feldspar porphyry and quartz-feldspar porphyry dikes also cut the Adair Volcanic Bocks. The porphyries are rocks weathering pink to * white, with prominent feldspar and glassy guartz in a fine grained qroaaimass. Some porphyries contain minor disseminated pyrite.
P Granitic gneiss is best exposed on the northeast shore of Joe Lake. The gneisses ire grey, fine to medium-grained rocks, consisting of layers rich in guartz, plagioclase, and potash feldspar, which ' alternate with layers rich in biotite, pistacite, and minor pyrite. The thickness of the layers ranges between a few millimetres and 1/4 inch; in many places they are lens-shaped and discontinuous. In ) places the gneisses contain porphyroblasts of plagioclase up to 4 milliietres wide. Granitic gneiss, consisting of mixei granodiorite, * quartz monzonite, and mafic-rich material, is found at the Forestry cawin naar the foot of Adair Hill, and aoout 1 mile west of the i H cabin, 3n the Adair tower road. l Insart Table 5
PLUTON l Ine r'lttaa aiver Pluton in southeast Adair Township acd northeast l uepourn iDwaship was not visited by this field party but has been described oy Lumoers (1963).
* "Covering an area of aoout 21 square miles, the Patten River Pluton r P is oest exposed in Perron /township in the province of Quebec. A western lobe of the pluton, comprising about 7 square miles, extends * acrDss tna Interprovincial Boundary into the northeast corner of r hepourn and the southeast corner of Adair townships. The part of the l r plat Da in Perron township has Leen described oy Mawdsley (1930, ^ p.47o and remapped by Flaherty (1939).
l Witnia tne map-area, the pluton is poorly exposed, and except for its ' north contact, the boundary of the mass could not be precisely locitad. flost outcrops consist of a massive medium to coarse-grained leucoqraaodiorite, weathering pinkish-grey, which in places is k ' ' porphyritic. Coarse-grained quartz, pink and grey feldspar, greenish biotite, and epidote are the principal minerals seen in the field. ' Ud
T k N2ac the northern margin of the batholith in Adair -township, the granodiorite is markedly foliated, and in places crushed and granulated forming augen gneiss. Gneissosity and foliation of the t granodiorite parallels the northern contact and the foliation of the Adair Volcanic Rocks.
* HDdai analyses of two massive leucogranodiorites are shown in Table i 6. Alaite and oligoclase grains are present in sample L-132. Oli-jDcrlise (An17-22) is found as finely twinned subhedral to anhedral
rv . qrains up to 6 millimetres wide, and in many places shows some zoning. Albite (An5-7) is commonly untwinned, intricately zoned, and ^ is present in subhedral to anhedral grains with about the same grain n 's diameters as oligoclase. Friedlaender (1952) noted the coexistence of p albite and oligoclase in litchfieldite from the Blue {fountains, * Dntirio, out reports of other similiar findings are rare. Coexistence 't- of albite and oligoclase in the same rock may be due to unmixing of ^ low temperature oligoclase as suggested by Laves (195U). b i~ Potash feldspar and some quartz are interstitial to plagioclase; much r of the quartz is present as large grains up to 3 millimetres.wide. K Potash feldspar, in places perthitic, is rarely altered and shows pt * fe /cotch-plaid twinning typical of microcline. Biotite, epidote . (pisticrita), md rare chlorite are associated with altered dark green C amphibole. Accessory minerals are sphene, zircon, pyrite, and v apatite. e i l DiA.es ranging from less than 1 foot to 1CC feet vide, and consisting miin ly of foliated granodiorite with some aplite, granite pegmatite, and rira feldspar porphyry, are found in the Adair Volcanic Rocks up to 353 rest north of the north contact of the Patten River Pluton. Soma of taese granodiorite and pegmatite-aplite dikes are contorted, of Doadinige form, and concordant with the Adair Volcanic Rocks, Foliation in the Adair Volcanic Rocks is locally contorted in the vicinity of the dikes.
F.ara quirtz-feldspar porphyry and felsite dikes were napped in the Adair Volcanic Rocks in the vicinity of Portage Hill* lo uriefiy summarize, mapping of the Patten River Pluton, both in Gntario and Quebec, indicates the presence of a moderately to intensely foliated border phase adjacent to the surrounding matavolcaaiss. In places along the north and east contacts, foliation and gneissosity are due to crushing and dip vertically to 45 degrees towaris tke centre of the pluton. The core and interior parts of the pluton are poorly exposed, but available data suggest that these parts are massive. Where the pluton is bordered by basic metavolcaniss, numerous lens-shaped inclusions and hybrid rocks exist in c ne pluton adjacent to the contact; but where it is bordered by acid aetavolcanics, inclusions and hybrid rocks are apparently lacking. Granitic, aplitic, and pegmatitic dikes are common in the surrojndiag matavolcanics up to 1/2 mile from the contact. In places along tae north contact in Adair township, these dikes are deformed." -tl*
*r-:g**^(-~®S?f.-i?:/^^g^p?*~'.;-- If.-j,,* ;.;, - .: j.-s
?;;rr^^te^L^^:;N y Photo 4 White, eutaxitic rhyolite tuff, tectanically interfingered with the darker intermediate tuff. Found east—southeast of Abbotsford Lake.
Photo 5
Photomicrograph of a felsic, recrystafrized tuff, sample from the southeast corner of Kenning Township. 50
Insert Table 5
BATEMAN LAK2 PLUTON
The eastern end of the Bateman Lake Pluton is centered on Payntouk Lake in eastern Tomlinson Township. The author was unable to examine these outcrops but Wilson (1979) visited the pluton and the following is his description. * "Outcrops of massive to weakly foliated granitic rocks occur through out tne map-area. Weathered surfaces are white to light pink and t fresh specimens are light to medium pink. The rocks are predominantly equigranular with grain sizes averaging from 1 to 3 ma. Locally, the rocits are porphyritic with up to 5 percent potassic feldspar l phe&D^rysts as large as 1 cm. An average composition of 22 percent quartz, 5u percent plagioclase, 17 percent potassic feldspar, and 7 perssat dark and accessory minerals for the rock was obtained by I psiat CDaating stained hand specimens. Thin sections reveal the accessory minerals to be chlorite, biotite, apatite, epidote, sphene and apa-jue minerals. Plagioclase determinations on two sections give ^ a valje of An22."
C HUEIU3ISE STOCK fl m Ihe troadhjemitic Hurtubise stock is found in the southwest corner of c C 5 51 r o hurtubise Township tind has very little outcrop exposure. The trondhjemite is medium grained, massive, crystalline vith a whiteish v grey weatherei surface and a grey fresh surface. A slab of the ^ * troadhjemite stained uy the author, containi&f 55 percent
* plagioclase, 35 percent guartz, 6 percent potassium feldspar and 4 percent biotite. )
SCAPA STOCK ?
T J-8-hi Scapa stock is a pink granite intruding the Scapa Metasediaents in the northw?st corner of Scapa Township. It is medium grained, uniform and pink in appearance. The composition is about 40-45 perceat potassium feldspar, 25 percent plagioclase, 20-25 percent quartz, 6-10 percent biotite and accessory muscovite, chlorite, j epidote, sphene, zircon and opaque minerals.
The remaining unnamed guartz-monzonite oatholith separates the northara and southern supracrustal DeIts. outcrop is scarce but, except for contact areas, the composition appears uniform throughout. The rock is salmon pink on both weathered and fresh surfaces. It is massive, medium grained, crystalline and composed of approximately 3D percent plagioclase, 30 percent potassium feldspar, 25 percent guartz and 5 percent biotite, flinor pegmatite lenses have been found within the bitholith.
A small intrusive plug on the east side of Hopper Lake is composed of l 52
* quartz iiorita. It is coarse grained to very coarse grained, equigranular to porphyritic and massive with little shear planes seen throughout. In the porphyritic variety feldspar crystals up to 1 cm are seen. The mafic minerals are biotite and hornblende and compose up to (O percent of the rock. The ratio of hornblende to biotite varies from predominantly hornblende to predominantly biotite with all possible combinations in between. Zoned plagioclase were recognized from weathering patterns in the crystals.
w TD INTERaEDIATE INTRUSIVE ROCKS
The au fie to intermediate intrusive rocks are not common in the •ap-area. The diorite body that is found around Detour Lake was deduced, primarily* by using ODH-GSC aeromagnetic maps and a limited numoer of outcrops. The diorite outcropping along the Patten River in St. Laurent Township is interpreted to be of limited extend and may be a phase of the Histawak Batholith.
The Detour Lake diorite is mesocratic, coarse grained, inequigranular, crystalline and massive. It has a salt and pepper fresh surface and a dark grey weathered surface. The mafic component consists of approximately 60 percent hornblende and biotite in almost equal amounts. The rest of the rock is composed of 35 percent plagioclase xf(An22) and 5 percent quartz. A leucocratic hornblende diorite to monzonite phase was found within the diorite.
9 C l 53
* Tne si ail diorite plug on the Patten River is coarser grained than the Detour Lake diorite. The outcrop is leucocratic and contains Idr^e rafted xenoliths of nafic metavolcanic rocks, photo 8. This * Massive crystalline diorite contains 65 percent plagioclase, 30 percent comoined amphibole and biotite and 2 percent quartz. The hornDlendas have chloritic alteration rims. 6 Insert Photo 8 i*
? L&I2 PE^CittflBIAN (PROTEROZOIC)
K A FI C I J la Di I VE ROCKS
CUAfilZ DIABASE
Quartz iidOdsa dykes are found throughout the area but are not cannon. Lxcept for the long, sinuous northeast trending dyke in the south pirt of the area, all the exposed dykes trend approximately north. Fahrig et al. (1965) have dated north trending dykes at 2485 million yaars and northeast trending dykes at 1230 million years for this part of the Abitibi Belt. Both the northeast and north trending ' dykas are identical in appearance*
) The ifkas havs no magnetic expression and cannot be traced beyond the ' immediate outcrop area on which they are found. They are medium grainad, massive, equigranular and crystalline. They weather the 9 l 54 f *- characteristic reddish Drown of diabase and have a black fresh surrace. The quartz diabases contain labradorite (An50) in fc e micrographic intergrovths with quartz, Photo 9; the plagioclase is A ~ ophiticilly intergrown with euhedral to subhedral augite. The dykes ^ are unaltered and unmetamorphosed. jr
Insert Photo 9.
* j SIEATIJEAPdY
-i
The stratigraphic succession proposed for the lap-area is, by necessity largely interpretive. A basic assumption was made and all structural interpretations are based on it. The assumption was that, . in the southern belt, the mafic to intermediate metavolcanics near the 33ULh margin of the Mistawafc batholith formei the base of the : volcaaij sequance and the felsic to intermediate metavolcanics overlie them and the clastic metasediments overlie both metavolcanic types, in the northern belt it was assumed that the complex, mafic to intermediate, felsic to intermediate iss and metasediments overlie the exposed mafic to intermediate meta/ volcanics.
In the southern supracrustal belt the possibility for two basal mafic to intermediate metavolcanic sequences exists. The Adair Volcanics have interdigitated mafic to intermediate and felsic to intermediate which pinch out to the northwest or become t
I - * - , 55
* interfinqared with the clastic metasediments; this comprises one * metavDlcaaic sequence. The other sequence is found to the north of i the tfistarfa*. batholith where the mafic to intermediate metavolcanics, B wita iiaor interbedded felsic to intermediate metavolcanics is overlain oy felsic to intermediate pyroclastic with minor interbedded v mafic to intermediate metavolcanics and metasediments. In the western 5 part Df the map sheet the felsic to intermediate metavolcanics have dissaapearei and the mdfic to intermediate metavolcanics are overlain t Dy clastic metasediments.
R
In th? northern supracrustal belt the Dase of the sequence appears to be felsic to intermediate tuffs with minor interbedded mafic to i intermediate metavolcanics and metasediments. Overlying this is a predominantly metdsedimentary horizon with interbedded mafic to intenediate and felsic to intermediate metavolcanics. The * aetasediments are overlain by the mafic to intermediate metdvoljdnics, interbedded felsic to intermediate tuffs and ultramafic r orks. The unexposed complexly interbedded felsic to ' intermediate, mafic to intermediate metavolcanics and metasediments overlies the mafic to intermediate flows* Also overlying the flows, i in the northwest are metasediments and mafic to intermediate flows ' which may be the lateral equivalent of the complex unit.
l PHANEROZOIC
CSZJDZDIC 56
I PLEISTOCENE l The Pleistocene geology of the map-area has been previously mapped on f a reconnaissance scale by A.N. Boissonneau (1965). In addition to his 6 Pleistocene map there is a supplementary report Utoissonneau, 1966). 9 (1962, 1963) in the course of his work in the southern i- portion of the map-area descrioed in detail the glacial deposits.
The depth of the Pleistocene overburden varies a great deal within l the area aapped by the author. A maximum overburden depth of 53 m has beea recorded in diamond drill holes (Assessment Files, Research i Office, Toronto). Figure U is a compilation of the depth of E Dvecuariea measured in the diamond drill holes plotted on the 0 geological map (back pocket). The ground surface is a gently rolling till mi lacustrine plain and as such the great variability in the C depth of overourden indicates a variable bedrock topography. t Slaciil distory e The first advance of the Wisconsin ice over the map-area vas in a southeast direction and a sandy till was deposited (Boissonneau, v 1966). This till has not been described within the map-area. This ice ^ mass had withdrawn from much of the area by 8,UOO years B.P.1 (1 D.P. m -l 8-fi - tit f*** Prest* l- r
C 57
* '* 33f3ra flrgagat) (Prest, 1970). As the ice withdrew a proglacial lake developed between the Atlantic-Hudson Bay height of land and the ice front. The proglacial lake is known as Lake Barlow-0jibway and A ' varved jlays, silt and fine sands were deposited from it and underlie most Df the map-area (Prest, 1970; Boissonneau, 1966). These glaciolacustrine deposits are only exposed in the south portion of l the map-area and are covered by the Cochrane till in the north (see Figure 5). As this first ice front withdrew, subglacial streams developed within the ice sneet and eskers were formed. Kettle depressi aa s, some of which form lakes, were formed within the eskers whea ouried stagnant blocks of ice melted.
I About 8100 years B. P. (Prest, 1970) the second phase of the Cochrane realvanca covered the northern 85 percent of the map-area (Figure 5) . 1 i* This readvance modified and capped the eskers and Lake Barlow-0 jibway l lacustrine deposits with a clayey till (Cochrane Lake) and molded drumlinoid landforms with southeast orientations (Boissonneau, 1966). i Retreat of this ice mass was rapid and no extensive lake was formed . during the post Cochrane phase (Boissonneau, 1966). The map area was completely free of ice by 7800 years B. P. (Prest, 1970).
OF ICE BOVSflENT
Striations found on water washed outcrops throughout the area indicate a southeast trend to the movement of the Wisconsin ice sheet. The Cochrane readvance over-rode the glaciolacustrine deposits Photo 6 Crossbedding and ripple marks found in finegrained wackes southeast of the Scapa stock.
Photo 7 Lead casts with a flame-like shape in the wackes southeast of the Scapa stock. Note foliation is oblique to the bedding. 53
of Lake Barlow-0jibway and built drumlinoid features which also have a southeast trend indicating movement in that direction.
SLAC1AL DEPOSITS
V CDCJEiNS TILL
The Cochrane till which covers 85 percent of the map-area is a stratiqraahic unit recognized over a considerable area (Prest, 1970). r Prest (1970) describes the Cochrane till as seen throughout its entire extent. v "The typical Cochrane till is a stone-poor, blue-grey clay till that rests oa varved sediments. It takes on a very pale pinkish tint when t B weathered, and is a yellow-brown when oxidized, ^eing calcareous, it E contrasts markedly with the older, sandy, and non-calcareous tills of the Timmins-Cochrane region (Hughes, 1965). The clayey character of the till is believed to be due mainly to the incorporation of lake E clays as the Cochrane ice advanced southward." p- Drumlinoid landforms and flutings are glacial features in the E Cochrane till that were molded by the ice mass of the Cochrane readvance. Typical drumlinoid features are about 1.6 km long by 530 m wide md rise only about 3 m above their surroundings. (Boissonneau, v 1966). Similar features within the present map-area are much longer . and tend to be narrower. Larger drumlins were noted in the
9 t * 59
^ nopaer-Oetour Lakes area. e The iruilin^iis are primarily composed of poorly sorted sand to * granule qrdvel often vitb a margin of well sorted, clean gravel. The m larger irumlins in the Hopper-Detour Lakes area are composed of t poorly sorted coarse grained sand with minor lenses of gravel. t
GLiwiOFLOVlAL DEPOSITS
These are depositional features of subglacial streams active during the recession of the original Wisconsin ice sheet. The eskers noted on rijure 5 and on the accompaning map (back pocket) are large discontinuous features up to UOO m wide and 20-30 m high. They have a very irregular kettle-like surface and are usually covered with a 2-3 m veneer of Cochrane till.
The eskers found in scapa and Abbotsford Townships have been modified by action of Lake Barlow-0jibway while the eskers in Kenning and tomlinson Townships have been modified by glacial overriding (Boissonneau, 1965). The eskers are composed of well sorted* medium and cDarss grained sand, gravelly sand and coarse gravel with boulders.
boissonneau (1966) explains the effect of the ice of the Cochrane 60 v readvance on the eskers.
"Tha persistence of eskers after they were overridden by an ice mass * nay be accounted for in part by the fact that the advancing ice mass BDV23 parallel to the long axes of the eskers so that the levelling 9 action of the ice mass was minimal. To account for the surface relief fc of th* cliy till cap reflecting the uroken relief of the underlying glasiafluvial deposits, Hughes (1959b) suggested that buried ice t blocks lii not melt ur.til some time after the eskers were overridden. * However, a more or less uniformity thick till sheet, slumped into ^ kettle holes and smeared over swells, would mirror tha broken topograpay of the underlying deposits." 5
GLAJIDLACOSIRINE DEPOSITS
* VABVEO CLAY, CLAY AND FINE SAND l The licit 3f dsep stream cuts and road cuts in the area precluded any * detailed examination of varved clays. Lumoers (1962, 1963) described the varved clays as Drown to blue grey and undeformed with varves ranging in thickness from 6U mm to 254 mm. Beds of unvarved clay, J silt md fine sand were seen interbedded with the varved clays. Figura 5 indicates the extent of exposure of the glacial lacustrine i deposits with the map-area.
BECENT m . ei 9 ^ Woody sphagnum peat and other organic material now collecting in 9 •usfcegs form most of the fiecent deposits, some sediment is being * deposited along stream valleys, and in places streams have eroded c/ through the Cochrane till into the glaciolacustrine ^ys. This is most readily observable in the Kabika River in Kenning Township. 1
STfiJCrUHAL GEOLOGY
* The astavolcanic-metasedimentary rocks of the southern and northern supracrustal belts lie at or within the noses of two fold structures 2 which extend west from the main body of the Abitibi volcanic belt in j * 5 Quebec. The southern supracrustal belt is 0n antiform produced by the doming affect of the emplacement of the nistawak batholith and Bateman Lake pluton. Isoclinal folding was induced by interference * between the felsic to intermediate intrusive bodies found within the southern uelt. The northern supracrustal belt is isoclinally folded \ into in aaticline and a series of antiforms and synforms. The ' emplacement of the Detour Lake diorite warped the fold axes and
i indusad minor folding in the metavolcanics surrounding the body. Due to t ha lack of outcrop, structural data within the map-area is rare. * Host of the fold interpretation is therefore speculative and baoe-d least stratigraphic complexity.
MAJOR FEATURES p 62
^ FOLiJS
) In t ha Adair volcanics on the south side of the dome a northwest ^ plunging anticline is assumed to exist between the Patten River pluton md Abbotsford Lake. The repitition of netavolcanic litnologiss in Abbotsford and Adair Townships and the presence of f south facing pillow tops are the basis for this assumption. The south fdcinq pillows seen by Lumbers (1963) and the south facing sedimentary features seen Dy the author and Lumbers (1962, 1963) * indicate that the south limb of the anticline is a homoclinal seqaeaces, impart overturned, terminating with the Steele t? Metasediaents. In Kenning Township the metaseJiments are folded but y not eioagh is known about the geology to enable the author to interpret fold axes. l
* The nDrth side of the dome, in Hurtubise, St. Laurent, Bradette and NosswDrthy Townships comprises a curvilinear, easterly plunging synform and antiform pair. This interpretation is based upon t**' * 9***re * f * maintAiaiag a lithologic sequence of mafic to intermediate metavolcanics overlain by felsic to intermediate metavolcanics Dverlaia by a thick sequence of clastic metasediments similar to the * sequence on the south side of the dome. l The northern supracrustal rocks have been isoclinally folded about ) northwest trending axes which have subsequently been deformed by the intrusion of the Detour Lake diorite. The anticline found north of
l i. l 63
4 * Detour and Lower Detour Lakes plunges gently to te northwest at about 9 u5 degrees (Paul Brown, Geologist, Amoco Canada Petroleum Company w Limited, personal communication, 1978). The location of the axis of * the anticline is delineated by lithological changes found in diamond drill logs *ni opposing pillow tops found on the north and south m lirnus. Ine retaining synforms and antiforms were interpreted in order *" to maintain a simple stratigraphic succession and explain the curved natare of tae lithologic contacts.
FAULTS
KajDr nuits or lineaments have not Deen proposed for the map-area because tae amount of outcrop is insufficient and the overburden too deep for such interpretation. Three minor faults have been interpreted within the southern map sheet; two disrupt geology and one is interpcetted from a break in the magnetic trend.
The inferred fault in the southeast portion of Abbotsford Township can be seen oa the ODK-GSC 1 inch to 16 iaile aeromagnetic compilation map p. 578 as a break in the magnetic trend. It is a dextral northeast treading fault. An apparent north-northwest trending fault along the Burntbusa River in Noseworthy Township terminates the felsic to intermediate metavolcanics.
FEATURES l 6U l FOLIATION, SCHISTOSITY AND GN21SOSITY l The rDCKS Df the metavolcanic-netasediuentary belts, generally have * foliation parallel or at a low angle to Bedding. The foliation is defined by tha planar orientation of platy and acicular minerals such as biotite, chlorite, nuscovite and amphibole and by flattening of t clasts, and pillows. Foliation is well developed in all the •etivolcaais-aetasedimentary rocks in the nap-area. It follows or
defines the major trend of the beltsf and is usually dipping steeply. \ FDlidtion an i bedding is disrupted by the Histawak batholith in Kenniag, durtubise and St. Laurent Townships. Foliation is seen i approximately parallel to intrusive contacts southwest and west of t Detour Ldke. Hest of Sunday Lake foliation direction is variable.
\ Gneissosity is prevalent in the letavolcanic rocks near the contact l of the aistawak batholith and Patten River pluton. Gneissosity is defined by tha layering of felsic and femic minerals. lenoliths of volcanic material parallels gneissosity in the north portion of the \ batholith.
I C GEOLOGY l Binsril exploration activity has been documented vithin the nap-area since 1912 when gold was discovered on the Patten River (Tanton, l 1919, p. 3). The subseguent rush of prospectors failed to find any . valaaole deposits. Since that time the major emphasis has been \ t In the interest of rapid di*emin*tion of the nmiftt contained m Hm ftfort, ueme oftkedetm may no checked. Thia the OOS doet not guarantee the accuracy of-thaae fiturmand fltcpMto tka tamitr chock 65
towirls oise metal exploration. Activity has been sporadic since 1925 with increases in the late 1950s and Did 1960s, and recommencing in the ei riy 1970s. Exploration has increased since 1974 with the announcement of a gold discovery by Amoco Canada Petroleum Company Limited in the vicinity of Sunday Lake.
The initiation of prospecting activity in 1925 vas due to the discovery of copper-zinc mineralization at Normetal, Quebec. At that time the rocks that appeared to be most favourable for prospecting for bass aetals were the metavolcanic rocks in Adair Township which are structurally and lithologically similar to those rocks exposed at the fcoraetal' nine. Also examined during this period were the mafic e metdVDlcauic rocks in Steel Township. Numerous sulphide "shear zones" were discovered and trenched but nothing of value vas found (Lumbers, 1962). In the early 1930s Cyril Knight did some prospecting for gold on i group of claims that were staked along the Burntbush River (molson, 1936) .
More recently the exploration activity for base metals has been concentrated in three locations, Injhrder of decreasing interest these are: (1) the folded sequence of mafic to intermediate and ft. felsic to intermediate metavolcanics #nd iron rich metasediments in Adair and Abbotsford Township, (2) the interbedded felsic to a interiediite, mafic to intermediate metjBvolcanics and metasediments in the vicinity of Vandette Lake, and (3) the felsic to intermediate •etdvolcaaics in Bradette, Noseworthy and Hurtubise Townships*
l* tt* afttenw* ofr*piddimtminmtio*ofth*r*miltico*t*m*i fc thm Report, tom* of tki 4ttm mty not taw •tec*** Thtu tkfOGSdotn mot fnamiUw O* mcauley of Out* flgttrmt mud mm*** *** f**rf*rdWdfc oe*mml l 66
l Three deposits of economic interest have been discovered within the * e map-area. 1) In Steel Township a spodumene bearing pegmatite has been /l f assessed for its lithium and is held by Dex Limited (Assessment Files A. Research 3ffice. Toronto). 2) A low gr^de copper, nickel deposit was discovered in St. Laurent Township by Asarco Exploration Company of 't Canada (Assessment Files Research Office, Torontd).^ 3) In the Detour Lake area Amoco Canada Petroleum Company Limited has outlined 1C * F million tons of 0.2 ounces gold per ton (Assessment -Files, Research f Office, Toronto). These three deposits vill be discussed further under "Jescription of Properties".
C During the present geological survey samples were collected for gold assiy aid thirty element gualitative spectrographic analysis. Quartz veins sampled for gold were greater than 25 cm wide and up to 8 m C t Ion4* Tiro grab samples from two old pits in Steelr\ Township and 22 A rocks from elsewhere in the area underwent the spectrographic analysis. C COL;) DCCUBBSN:ES
* Three reported occurrences of gold have been noted vithin the map area. Hopkins (1918) described a gold occurrence on the Patten River.
w "In 1913 gold was reported to have been found at the 30-foot falls near the mouth ofn Pattens-river which is about two miles of mileage
In the mtormt ofrmpid dmtminmtiom of tk* rawtt* oontminfd m tkm Report, tom* oftkt 4mt* mmy mot fcwe toen mrticulotuly * 67
v 126 on ths interprovincial boundary. Several claims were staked and SOD:; surface prospecting done. The rock in the vicinity is an altered to quartz gaoaro, which looks fresher than the Keewatin and older than * the Kaweenawan. The quartz veins are narrow, usually under six inches in wiitn, and contain pyrite, calcite and occasionally low gold values. The vein on the last portage at the 30-foot falls was 5 reported to contain some visible gold. The deposits appear to be of K no economic importance. However, they are of interest in that they repieseat another locality in Ontario where gold has been found."
W ^ This is bdlieved by the writer to be the same gold discovery mentioned by Tanton (1919). Thomson (1936) reports on a gold occurrence on the Burntbush River.
*! S-' "Sons claims were staked by the Cyril Knight Prospecting Company on * the east s lie of the Burntbush .river, at the second long rapid about u fallis above the Kabika river. A small amount of trenching and stripping was done during parts of 1931, 1932, and 1933, but the claiis aave since been allowed to lapse. Much of the area staked is ^ drift-CDvared. Exposed rock consists largely of acid lava. Possibly x som* DI the a-id porphyritic rocks are intrusive and related to the * granite, out if so they are lithologically very similar to others known to be flow rocks.
* In places the rocks have been changed to schists and contain contorted quartz veins, which in places have been bent, broken, and
: M ** mtwmt ofrmpid dmtmmttion oftktnmttt eomtmmi* m tbm Report, tomt oft** 4** msy mat k** Wtn mfhemlomtly alttektd. T*m 1*t OGS 4o*t not gtuntttt* tk* 9ee*rmcy of tktti figivvg mild mm*** tt* rmltr ckfck original mmnm. Geological Report No. 14
tir -T- o. IV T. S) a- P-
1C zs :f •t d h l
J"!"? J K-S 2-S 28 |*'i Z--.< < < oflj
2! i 68
t i pulled d p a r t. These veins appear to be barren of gold, as shovn by r panning and assays. Trenching and stripping have been done t principally on shear zones containing quartz-carbonate veinlets in t altered acid rock., both containing pyrite. The trend is about E. 1C* S. The shear zones stand out nore markedly where they intersect l lignt-colDured massive rock than in the darker-coloured, more highly S schistel rock. At the place vhere most of the work vas done, a 6-foot zone, as described above, is bordered by fine-grained, aassive t rhyolite with disseminated fine-grained pyrite. The highest assay * result DOC ai ne d by C. F. fiice and J. D. Bateman (for the Cyril Knight c Prospecting Company) was 52. CO per ton in goldl. A grab sample t collected oy the writer yielded no gold."
The grade of this showing was calculated by the present writer to be C. 06 ounces/ton. During the present survey this location was visited but the exact workings were not found. A sample from a guartz vein witain the nearby metasediments was assayed by the Ontario Geological Survey Geoscience Laboratory and found to contain a trace of gold. The a D st important occurrence of gold is the A mo c o Canada Petroleum Limited*s gold deposit north of Detour Lake. The gold occurs * V both rfitain the quartz veins and surrounding meta volcanic rocks and * is associated with chalcopyrite mineralization. The property is discussed in detail later under "Description of Properties". C v Samples of quartz veins taken by the field party throughout the area ^ were ill assayed by the Ontario Geological Survey Geoscience m
In th* mttmt ofrmrUtmrmiiBtm* 0ft** nm*n 1 1 Bin m t i m Utm Jt*yorf. mtmt mfUtt4utm mty mot k** W*a d*ck*d. Jluu O* OGS 4o* mat g**m*** On •uwm-j ofOutt fig*m vtd mtmu* tk* mutor ehtdt origin^ Accessories : :
Z e p o ••r "i 1.u: 1 V xIt' Ok O 3 t^ t^ .5 c z r* •si m *o J fZ "f. 0 0 1 C- ^2 U! f- u. y O •f u: .2 oi o r" l* ^ * S J? 0 — . c JS 1 p l IS. r- O e: *^i i*} 0 Of
0 s 'S 1 1 z 1 g J e . " c ^ o "3.t: PM - Jg 0.3 58 1 l J jjj U-3 ^^ra "v* "5 -S..- di *j ^-~ J w c*^ e "i tt H 14! od
1, J: J)
/n Mr hrtffvr of rmpid dmtmuaatioit of Hu rtmltg con mtticuloiuly . rfc** tke OGS don wo/ gtnntHttt /Ae accuracy o/ 'l**' Ittt Mf"Ittider cheek original tovrcct. * - 69
* LabDratDry ani all contained traces of gold. t OCCOEHEHCES * Although pegmatites are common vithin the Case Batholith only one occarrenca of spodumene bearing pegmatite has bean found to date. m e •J This is tne Dax Limited deposit in Steel. Township and is described " fully under the "Description of Properties". The company planned to reCDvar the feldspars, mica, and possibly quartz. Tvo potential ore C zones were delineated by trenching and drilling (Karvinen, W. O. and Hunt, D. S., 1976) .
IBON 3C
* Eight occurrences of iron have been reported by Shklanka (1968) . Many 9 of these hare only been noted in diamond drill hole intersections and are usually thin and interbedded vith metavolcanic and metdsadimantary rocks. Two of the occurrences are of interest but v neither appear economic. 9 The Tiirgeoa Biver occurrence is found in the northeast corner of * Bradette Township and occurs in both Ontario and Quebec. This is an interlaminated magnetite ironstone-quartz iron formation vith an easterly strika and steep dip. It vas traced for a strike length of ^ 4,200 m and has an estimated width of 120 m to 3600 m (Shklanka, 1963) and an overall grade of 14 percent soluble iron. A single
In the interest ofn&d dittemination of fte lw* oimtumtl m M* JUpor*. WOT* 9(tl*4** mtj Mf cktcktd. Thia tk* OGS don not guaranty themoawcy of AMT ftM Mrf •M^ff^i tf 70
diamond drill hole in Bradette Township intersected 134 meters of iron formation (logged as such) within which 36 m averaged 23.8 percent soluble iron, 27 m averaged 22 percent soluble iron and 12 m averaged 23.4 percent soluble iron (Shklanka, 1968). Host of the exploration on this occurrence has been on the Quebec side of the border.
The Kanning Occurrence in the southeast corner of Kenning Township is the bast described of the known iron occurrences. It is described i* i* fully in the Description of Properties. The occurrence is a highly folded "iron formation 1* with interbedded magnetite, cherty wacke, and shales. It has a strike leirgth of 727 m and an average width of 61 A. The average yield of 25 grab samples was 24.5 percent ironl.—(4~ ftggassBjut. rilds, a e Jc a c c h Qffico, Toronto, QuL.)^ Davis magnetic tube tests of three samples between 20 and 33 percent iron at minus 130 masn gave concentrates between 67 and 69 percent iron and 3-7 perceat Si02 with 80-94 percent iron recovery1.-f4—Aujej^uiULL •ftcjciucott 3fiisg, TuLUiiLu, Oiifc.K
i BAS2 SETAL OCCURRENCES
* Since 1925 tha *#ln exploration target within the map-area has been for basa metal mineralization. Areas of principal interest are the felsia to intermediate metavolcanic rocks found in: (i) Adair and * AbDJtsford Townships, (ii) Bradette, Noseworthy and Hurtubise . Townships, and (iii) the region around Vandette and Atkinson Lakes. m
mot c
71
* Since the Amoco Canada Petroleum Company Limited/s gold discovery . north of Detour Lake exploration has increased in that particular metdVDlcaaic-metasediflientary belt. c Several companies have done prelimicary exploration work and follow up iiamDni drilling. The anomalies that were drilled were mainly C caused Dy ooth sulphide bearing graphitic horizons and/or massive sulphila horizons. Pyrrhotite and pyrite were the predominant C salp/e^hiie mineralization encountered. Many companies sent samples to C be assayed for Au, Ag, Cu, Zn and Hi. The results on these assays wera uniformbly disappointing. Even though significant amounts of pyrite and pyrrhotite were present in most cases, minerals of * economic interest were not discovered.
Within the map-area two companies have reported concentrations of C saber^nDcnic base metals. In St. Laurent Township Asarco Exploration Company of Canada has outlined a low grade* low tonnage copper- nickel C it. Nickalif erous pyrrhotite and chalcopyrite is concentrated in xenolitns of "dioritized andesite" which has been cemented by diocitij magma. According to company geologists the grade of this mineralization approaches economic values but the tonnage was too * small ta be CDnsidered economic!. H—frsaeaamont Filoo/— Dooeareh •of fi r A ,— r a c a n t o ,— Ontario)^- This property is described more fully unaer. " Descriptions. . of Properties.. "
Soli ainerdlization within Amoco Canada Petroleum Company Limited 's
In the interest of rapid dissemination of the result* contained m this Report, gome of the date may not checked. Thus the OGS does not guarantee the accuracy of theae figures estd mtgsjestt the romder check original somrces. 72
C gola deposit north of Detour Lake is associated with linor f chalcDpyrite. Copper assays 0.2 to 0.3 percent (Paul Brown, Geologist, Amoco Canada Petroleum Company Limited, personal * c D au ua i:: at ion, 1978) . The chalcopyrite is associated with pyrrhotite . and pyrite both within the quartz veins and surrounding rocks.
ANALYSIS
Twenty-tour samples were submitted to the Ontario Geological Survey Geoscieace Laboratory for thirty element qualitative spectrographic analysis. Two of those submitted were grab samples from a molybdenum prospect south of the Abitibi translimit road. One of these samples contained 0.01-0.1 percent of beryllium, and bismuth and 0.05-0.5 perceat of molybdenum as well as traces of chromium, manganese, vanadium and zinc. Low to moderate amounts of titanium and iron were also noted. The other sample taken from the prospect was identical except fDr the absence of beryllium and bismuth.
C The remaining twenty-two samples were hand specimens of typical rock types oscjrriag within the map-area and were submitted for whole rock analysis. The samples submitted had no visible base metal * mineralization yet many contained one or more traces of chromium, ^ cobalt, copper, nickel, and zinc.
EXPLOaATION POTENTIA'L
C
In the interest ofrmpid d ofthe m thm Report, tome ofthedmtm immy mot move been meticuiotuly checked. Thug the OGS dot* mot ote fttnve* omd mturet* the reoder check original tourcet. 73
Despite the disappointing results from extensive exploration activity for base metals to date the writer is of the opinion that the potential for finding interesting economic Mineralization vithin the lap-area retains high. The discovery of gold north of Detour Lake by Amoso Canada Petroleum Company Limited raises the possibility that gold might be found in a similar situation within the northern portion of the map-area. The Normetal Hine in Desmeloizes Township, Quebec is located within coarse grained felsic pyroclastics which are down strike from the metavolcanics in Adair Township. Aside from the * Kormatal 3ine numerous other copper and zinc showings occur in Desmeloizes Township and Perron Township to the north (M.R.N. Special w Paper 2) . t The area, in the writer*s opinion, with the most potential for a base metal deposit is in Adair Township south of Joe Lake. Lumbers (1963) * has reported finding coarse grained intermediate pyroclastic •L metavflcanis rocks which according to Sangster (1972) are favourable for basa metal deposits. The Normetal nine is located in a similar i environment 11 kilometers down strike to the southeast. These felsic metavalcaaics extend further to the west, well into Abbotsford 9 Township but become finer grained indicating a more distal facies and i a lower possibility for massive sulphide deposits. i The interbedded felsic to intermediate, mafic to intermediate * metavDlcanic and metasediment seguence in the vicinity of Vandette and Atkinson Lakes has, in the writer's opinion a reasonable
In the interest of rapid diteemination of the mult* contain** m Utm Report, tome of the 4*tm may mot heve been meticulotteiy checked. Thut the OGS doe* not guarantee the accuracy of theme fig*** e*td eufgeet* the render cheek origin** tomrcet. -•731 -
Photo 8 j Rafted xenoliths of. mafic metavolcanic rockj-caught up in a diorite on the Patten River in St. Laurent Townships
Photo 9 Intergrown quartz and feldspar found in quartz diabase
Jn the mttrttt of rapid di*t*min*tio* of t/W nmtto e** 4 in Hut Report, tome of ike data may not have oeen meticuloutly ohtcked. Tkttt the OGS doe* not fvmwtri tke mccwruey of MMK figureg mnd tufgfttt tHe meter c Heck original tourcet. 74 f potential for containing a base metal deposit. According to diamond drill ioqsl M A.IJA no O Files Ree.^ r ^ nff^o, T^mnfrn, n** j the li pyroclastic matavolcanic rocks are fine grained possibly l repcesantativa of a distal facies. Even though these rock types are not considered to De favourable for base metal mineralization the presence of barren sulphide mineralization either in graphitic horizons, missive beds or disseminations indicates a suitable environment for the deposition of sulphides. This area should continue to ba explored as many conductors wait to be tested.
The fslsis pyroclastic metavolcanic rocks in Bradette, Noseworthy and i Uurtuoise Townships are predominantly of the fine grained distal * 9 facias type. Although this area has not been explored to the same degcea as the previously mentioned areas there appears to be fewer sulphide occurrences. Along the Burntbush River some coarse grained * pyroclastic rocks are found. These pyroclastic breccias may indicate a suitable horizon for base metal occurrence. m
C sinsa AJ030 Canada Petroleum Company Limited was exploring for base i e11Is whan they discovered gold mineralization, it would appear that C samples racovared from exploration projects should be routinely C assiyai for gold. The gold in the Amoco deposit is believed by Amoco j geologists to have been leached from the juxtaposed ultramafic rocks to oe eventually redeposited within quartz veins in tension fractures S witaii a ainor fold (see Property Descriptions). If this hypothesis i is considarad tenable, then any ultramafic rocks encountered in an C
In the interut ofrmpid dunminition of the rtmtttt comtmuttd m Out Rtport, tome oftk* dftm mmy mat mm* been checked. Thut the OGSdoe* not guarantee the mccmrmcy of them figures ettd mqeutt the remdtr check origin*! tomnee. * 75
* exploration program should be examined for hydrothermal alteration ^ that lay have removed the gold. Care should also be taken to try and locate any nearby structural traps for the redeposition of the ^ leached gold. c DEscRipriDu OF PROPERTIES t * The description of properties in good standing on December 31, 1978 C are listed Dy the full name of the company or person who held the C property. Descriptions of properties with a showing marked on the maps out no longer in good standing, are listed by a name derived froi the company or party who carried out the exploration work. An * unclaimed parcel of explored land in which no mineral showings were locited is listed by the full name of the company or person who held the land and by the date in brackets of the last major work. c All the fallowing property descriptions, except-* for Amoco Canada w Petroleum Company Limited 1 s Detour Lake Deposit, are based on C assessment work filed in the Assessment Files Research office. Toronto. The information contained in the Amoco 1 s Detour Lake Deposit was provided by the company. t
* AHOCO CANADA PETROLEUM COMPANY LIMITED (1976) (1)
m AmocD Canada Petroleum Company Limited formerly held several blocks o 9 of claims in the region between Latitudes 49*^5'-49*55' north and
In the interest of rapid d itmt mutation of the remltn contained in fftu Report, tome of the data may not have been meticulomefy tnteked. Ttuu the OGS doet not guarantee the accuracy of theee figure* and mtggeit* the reader cheek original touroe*. * 76
f -* * Longitude 79*1*5* west and the Quebec border. These claim blocks are interpreted by the author to be underlain by interbedded felsic to intermediate, mafic to intermediate metavolcanics and metasediment- * ary rocks.
Thesa claim blocks were staked over geophysical anomalies. Between C 1974 and 1976 a total of nineteen diamond drill holes were drilled far 3,325 m to check bedrock conductors. The sources of these ^ conductors were found to be either graphitic horizons or zones of up C to 33 percent sulphide mineralization. The predominant mineral was pyrrhotite with associated pyrite. All the mineralized portions were sampled dnd assayed. The results of these assays were poor 1. "H* t - Aab^ssasal rilyb, Rejaairob Qtfico, Toronto, Qnt.),.
C AilO-D CANADA PETROLEUM COMPANY LIMITED (1976) (2)
f Aioco Canada Petroleum Company Limited formerly held several blocks Df claims east of Hopper Lake and west of Detour Lake. The claims are t intarprstad by the writer to be underlain by metasediments with some iutarueiled mafic metavolcanics. l
^ These claims were staked over geophysical anomalies. In 197U and 1976 a qcoani geophysical survey was carried out over the claims east of tioppac i.aK.3. These surveys discovered one weak conductor and several C magnetic anomalies. A single 132 m diamond drill hole was sunk to test the anomaly and it intersected metasedimeXSnts with disseminated
t l©© t** A*S**" eft"*,
H ^ In the intent** ofnpid du~mi**tio* of t** rvwJto contained m thm Report, tom* of the (Utm msy not Hoot oten metiatlotufy checked. Thut the OGSdoet not gumrmntee the mccuracy of thete figure* *nd mta**M the noder check onginol tow**. f 4
* 77
* minarilizdtion . The assay results were poorl. (1— Assojoment ?ilocr aiMi^.b-n afgiiaoj T'lrontoi QntQv West of Detour Lake 2 diamond drill f holes totalling 368 m were drilled in 1974. These holas intersected ' interbedded matasediments and metavolcanics locally containing up to 10 peccant disseminated pyrite and pyrrhotite. The assay results were pDorl^ (J — ft*g?ftg gmont Fiioc,— RQccaroh Office/ Toronto! Ontario) . t
D CAHADA PETROLEUM COMPANY LIMITED (SUNDAY LAKE PROPERTIES) (3)
4 In 1978 AaiocD Canada Petroleum Company Limited held 351 unpatented claims north Df 50*00' north Latitude and the Quebec border and * 7y*-*7 l west Longitude. These claims are numoered as such. P.388U85 to 5 p. 388487 inclusively, P.U00980 to P. 400983 inclusively, P. 401006, P.UD12C7, P.4D1010 to P.4C1013 inclusively, P. 401015 to P.401C23 inclusively, P. 421280, P. 421281, P. 421285 to P. 421380 inclusively, f P. 421385, P. 421390, P. 421395 to P.421489 inclusively, P. 421728 to P. 421749 inclusively, P. 421761 to P.421782 inclusively, P. 421794 to 9 P. 421843 inclusively, P. 421860 to P. 421863 inclusively, P. 421893 to C P. 421912 inclusively, P. 429745 to P. 429760 inclusively. Within this ^ la r q e group of claims there are 24 leased claims covering the Amoco i Sold Deposit which will be discussed next. Metasediments are * interpreted by the author to underlie the southwest portion of this claim group; elsewhere mafic metavolcanics are interpreted to be the preioiiaaat rock type. t To case*, geophysical anomalies 9 exploration diamond drill holes were
In the interest of rapid domination of the remits contain** m Hut Report, tome of f** detm m*y not kwue been metieulonety checked. Thus the OGS doet not guarantee the accuracy of them figmve* and mqteti (Ac rarfcr check original eowvet. 78
suns for a total of 1229 m. These holes were drilled between 1974 and 1976. Taese diamond drill holes intersected mafic metavolcanic flows, and tuffs with minor interbedded felsic to intermediate metavolcanics. Locally the mafic metavolcanics contain thin horizons with jp to 80 percent pyrite-pyrrhotite mineralization. Assay results reported for Au, *fu, Zn, and Hi are uniformly disappointing V-(4- li Qfliue,— Toronto^ —Qntt)-^ Such of the exploration work done on these claims has not been submitted for assessment credit.
ASOCD CANADA PETROLEUM COMPANY LIMITED (DETOUR LAKE DEPOSIT) (4)
C in 197d Aaoco Canada Petroleum Company Limited held 24 leased claims locitad 15 km north of Detour Lake. The numbers of the leased claims C ace: ?. 400971* to P. 400979 inclusively, P.401008, P.401009, P. 401014, C P. 421282 to P. 421284 inclusively, P. 421381 to P. 421384 inclusively, P. 421386 to P. 421389 inclusively, P. 421391 to P. 421394 inclusively. C This qold deposit, discovered in 1974, is centered on the i co-oriinates 50*00*50" north latitude and 79*42'20 M west longitude.
C The deposit was found as a result of an airborne geophysical survey C carried out in the fall of 1974. The discovery anomaly was drilled ir and found to be caused by barren sulphide mineralization. These C sulphides carried gold values but little else (Northern Hiner, 1975). w Exploration and surface development drilling was carried out from the fall of 1974 to mid 1976 an4 consisted of 129 diamond drill holes
4- /3ssess**e*-t f, let
In the interest ofrmpid *f ttbc * m tim Report, oftktdttm mry mot have been meticuiotaty cheeked. Thug the OGS doe* mot tme ecemmey oftmemt figure* emd t*m*ett the remdtr check ongmml tottfcet. 79
amounting to 41,212 o. This drilling outlined 10 million tons of ore with an average grade of 0.2C4 ounces per ton cut (Northern Miner 1976).
In 1977 a aa jar underground program to further explore and evaluate the deposit was commenced. The program consisted of a 753 m long decline to the 12C m level with over 300 m of drifting and crosscut ting (Northern Miner 1977). A 100 ton bulk sample was removed from three crosscuts through the main zone. In addition to the bulk GU 9, 1C? m of underground drilling was carried out at 7.6 m intervals through the main ore zone. This drilling consisted of a fan X of '4 Qjr drill holes at every station and an additional fan of 3 NQ drill holes at every second station (Don Deem, Senior Mining Engineer, Amoco Canada Petroleum Company Limited, Mining Division, GU Personal Communication, 1978).
The deposit is situated on the north limb of an anticline plunging gentlf to the west-northwest. The mineralized zone strikes 070 degrees , dips steeply, is up to 900 m long and has been proven to a depth of 150 i. Mineralization has been intersected at a depth of 545 m wnere assays averaged 0.49 ounces per ton over 4 m. The main mineralizad zone is found within the hinge zone of a flexure in the***** limb Df the anticline. This flexure plunges 45 degrees to the west (Paul Brown, Geologist, Amoco Canada Petroleum Company Limited, personal communication, 1978). The dip of the main mineralized zone, steep naac surface, becomes more gentle to the north at depth. See
At ifce mterett of rapid diatemination oftkervomM* eomtamod m tkm Report, tome of the data may mot hove been meticuioudy eheeked. Thm the OGS doet not jmarommt tke •cmfwj of thaat fifttrn and mtm**t the remder check original 80
* Figara 6. t Figar2 7 is a generalized geologic column showing the stratigraphic ™ position of t tie main mineralized zone. The base of the sequence is a thick succession of arkosic metasediments with the occasional mafic flow. The metasediments grade upward into 300 m of mafic tuffs which 9 are overlain by 30-9C m of felsic "agglomerate" (pyroclastic breccia). A further 30 m of mafic tuff overlies the felsic metavalcanic horizon, which in.turn is overlain by 3-90 m of 9 serpeatinized mafic to ultramafic rocks; separated by 15 m of felsic tuff. Overlying the serpentinized mafic to ultramafic rocks are 5 to 9 a f* 10 m of intermediate tuff and cherty tuff. Capping this sequence .ia- 9 interbedded mafic flows and intermediate to mafic flows which are greater than 300 m in accumulated thickness. Total thickness of the stratigraphic column is greater than 1363 m. The volcanic sequence is 9 cut by metamorphosed mafic dykes and sills. * The main mineralized zone incorporates the basal portion of the mafic 9 florf sequence, the upper part of the ultramafic zone and intervening intermediate tuff horizon. Figure 6 is a composite section (line 186S, 1d7S and 188E) taken from the drill hole sections submitted by w Amoco Canada Petroleum Company Limited for assessment credit. Holes 36 and 61 occur solely in the plane of section 136E while holes 1C5A, 116, 101, 97 and 90 are only in this plane above the short vertical 9 line IrawQ through the holes. The continuation of these holes are in section 137fi and except for hole 101 terminate in the plane of this
In the mtereat of rapid dutemination of the remttt contained in thu Report, tome of the data may not have been meticulously cheeked. Thug the OOS doc* not guarantee the accuracy of thorn figure* and auaettt l** reader cheek original MMUTVC. oacustrine deposits from Lake sssa Barlow-Ojibway, varved clay, fine sand
Cochrane Till
,.*'*'* Esker
Fluting, Drumlins, Striae
. J Late Cochrane Ice Frontr Raised Beach
FIGURE : Surficial Geology of the Burntbush-Detour Lakes Area Scale 1"*16 miles. Map from Bennett et al (1967).
In the mternt of rapid domination of tke mult i contained in tkit Rfport, tome of tkt data may not Aauc been meticulously checked. Tktu tkt OGS doet not guarantee the accuracy of that figure* and tuggeitt fne reader cheek original tources. * 81
* section. In hole 101 below the second vertical line the hole . contiauas into the plane of section 188E. Above the main zone of mineralization there are three minor zones of quartz veins which * carry gold values. The most important of these is found 100 m . stratigraphically above the cherty tuff horizon and can be traced for 9 670 o along strike. This zone extends from surface to an appreciable C depth (Paul Brown, personal communication, 1978). Further drilling is ^ required to further delineate these mineralized zones.
The gold in all mineralized zones is closely associated with chalcopyrite vithin both the quartz veins and surrounding metavolcanic host rock. The average grade of copper vithin the main * minaralizsd zone is 0.2 to 0.3 percent. Pyrite and pyrrhotite are the * i* * predominant sulphide minerals. Between the talc-carbonate schist w portion of th3 ultramafic rocks and the cherty tuff (figure 7) a ( variable thickness of chlorite alteration occurs (figure 6). This blazic massive chlorite was once thought to be a high magnesium basalt (Paul Brown, personal communication, 1973). In the cherty tuff that * has D3en brscciated Dy the quartz veins potassic alteration, in the fora of pink potassium feldspar is common. The quartz pods and stringers hava a predominantly northerly strike and short strike * lengths. t Company geologists believe the gold mineralization is epigenetic and P two models have been considered to explain its origin. Neither model * has preference over the other.
i In tk* infer*** of rapid ditaf mutation of tht mutt* contained in thi* Report, tom* of tfc* dmtt may mot have been meticuloutty . T*u* th* OGS doe* not guaranty the aceuroey of them figwa* and mtft*** the rWrr ck*ck original MWTOM. 82
One nodal explaining the origin of the gold is as follows. After fg deposition Df the volcanic sequence and prior to folding; the gold * was ladshad from the ultramafic rocks by circulating fluids which produced tha carbonitization and serpentinization in the ultramafic w rocus. rhasa gold bearing solutions migrated up section where they ^ were trapped in the cherty tuff horizon. The primary sulphides in the cherty tuff caused the precipitation of the gold. The cherty tuff © when analyzed has anomalous background values of gold compared to the surrounding rocks (Paul Brown, personal communication, 1978) . Subsequent folding, forming a flexure, created tension fractures. t Synchronous with the folding a distant heat source remobilized the *" gold along with the guartz and chalcopyrite and reconcentrated them with quartz in the tension fractures in the hinxe line of the w flexuca. Not all the gold bearing fluids were trapped in this zone o* ** and tacae other zones of gold and chalcopyrite bearing quartz veining formed in pressure shadows -fKr" urther up section.
40 i rae sacond model is similar to the first and differs only in the time ^ of initial emplacement of the gold ia the chert. After the deposition F of t ha lower mafic and ultramafic rocks, there was a quiescent period * in tha volcanism during which time the cherty tuff was deposited. ^ Synchronous with the deposition of the chert circulating hydrothermal * fluids zacbonatized and serpentinized the mafic and ultramafic rocks 5 and leached the gold which was redeposited in the chert and sulphides. This resulted in anomalous concentrations of gold within
M the inter*** of rapid dmemumtion of (** rtmta co*tmi**4 m Mt Report, tome of the dmtm mey mot keve been meticulotuty cheeked. Thtu the OGS doet not guarwte* the eeurmey of thorn flfuras end w0c*O *** reoder cheek ongme4 eowcee. * 83
* the chert. Volcanism then recommenced and deposited the overlying ^ mafic matavDlcanic rocus. The subseguent tectonic activity which remobilizad the gold and chalcopyrite into the quartz veins is the * same as ia the first model.
I ASAHCO EXPLORATION COMPANY OF CAHADA (MOWAT OPTION) (1966) (5) i James B. Mowat formerly held 12 claims in Hurtubise Township. These claims, ia two groups, were at the confluence of the Burntbush and 3 Kaciiti River and two kilometers up the Kabika River. These two claim groups are interpreted to be underlain by mafic metavolcanics with interbedded metasedinents.
In 1956 Asarco optioned these claims and carried out a ground magmatic and alectromagnetic survey. Six conductors were found on the ? two groups and two diamond drill holes were sunk for a total length of 212 m. Both the holes intersected fine grained metasediments with graphitic horizons.
* ASASCO EXPLORATION COHPANY OF CAHADA (ST. LAOHENT DEPOSIT) (6)
In 1973 AsaccD Exploration Company of Canada held 12 leased claims in central St. Laurent Township. These claims are numbered L. 87926 to L. 87937 inclusive. These claims are underlain by mafic metavolcanic * rocks.
J. rt* mte~t afraid domination ofth* ~to omteM m tM. R****, W 84
3 Priar tD 1965 Asarco discovered a zone of disseminated sulphides.
™ This discovery was evaluated by geologic mapping and diamond drilling. In 1965, in order to further evaluate the discovery an 9 induced pDtential, magnetometer and electromagnetic survey was carried out over claims L.87929 to L.87933 inclusive. The I.P. anoialy and the magnetic anomaly were the same shape and caused by fc disseiinated magnetite. An electromagnetic anomaly vas also outlined in the same region. This anomaly was substantiated by diamond W drilling and found to be caused by stringers and disseminations of 9 pyrite, pyrrhotite and minor chalcopyrite. Two diamond drill holes were drilled in April of 1965 for a total of 211 m and intersected 3 minar pyrite and pyrrhotite mineralization. In the winter of 1966 5 ? more iiiaond drill holes were drilled for a total of 964 m to further check the zone outlined by previous drilling and geophysics. 3
^ In the winter of 1970, 143 claims, which included the original twelve, were explored using magnetic and electromagnetic methods. The SI electromagnetic survey outlined one sygnificant conductor which has ? been described in the previous paragraph. A number of weak, irregular responses were found which did not have any coincident magnetic 9 expression. In June 1970 four of these conductors were tested with 9 single diamond drill holes which totalled 409 m in length. These drill results were disappointing since very little mineralization was encountered.
In the summer of 1970 a detailed geological survey was carried out
3? In the interest of rapid dissemination of the remits contained in thit Report, tome of the data may not have been meticulously checked. Thus the OGS does not guarantee the accuracy of these figures and suggetts the reader check original sources. i 85
* over t ha entire 1U3 claims. The larger group is underlain by ^ predoaiaantly mafic meta volcanic rocKs except for a coarse grained E diorite t? quartz diorite intrusion in the northeast corner. A^8*~ * sialler mass of diorite centered on claim L. 87930 has been interpreted by Asarco geologists to be an apophyse of the larger diorite DO dy. See figure 8 for a detailed map of the twelve leased " claims. r Hear the northern contact of the small diorite body in the mafic O l me ta volcanics is an "andesite-diorite" hybrid contact zone. This 4 hybrid contact zone is 6 1 m wide, strikes 060 degrees and dips v approximately 70 degrees to the south. The complex consists of * fractured "iiaritized andesite" blocks surrounded by coarse grained diorite. These xenoliths of "dioritized andesite" contain nickelif erous pyrrhotite and chalcopyrite. The mineralized xenoliths ' are found in a narrow zone adjacent to the hanging wall of the k complex. Company geologists report that the grade of this ^ minaralizition approaches economic values but the tonnage is too ' 3mall1,-(1 Aaoeaaaent Files/ fieaeatcU OCIica, Toronto, Qnt.)-
CAMADIAB SUPERIOR EXPLORATION LIMITED (1966) (7)
Superior Exploration Limited formerly held five claim groups in the southeast quadrant of Abbotsford Township and southwest quadrant of Adair Township. Underlying rock, types are mafic Beta volcanic flows interbedded with felsic to intermediate
in ttu intern* o f rapid diminution of f** rtmitt etMiteMtf in tk* R fport, mn* of f** d*t* mmy mot km* b**n mcttculotuly 86
pyrDclastics md minor metasediments.
These claim groups were explored using magnetic, electromagnetic and ^ graviietric methods. One group had a geologic survey carried out over it. AaDaalies with varying degrees of potential were confirmed on t. each claim group. Those anomalies found in Abbotsford Township were l tests! with eight diamond drill holes totalling 702 m in length. Mineralized sections containing up to 3G percent pyrrhotite and ' pyrite with poor assay results . were intersected^. (-4 — Abboa&uieuL t RotfOuicen Jffira, — Toronto,— Qnt* ) n —
I CANADIAN SUPERIOR EXPLORATION LIMITED (1966) (8) C Canadiaa Superior Exploration Limited formerly held 34 claims in central Kenning Township* These claims are interpreted by the writer * to oe underlain by metasediments.
I In 1956 a ground magnetic and electromagnetic survey was carried out i and 3 1 tin ei three conductors. Two diamond drill holes were sunk for i an accumulated depth of 224 m. Metasediments with disseminated and locally massive pyrite and pyrrhotite were intersected. Assay results t were poarl. (-1 a.ssfls&ftent Filoc, gocoarch Office, Toronto, Qnt.) . i CANADIAN JAVELIN LIMITED (1965) (9)
l A, Canadi-dfi Javelin Limited formerly held two claim groups in Adair and m
P.l+s faster* l* G ff, e*, fare* J In the interest of rapid diatemiitmtiom eftme ivorite ntntemed m Hut Report, taint oftkedestt mmy not kent been meticubmefy checked. Thtu the OOS doet not gttenmtee the tfcm+cy of them figure* emd tufgeett tke feeder check original ttntrcet. 87
I'ovnships. These two claim groups H-2 and H-3 were staked as ens result of an airborne geophysical survey flown over 768 square kilometers in Adair, Abbotsford and Hepburn Townships in 1962. The H-2 group consisted of 62 claims in Adair Township south of Joe Lake and the a-3 group consisted of 36 claims located along the southern portion of ths Adair-Abbotsford Township boundary. Both claim groups are underlain by intermediate to felsic metavolcanic with intarLayered mafic flows.
The H-2 group contained one anomalous zone which was considered to be of ID significance and no further work was done on the block.
2 The tt- 3 group contained six anomalous *ftones which were outlined for further exploration consisting of a ground electromagnetic survey, a geological survey and diamond drilling to determine the source of the conductors. The diamond drilling consisted of 1U diamond drill holes witn i total length of 1283 m. The conductors were pyrrhotiferous, tuffaceous mudstones within a sequence of felsic to intermediate metavDlcanics. Mineralized portions from a few drill holes and outcrops of rusty ampnibolite were assayed and the results were
f*—^^gcmon* gilnr, nnnmii^li (\rr\..m f Hi^Pftn + n, nnf J
CANADIAN NICKEL COMPANY LIMITED (1971) (10)
' Canadian Nickel Company Limited formerly held claims in three separata localities in the northern part of the map-area, on the
v l l j In the interest of rapid dissemination of the remit* contained in thtt Report, eonte of the data may not have been meticulously checked. Thug the OGS does not guarantee the accuracy of theee figures and ettggreh the reader check original eomrcee. r '88
l claims held, five diamond drill holes were sunk to test electromagnetic anomalies. A 115 m deep daimond drill hole was sunk north-northaast of Detour Lake in very weakly mineralized interbedded ~ * metissdimants and graphitic metasediments. A 105 m deep diamond drill hole *as sunk south of the east end of Hopper Lake and intersected - ir very weakly mineralized mafic tuffs and metasediments* t North-northwest of Hopper Lake 3 diamond drill holes were sunk for a total of 375 m in weakly mineralized matasediments with some interbedded mafic metavolcanics. t
CONtfESI EXPLORATION COMPANY LIMITED (1958) (11)
l Conwest Exploration Company Limited formerly held a group of claims in the southwest quadrant of Noseworthy Township, east of the Barntbush River. These claims are interpreted by the author to be * undsrLain by metasediments. t la 1958 a ground electromagnetic survey was carried out which C outlined two good and several poor conductors. No further work is on recori in the Assessment Files, Research office, Toronto, Ont.
C CDNWEST EXPLOBATION COMPANY LIMITED (1960) (12)
C Congest Exploration Company Limited formerly held a group of claims C between Vandette Lake and the unnamed, narrow, north elongate lake south of Detour Lake. The underlying geology is interpreted by the
In the mttrttt ofrtfU 4m*mimatiom eft** ifmtlt mnimi** m thm Report, tom* of the 4mU m*y not km* been meticulomtly ctodkcd. Tfcni t** OGS don mot JOTM*** th* camcy oftbn* AfHtw **d mm*** (*e rwrfer check or&nmi tottnx*. * 89
' present survey to be interbedded felsic tc intermediate, mafic to . interaeiiats metavolcanics and metasediments. Three claims were also 1 u. held Along the Quebec border east-southeast of Cyrfthbert Lake and are interpreted to be underlain by mafic metavolcanics.
In 1959 a ground electromagnetic survey outlined five strong conductors on the property west of Vandette Lake. Nine diamond drill holes totalling 1091 m were sunk to check these conductors. The drilling encountered pyrite and pyrrhotite mineralization as disseminations, thin massive zones and as stringers and blebs within graphitic horizons. Assay results were not reported.
The tarae claims east-southeast of C^thbert Lake had two diamond drill holes sunk in 1960 for a total depth of 185 m. The diamond drill holes were in interbedded mafic to intermediate metavolcanics and metasediments. pyrrhotite and pyrite mineralization was found to De disseminated and in blebs and stringers in both the metavolcanics and metasediments. Mineralized sections were sent for Au, Ag, Cu and Zn assay. The results were discouragingl. H—AoooooamiL Fll*^,——- DooaArcti Jffioo, Toronto, Qntar-fcef-.-
DEX LIflllSD (STEELE LITHIUM OCCURRENCE) (13)
In 1973 Oex Limited held 31 unpatented claims numbering L.459925 to L.U59945 inclusive, L.35U485 to L.354487 inclusive, L.363059 to L.36J061 inclusive, i..363067, 1.363068, L.354U90. Four additional
In the interest of rapid dutemination of the remtitt contained m Hut Report, tome of the dmtm mmy mot hmve bee checked. Thus the OGS does not guarantee the accuracy of them Afum m*d mtfgettt the remdrr cheek onginmi 90
claims, L. 2*9568 to L. 299570 inclusive and L.300983, were leased for 21 years affective November 1, 1976. The property is located southeast of Case Lake in Steel Township and is underlain by quartz t A t monzonite, granodiorite with numerous pegmatite dykes. t Spoduiene oearinq pegmatite was discovered and described by Lumbers l (1962) ini tha follwoing is his description.
"The spDdumsna- bearing pegmatite dike occurring in lot 5, concession l V, Steele /township, is complex and zoned. This is the only complex pegmatite notsd within the batholith. The pegmatite displays a narrow i aplitic gorier phase in places and contains numerous quartz rich l patsnas, which appear to form the core of the pegmatite. Spodumene crystals* up to 3 feet long and 6 inches across, are most abundant in the quartz-rich patches. Columbite-tantalite, muscovite, and l tourmaline are found with the spodumene. Molybdenite is rare. l The di ice was traced in an east-west direction for a distance of 825 l feet along strike, and it attains a maximum width of 100 feet. The dike grides into several quartz-rich stringers at its west end and is covered b/ vegetation and glacial deoris at the east end of its l outcrop area. t The only aineral of economic significance in the dike appears to be f tne spoiuieae, which occurs as well-formed crystals up to 3 feet long and 6 inches in cross-section. The spodumene content of the dike is f
In the intern* of rapid dmeminmtion of the mutt* eontmuted m thm Rtport, tom* of the dmtm mty mot Hmue botn meticulotuly checked. Thut the OGS doe* not guanntte tk* •ecu/vcy of thtte figure* mnd mtgitttt the rmdrr cktck original OMMTVC. 91
estimated at 10-15 percent. It is best developed in the quartz rich core Df the dike, although a few crystals were noted in pegmatite r stringers extending from the dike into the surrounding guartz * monzonite. A qrab sample taken by the author from the dike assayed C . 65 percent lithium and shoved a trace of beryllium. Carefully i selected spodumene, assayed by the Provincial Assay Office, gave 7.63 k percent Li20 upon analysis. 1* f Samples were submitted to the Mines Branch in 1963 by Canadian Johns-Haaville Company Limited and were found to contain beryl crystals, spodumene, pollucite and columoite-tantalite. Ore samples assayed 0.37 percent BeOX (^Mineral Deposit File, Research Office, Toronto, Dnt.) .
The QDW leased claims, were originally staked in 1971 by John Tesluk of rimmins and transferred to Leonard Darby the same year. In 1972 and 1973 the showing was stripped and trenched. In 197U Leonard Darby transferred all interests to Dex Limited who subseguently sunk a 31 m diamond drill hole to determine the depth of the spodumene mineralization. By 1975 two mineralized zones were delineated and a 4 km rodd was built to provide access to the property.
SYNDICATE (1977) (14)
Dighei Syndicate formerly held four claims, bisected by the south half jf tae Abbotsford-Adair townshipr boundary. The claims are
In the interest o f rapid ttimrnimmtn* *f t*t ,im** I©smtmmt* m tnm Report, tom* ofthtdutm m*y not tone Awn m*ticulo*uly cheeked. Thu* the OGS do* not gttmmUm the mecmrmey *f tkem figttm and mggettg tt* nmd*r ck*ck origin*! murrec 92
interpratad t3 be underlain by felsic to intermediate metavolcanics with some iotarf ingered mafic metavolcanics. t in 1977 the claims had a ground electromagnetic survey carried out on then and tha single anomaly was tested with a 157 m deep diamond W drill hols* Mineralized zones with up to 10 percent combined f pyrchDtita and pyrite were sent for assay with negative results*^ (Assessment Files, Research Office, Toronto, Ont.).
f DOSiJi EXPLORATION (CANADA) LIMITED (ABBOTSFORD LAKE PROPERTY) (15)
~.n 197d Dome Exploration (Canada) Limited held 83 unpatented claims in tha following locations: northeast corner of Case Township L. 429518 to L. 429520 inclusive, L.429523; southwest corner of Singer Township L. 429645 to L. 429647 inclusive, L. 429650 to L. 429654 inclusive, and the northeast quadrant of Abbotsford Township L.429510, L.429515 to L.429517 inclusive, L.429625 to L. 429628 inclusive, L. 429631 to L. 429636 inclusive, L.429572 to L. 429575 inclusive, L. 429578, L. 429564 to L.42'9569 inclusive, L. 429580, L. 429581, L. 429584 to L. 429587 inclusive, L. 429591, L. 420882, L. 420335 to L. 420387 inclusive, L.420390 to L.420894 inclusive, l L. 4203 96 to L. 420906 inclusive, L. 420910 to L.420912 inclusive, L. 420942 to L. 420944 inclusive, L. 420948 to L. 420952 inclusive, L. 420954 to L.42C960 inclusive, L. 420962 to 420965 inclusive, l L. 420972, and L. 420973. These claims are underlain by an isoclinally
* folded sequence of felsic to intermediate metavolcanics,
In tkf MOTH* ofrmr* 4m*mm*mm ftkt rtmMt eamtnimi* m Out Report, MMM ofthtiUt* m*y mat tow favn ct*ck*d. Tk*91** OGS 4~* m* g***m*t tks mtaumey *f Ottte figum m*d mtfffttt th* rtmdfr check anginal aow 93
metasedimsnts and mafic metavolcanics.
la 1975 aa airborne geophysical survey was flown 9? the original - claim group of 172 claims. A ground magnetic and electromagnetic , survey was ione in late 1975. The two geophysical surveys delineated t nine conductive zones. The most interesting of these conductive zones - is i zona of discontinuous conductors about 300 B wide and 9.6 km long. This anomalous zone was tested between 1976 and 1977 with 21 I iiaJiDtii drill holes totalling 2369 m in length. The conductors were i found tj je thin massive and disseminated horizons of pyrite and pyrchitita. Tha massive sulphide horizons contained up to 50 percent pyrite ani pyrrhotite in varying proportions. Assay results on i minenlizad portions were up to O.C1 ounce/ton gold, and up to 0.1 percent copper with traces of zincl. -H —Assoooment Pi-ires-; —Rea ear eh oifisBi — rJi'Milu, pai*) r^ Mineralization was confined to predominantly l two rae*. types; "iron formation" and intermediate tuff. f rl EXPLDkATION (CANADA) LIHITED (TOMLINSON PROPERTY) (16) t la 197d Dome Exploration (Canada) Limited held 35 unpatented claims in tha southern part of Tomlinson Township. These claims are numbered l as follaws: L. 420993 to L.420995 inclusive, L.420998 to L, 421000 inclusive, L. 420915 to L. 420920 inclusive, L.420922 to L.U2092U inclusive, L. 420927 to L. 420929 inclusive, L. 429529 to L, 429531 l inclusive, L. 429534 to L. 429539 inclusive, and L. 429541 to L. 429547 inclusive. These claims are interpreted to be underlain by mafic to
In the interett of rapid di**minationof Me nMito gBHIbiixrf m thm Report, mtmt of tttt d*tm mmy not kaoe botn mtticmtotuty checked. Thus the OGS does not guarantee the accuracy of thorn figwe* o*d mjgrttt the rtoder chock origtnot tounxt. 94 t * intsnediate m eta volcanics.
3 In 1975 a large area, which included the south portion of Tomlinson m ** S Township vJdfe surveyed using airborne geophysical techniques. This survey indicated an easterly trending structural zone with an ft associated series of conductors. Within the present nap-area three l diamond drill holes totalling 287 i in depth wera sunk in 1977. These diamond drill holes intersected intermediate to mafic tuffs with S interoedded graphitic tuff horizons. Mineralized zones were assayed for AJ, Ca and Zn with negative results 1. (1 RQfa-jArcT Jffi-a,- Toronto, QniQr-
* 00:1 E EXPLORATION (CANADA) LIMITED (BURNTBUSH BIVEB PROPEBTIES) (17) i In 197d Dome Exploration (Canada) Limited held 31 claims in two I groups. The northern group straddles the central portion of the T ^ Nosaworthy-dradette-^Township line and are numbered: L. 3U7800, L.3473J1, L.34780U, L.3U7605, L.3U808, L.347809, L.347812, L.3U7816, * L.367093, L.367C96 to L.3671C8 inclusive. The southern group r straddles the eastern edge of the Noseworthy-Hurtubise -Township line and are numbered: L.367115 to L.367117 inclusive, L.367120 to *- L. 357122 inclusive, and L.367125 to L.367127 inclusive. The southern
** group is interpreted to be underlain fay felsic to^intermediate metavolcanics and the northern group is interpreted to be underlain *f; by a folded pod of metasediments within felsic to intermediate metavolcdnics.
f'l** flese*"** cffite, T**** d*
In the interest ofrmfM dmemmttiom vf the mmMt tomtmimtd m thit Report, tame of Hit d*tm mmy mat kmut been meticulotuiy checked. Thtu the OGS4ott motg**mmtM tmtmeauncy 9f them figure* m*4 mttftttt the reader check origin* etwee*. 95
In 1973 d ground magnetic and electromagnetic survey was carried out on ths two groups of claims. Numerous continuous conductive zones vera ansountered suggesting stratabound conductive material. To folio* up tde geophysical exploration 15 diamond drill holes were sunk oetwaen 1973 and 1975 in Hurtubise, Noseworthy and Bradette Townships. In Hurtubise Township 3 diamond drill holes totalling 261 D war* s unit into intermediate to felsic tuffs with up to 20 percent pyrite in disseminations and bleas. In Noseworthy Township 7 diamond drill holes totalling 868 m were sunk. Individual holes intersected priiarily metasediments or intermediate to felsic tuffs both with graphitic horizons. Sulphide mineralization consisting of pyrite and pyrrhotite occur as fine disseminations, blebs and bands in amounts up to 53 percent of the rock. In Bradette Township 5 diamond drill holes totalling 587 m were sunk* Individual holes intersected primarily meta sediments or intermediate to felsic tuffs. Kinaralization was similar to that occurring in Noseworthy Township. A naabec Df samples from each diamond drill hole were assayed for Au, Ag, Cd ind zn and the results were discouraging K (1 Asjeaomont FiloG, y— TorontQj— Qnta ) ^
S SXPLJRATION (CANADA) LIMITED (1970) (18)
Dome exploration (Canada) Limited formerly held claims along the gueo3c border east of the south end of Atkinson Lake. This area is intecprstad to be underlain by mafic to intermediate metavolcanics.
-2- -Assess***!- fries fle*e*~h GfGt^ T^*** k, cs*
In the interest of rapid dissemmmtiom of the resmUt comtmmeel m this Report, eome of the data may not hmve been meticulously checked. Thus the OGS doe* not guersmsee tste oeemmey of tnree figures ornd suggests the reoder cheek original source*. * 96 l A single 146 i deep diamond drill hole was sunk in 1970 and intarsected mafic metavolcanics interbedded witn cherty mineralized * zones and minor ultramafic rocks. The mineralized zones , 30 to 2UO cm thick, ire cherty tuffs with 20-30 percent pyrrhotite and pyrite and minor chalcopyrite. The sulphides occur as disseminations, blebs and * stringers. No gold or silver was found in the assays but copper ranged from 0.06-0.24 percent and zinc ranged from a trace to 0*4 per z ei 1 1 -H — *-lrrr-rtr- 7^^ n ^ Fjiog, poeo^T-^h nffi^.a, —Toronto, — Qnt.) . E
FAL^aSBHIOGS HICKEL/tfMINES LIMITED (1976) (19) l
^ Falsoaoriige Nickel Mines Limited formerly held 20 claims in Bradette and st. Laurent Townships south of the Burntbush River. The ground is interpreted to be underlain by felsic to intermediate tuffs. l In 1976 Falconbridge carried out a ground magnetic and survey over the ground which had been previously explored oy Bio Tinto Canadian Exploration Limited (see property description No. 39). The survey reaffirmed the location of Rio Tinto's an 001 al y and no further work was carried out.
GEOPHYSICAL ENGINEERING AND SURVEYS LIMITED (1957) (23)
A gc Dip of claims originally held by MarDano Mines Limited had .further exploration work carried out on them by Geophysical
In tke Mtera* of rmpid dimtmmrti** of the \*mitt contain** m Urn Jttfport, tome oftlteJmta may mot houe been meticuiotuly cheeked. Utm tme OGS doet mot fttmttee the mcatmey of them fignnt end m*t** the nmdtr chock ongmml eowcem. 97
Engineering aid Surveys Limited. The portion of the claim group f or .neely held by Geophysical Engineering is along the southern boundary 3f the aap area in the east half of Steel eTownship. Lumbers (1962, p.43) described the showing and the work accomplished.
"Ths sast showing is 2 chains north of the Trans-Limit road and may be reacaei oy following a trail, 3 chains east of the gravel pits in T lot 2, concession II, Steele ^Township. The west showing is 26 chains ease and d chains north of mileage 56 on the Trans-Limit road.
Both showings are in gossan-capped shear zones within the Steele VDlsaaiJs. At the east showing, the shear zone area is about 5 chains * o o wide, his an average strike of N.7C+W., and dips 80+N.-70+S. The shear zone has been explored by four pits and two diamond-drill holes.
Froji ths south, the first pit is 3 chains north of the Trans-Limit s road, near the south boundary of the shear zone area. The pit is i L-shaaei and 3-10 feet deep. A drillhole, inclined at 50 degrees along N.51+E, is at the elbow of the two arms of the pit, each of which are 6 faet wide and 20 feet long. A second pit, 4-10 feet wide, i 60 feet long, and 10-15 feet deep, is 100 feet northeast of the o first. A drillhole, inclined at 45 degrees along M.60+E., is situated at ths south end of the pit. The third pit, 8 feet square and 3 feet r * i deep, is 40 feet north of the second. A fourth pit occurs immediately north of the third and is U feet wide, 22 feet long, and 2-3 feet
^ In the interest of rapid dimeminatio* 9f Ut* i*mlt* eomtmmtl m tkit Report, tome of the 4mtu mty mat hoot been meticufoudy checked. Thug the O6S doe* not guarantee the eccmtecy 9f tkeet figure* mmd mtfffttt tke reefer check ohginml eources. m 98
* deep. c Amphibole schist, massive silicified roclcs, and quartz stringers are * comioa within the shear zone. Garnet is locally developed in amphibolite on the north border of the shear zone area, and porph/ritic basalt occurs to the south. The mineralization, as seen v in th2 four pits, consists of massive and disseminated pyrite and ^ pyrrhotite, and rare disseminated chalcopyrite. Massive pyrite and t pyrrhotite occur in layers, up to 8 inches thick, concordant with the x t strike and dip of the shear zone. Traces of copper, lead, -#lnc, nickel, gold, and cobalt were obtained from grab samples taken by the i author for assay from each of the four pits. r a. Two shear -SO ne s, one 100 feet north and the other 60 feet south of the line separating claims L. 65287 and L. 55282, occur at the west o S shoeing, ihe northern shear zone strikes N.8C+H. and dips vertically. It aas an exposed width of 45 feet, and two pits, one 8 feet square and 4 feet deep and the other 2 feet wide, 18 feet long, and 3 feet l d e e D, have been opened up. The shear has been further explored by a
* Airili'hole drilled south at an angle of 50 degrees at the first pit t and -*"*o shear zones, one 100 feet north and the other 6C feet south i of the line separating claims L. 65287 and L. 65282, occur at the west showiag. Ihe northern shear zone strikes N.80+W. and dips vertically. It has an exposed width of 45 feet, and two pits, one 8 feet square t and 4 faet deep and the other 2 feet wide, 18 feet long, and 3 feet deep, have oeen opened up. The shear has been further explored by a
* /H tht intern* of rmpid dmeminmtton of the remit* contmined m this Report, tom* of the dmtm mty mat km checked. Thut the OGS do** *ot guarantee th* tcamcy of thtte figures and migi*** the render check origi 99
drillhole drilled south at an angle of 50 degrees at the first pit and a.iDtner drilled S.6 + H. at an angle of 64 degrees at the second pit.. Passive pyrite, occurring in layers a few inches thick, is a. a aDuacWnt. Disseminated pyrrhotite is common, and chalcopyrite is cars. Aiphibole schist, quartz stringers, and silicified rocks predominate within the shear zone.
The sDutaarn shear zone, striking N.70+H. and dipping 80+N., is o. expjsed in-d" pit, 3 feet wide, 30 feet long, and up to 5 feet deep. AfflpaioDle-'mica schist and narrow guartz stringers are host rocks to massive pyrite stringers and some disseminated pyrrhotite. o. ChdlcDp/rite is Ddre. A diamond-drill hole, drilled south at an angle of 56 degrees, is legated at the north end of the pit.
Grap 3 d tuples, collected by the author from each of the three pits showed traces, upon assay, of copper, lead, zinc, nickel, gold and cobalt. Drill core from the five holes drilled in the various showings was not avdlLffble for inspection."
All the pits and diamond drill holes described by Lumbers are either in the tip-area or close to the boundary of the map-area.
GEOPHYSICAL ENGINEERING LIMITED (1976) (21) l Seoph/sicdl Eagineering Limited formerly held six claims in the ceniral partion'of Hoblitzel Township and are interpreted to be
In the interest of rapid dmemination of the remit* contain** m tkm Report, e*me oftkedmtm may not hi checked. Thus the OGS doe$ not guarantee the accuracy of thote figure* and mitjfrttt tke reader cheek original * 100
E underlain by aetasediments^^In 1976 a ground electromagnetic survey was c i r ria d out and a 76 a deep diamond drill hole was sunk to test an anomaly. The rocks intersected were highly metamorphosed sediments * with disseminated pyrite and pyrrhotite mineralization. The results fro* assays were disappointing 1. H — Ajjajsjmcinl rilos, nooearch offica, Toronto?— 3nt-4-. l
GEO? dY SI CAL ENGINEERING LIMITED (Noseworthy Properties) (22)
* In 1973 Geophysical Engineering Limited held twelve unpatented claims in three groups in the southeast quadrant of Noseworthy Township. Th*/ are numbered L.362899 to L. 362902 inclusive, L.U37981 to t L. 437986 inclusive, L. 393335 and L. 476881. The two claim groups on the eastern and southern borders are interpreted to be underlain by felsia to intermediate metavolcanics while the third group is t interpreted to be underlain by metasediments. t In 1976/tfthree diamond drill holes were sunk for a total depth of 267 m. t m. One nole was drilled in each cl^im group. The diamond drillhole near the Noseworthy Bradette Township boundary intersected interiediate tuff with interbedded metasediments with up to 15 * percent disseminated sulphides. The diamond drill hole near the Burntoush Kivsr intersected felsic to intermediate metavolcanics with * a 13 m thick graphitic zone containing minor pyrite. The top 30 m of l this hole is badly fractured and altered to hematite and may be a fault zone. The final hole intersected metasediments with minor
* A T* r** 4* j 0*
In tkt interest of rvpirf 4mtemmutwt *f flto i+mttu cotiimmed m tbm lUport, tomt of the 4mtm muy mot hove been meticwtotttly TTim fftf fTTTrfnti ma( f*memtn fftr tt mwij ttffhtm JUjiiiM aurf m&ttft ffti iMrin iftiift ui^niif IUIIILIII. fe 101
* intarbeidad matavolcanics. Mineralization consisted mainly of ft pyrrhotite occurred within the metavolcanics in thin massive sulphide i zones* Assay results on all the mineralization in the three holes * were discouraging 1. f-4—AoOGjameuf Fil^b";—Ryja^aieh Offiooy Torontoi
E HUDSON BA* EXPLORATION AND DEVELOPMENT COMPANY LIMITED (1976) (23) l Hudson Say Exploration and Development Company Limited formerly held I 23 claims in north central Kenning Township which are interpreted to ba underlain by mafic to intermediate metavolcanics in the north and metasadimants in the south. Canadian Superior Exploration Limited had * previDusly conducted a geophysical survey over the southern portion of tha claims (see Property Description No. 8).
A gc DI a d electromagnetic survey was carried out in 1976 and located savaral anomalies. No further worJc was submitted for assessment credit.
HUDSON BAY EXPLORATION AND DEVELOPMENT COMPANY LIMITED (NOSEWORTHY
PROPERTIES) (24)
In 1978 Hadson Bay Exploration and Development Company Limited held 26 unpataated claims in three groups; B-4, B-6, B-7. The B-U group, L. 491140 to L. 491145 inclusive, is located in the south central of Noseworthy Township and is interpreted to be underlain by
In t** mtera* ofrmpid di*tmi**tio* oftktrtmltg co*t*i**d m tkm Rtport, tom* oftfudmtm may mot Tkut th* OG5 don notgumnt** (A* meuumcy of tk*o* figum md wtfccte the rornder check original towen. c
102
* metasediments in the north and felsic to intermediate metavolcanics ^ in ths south part of the claim group* The B-6 group; L. 491122 to L. 49 11 39 inclusive, is in the central portion of Noseworthy Township *tw t near tha durtubise iu*e-nship boundary and is interpreted to be underlain by lafic to intermediate metavolcanics.
* A grojnd electromagnetic survey was carried out over these claim groups in 1977. A single, intermittent conductor was found in group B-4. Sroup B-6 has a strong anomaly in the north and a weaker one in * the sDuth and Sroup B-7 has two strong conductors. Ho further work has baen submitted for assessment credit.
l HUDSON BAY EXPLORATION AND DEVELOPMENT COMPANY LIMITED (NASH LAKE
PROPS&TI) (25| l
t in 1978 Hudson Bay Exploration and Development Company Limited held a group of 21 claims; numbered P. 421083 to P. 421086 inclusive, P. 421143 to P. 421150 inclusive, P. 421152 to P.421155 inclusive, P.421179 to l P. 421182 inclusive, P. 421188, northeast of Atkinson Lake. Hudson Bay formerly aeld 118 additional claims in five groups. These claim groups were found in the region between the Quebec border and 79*43* i 0 ' west longitude and the Detour River and 49*45* north latitude. The claii group that is currently held by Hudson Bay is interpreted to be underlain by interbedded felsic to intermediate, mafic to t intanediata metavolcanics and metasediments. Previous work has been dona on some Df these groups. In 1959 Conwest Exploration Company
t In thf inter** ofrmfid dmrmimtiam ofti* umltt eottttmtd m Am Report, tomt oftk*4*m mmy mot km* tom meticulously checked. Thug thf OGS don notguermmtt* the mecmney of t**m fig*r** md mggtttn the mmtti e**cfc 103
Limited did aa electromagnetic survey along with subsequent diamond drilling southeast of Detour Lake, (see Property Description No.12). In 1968 Selco Exploration Company Limited did some diamond drilling northeast of Atkinson Lake (See Property Description Mo.U2).
In 1975 HJdson Bay did a ground electromagnetic survey over their scattered claim groups. The only anomalies that were checked were in the claim group northeast of Atkinson Lake. In 1976 five diamond drill holes totalling 56U m were sunk. All the diamonp drill holes intersected felsic to intermediate metavolcanics with disseminated pyrrhotita mi pyrite; locally up to 25-30 percent sulphides were encDuatarsd. One graphitic schist contained up to 80 percent pyrrhotite and pyrite as blebs and stringers*
JU31LANI CHEEK MINES LIMITED (1966) (26)
Jubilint Creek. Sines Limited formerly held 18 contiguous claims in the southeast corner of Kenning Township. These claims are interpreted to be underlain by mafic to intermediate metavolcanics in the north and metasediments in the south.
In 1956 a ground magnetic and electromagnetic survey was carried out over ths slaii group. A geological survey was also carried out but failed to find any outcrop. The magnetic survey outlined a strong northwest trending anomalie but no definite electromagnetic anomaly was found.
In tk* interest ofrmptd dmemuwtio* of (** i •••to eontmme* m f** Report, tome of tnt dmtu may not nant botn mettculotuty Tlut* tkt OGS doe* not gnejmntt* the MOMVC? of thorn ftgum mnd wjpcate the nmder check original towcn. C KESAGA3I SYNDICATE (1959) (27) i
C Kesigami Syndicate formerly held 8 scattered claim groups in the aorth part of the map area. Seven of these claia groups are found in the vicinity of Vandette Lake, They are in an area between the Detour C Rivar on tha vest, four kilometers north and south of a line running east through the south portion of Vandette Lake 3.2 km to the east of Vaaaette Lake. The remaining two claim groups are found south- C soutnedst of Hopper Lake. The geology in the vicinity of Vandette La*9 is interpreted to be interbedded mafic to intermediate, felsic ( to intermediate metavolcanics and metasediments. c In 1959 nine diamond drill holes totalling 818 m were sunk on these claim groups. Sulphides encountered in drilling were disseminated C pyrite and pyrrhotite in the metavolcanics and blebs and stringers of pyrite and pyrrhotite in the graphitic horizons. The two holes soucn-sout naast of Hopper Lake encountered minor pyrite and C pyrrhotits.
C MATIASAAl LAKE HINES (JARVI OPTION) (1976) (28) C i Lak* nines formerly held 3 claims along the west boundary e of ths idp-arsa in the north portion of Steel Township. The A C jndsrlyirn rocks are mafic metavolcanics bounded by metasediments to the nDrth and south.
In the interest of rapid dissemination of the nomte cowtem** m Mi Kffort, tame of (ft* 4ote mmy mot kmue been mcticitJMufy checked. Thug the OGS does not guarantee the accuracy of thwte fifflure* end mf f st* the rrarfrr check onginet eomne*. 105
During November 1975 to January 1976 a magnetometer and electromagnetic survey was completed on the group. Ten reasonable conductors vith magnetic correlations were outlined. While prospecting the property two areas of exposed lenses of massive pyrrhotite ani pyrite vere found.
NOKAHOA EXPLORATION COMPANY LIMITED (1976) (29)
C Nordndd exploration Company Limited formerly held 20 claims in the central and east central portion of Hoblitzel Township. Hetasediments are interpreted to underlie the claims. t In 1974 a ground magnetic and electromagnetic survey was carried out outlining four conductors. In 1976 a 102 m deep diamond drill hole C was sun* to test the most promising conductors. The whole intersected aetasedimsnts with minor interbedded mafic tuff and minor disseiinatei pyrite and pyrrhotite. C
* Noranda Exploration Company Limited formerly held 10 claims in the south portion of Tomlinson Township adjacent to the west boundary of the map-area. The area is interpreted to be underlain by mafic C metavalcanics.
In the interest of rapid aimeemmatiom of the remit* contained in this Report, tome of the data may not have been meticulously checked. Thus the OGS doee not gmarameee the accuracy of rhtee figure* and tuggetto the reader check original eourcet. 106
la 1974 d magnetic and electromagnetic survey were completed over the * O. area ^nd -a^single conductor was outlined.
* NOMNDA EXPLORATION COMPANY LIMITED (1974) (31)
Nonnda allocation Company Limited formerly held 42 claims in five claim groups in northern Hurtubise Township and southern Noseworthy lownsaip. The two claim groups east of the Burntbush River are interpreted to be underlain by metasediments while the two groups south of tha Burntbush River are interpreted to be underlain by felsic to intermediate metavolcanics. The remaining group is -d** interpratad to pe underlain by mafic to intermediate metavolcanics. t Orie of the claim groups south of the Burntbush River has had a '"J magnetic and electromagnetic survey plus diamond drilledone on a l portion of it in 1969 by United States Smelting, Refining and Mining l Compaay (See Property Description No.46).
I In late 1973 and early 1974 Noranda completed ^r^ground magnetometer f and electromagnetic surveys over the four properties. The claim groups in Hurtubise Township all possessed weak conductors without magnetic expression while the claim groups in Noseworthy Township had good conductors with correlating magnetic expressions.
NORANDA EiPLOBATION COMPANY LIMITED (RUDE LAKE PROPERTY) (32)
In 1978 Miranda Exploration Company Limited held 4 unpatented claims; t
(f In the interest oft** i m thm Report, tome ofthedmtm m*y mot have been ducked. That tht OGS toe* Hkf oeeunoey of tf*tm figure* mud mt^fttt the rvmdtr check origiitel toureet. 107
33 to L.4CC333 inclusive, vest of Bube Lake in Bradette Towiisiiip. They previously held 38 claims in five groups in the southern two thirds of Bradette Township. All the claim groups except *- for tue narthsrn one are interpreted to be completely underlain by felsic; to intermediate metavolcanics. The northern claim is bisected by the letasediment-metavolcanic contact. The claim group south of * the ourntbush River on the west side of the township had a geophysical survey carried out on it in 1965 by Bio Tinto Canadian Exploration Limited (see Property Description No. 39). t
* electcoa-e^e* survey was carried out on all four claim groups. All t ** L groups contained between 1ftV3 conductors, some with magnetic correlation. An 85 m deep diamond drill hole was sunk in the claim group just north of the Burntbush River on the west side of the I Township in 1976. The diamond drill hole was in felsic to intermediate metavolcanics and intersected a 5 m thick massive pyrite * *. with some interoedded block chert and graphitic tuff breccia horizon. ' In April 1977 on the fiube Lake property a 122 m deep diamond drill hole 'as sunk in felsic to intermediate metavolcanics with some * gra^nitij horizons. Assay results for Au, Ag, Zn and Ni were * disappointingX -H— Aaa'Sjjmant Filoa^ —Deaoarch Office,— Toronto/ — Ont ,)-. i f NOBAN3A EXPLORATION COttANY LIMITED (ATKINSON LAKE PROPERTIES (33) /l
In 1978 Norinia Exploration Company Limited held six unpatented P
In tht interett of rapid dimeminatio* of the rtmltt co*tmm*4 m ttut Rtfort, tome oftkedmtm mmy mot kane keen metictthmtly ch*ck*d. Thut the OGS don not fumn**t tke •convey of tkom fig*m mud tuggfttt t** roudtr chfdt ohgiitfl town*. * 103 t claims east and northeast of Atkinson Lake, numbered, P.413913, P.419D93 to P.419101 inclusive, and P.419107. Previous to 1978, 29 claims in four qroups were held in the region around Atkinson Lake. * The remaining group, northeast of Nash Lake is interpreted to be ^ underlain by interbedded felsic to intermediate, aafie to C intermediate aetavolcanics and metasediments. c la 1976 a ground magnetometer and electromagnetic survey was carried m out on all claim groups. The Nash Lake group has two conductors with C sporadic magnetic correlation while the group east of Atkinson Lake has one conductor with weak magnetic correlation. No significant geophysical anomalies were detected on the remaining two claim^-d^* C groups. c SORASDA EXPLOBATIOU COKPANX LIBIIED (DETOOE LAKE PROPERTIES) (34) C In 1973 Norania Exploration Company Limited held 33 unpatented claims in three groups, numbered; P.413917 to P.413919 inclusive, P.413921 i to ?.413924 inclusive, P.420452, P.420453, P.414686, P.414687, P.414713 to P.414716 inclusive, P.41472C to P.414722 inclusive, P.411166, P.424171 to P.424174 inclusive, P.424157 to P.424162 C inclusive, P.424121, P.424213, P.424153, P.424154. They formerly held 199 claims in eight groups located north of Detour Lake and south of 50*30' aorth latitude and from Hopper Lake east to the Quebec oorder. Two of these, still valid claim groups, are found north and east of Lawer Dstour Lake where they are interpreted to be underlain by
In the mtereet ofrofid dmtmimttinm of the remits eoojtomed m thm Report, tome of the doon mey mot hove cheeked. That the OGS doet mot gMoremote the oecmrocy of thorn fitnree omd mm**** the feeder cheek originol eourcet. * 109
* metasaiiaisnts and felsic to intermediate metavolcanics respectively. The third still valid group is east of Hopper Lake and is underlain by lafic aetavolcanics. 4 Froa 1974 to 1976 ground magnetometer and electromagnetic surveys vara carried out on all the claim groups. As a result of these * surveys, numerous conductors were found some of which had magnetic correlations. In 1977 and 1978 eight diaaond drill holes totalling f. 1009 i were drilled to test the conductors in the claim groups north C and aast Df Lower Detour Lake and east of Hopper Lake. Three holes drilled near Lower Detour Lake intersected intermediate to felsic matavslcaaicrs to the east and metasediments to the north. Sulphide * mineralization was not abundant and the assay results were disappointing^ -4-4 — flsspssmont Piles; — R^pflrrh Offi^pr-r— Toronto, — Qnt . ) .,. Grapnitic horizons appears to have been the cause of the conductors. C Fivs holes drilled east of Hopper Lake intersected predominantly mafic msta volcanics except for one metasediment rich hole. Pyrite and pyrrhotite was encountered as blebs and stringers in graphitic zones. C Assay results were disappointingl. (1 Ascaijament P^lee^— Research
NOfiANDA SXPL03ATION COMPANY LIMITED (HOPPER LAKE PROPERTY) (35) t In 1978 NDranda Exploration Company Limited held six unpa tented * claims; P.41U640 to P.ttlU6U2 inclusive, P.4U729, P.UU73a f P.U1U735, north east of Hopper Lake. Noranda formerly held 93 claims in 3
F**'* es**"*:**
In the interest o f rapid dinemination of tk* rnutt* tomttimrt m f** Report, come of the dote may not hoot been meticuloutly checked. Thug the OGS dot* not fttanntee th* eaumcy of th*ee ffgwvt mud mtfffiTi the remder check original fourcet. i 110
t' 09 * groaps found oetween 50*00' and 50+OU' north latitude and the Quebec border aal 79*51* west longitude. All the former groups and present l group are interpreted to be underlain by mafic mstavolcanics. E During 1975 Naranda conducted ground' magnetic and electromagnetic surveys on ill groups. Eleven conductors were delineated, some with i magnetic correlations. No further work has been submitted for assessment credit.
OGRIZLO, S. P. (1975) (36)
I De. S.?. Dgryzlo formerly held 27 claims in two groups. One group i staked along the Quebec border in central Bradette Township is interpreted to be underlain by felsic to intermediate metavolcanics. The other group was staked west of Hopper Lake and is interpreted to l be an i ac l a in by a large block of metasediment within the granitic batholith. i
I In 1975 Pdtino nines (Quebec) limited for S. P. Ogryzlo carried out a q roan I magnetic and electromagnetic survey. One conductor was found I in tfndatte Township and two were found west of Hopper Lake. No - * i further work w/ s submitted for assessment credit. l ONSdORE PST3DL3UH LIMITED (BURTON GROUP) (1965) (37) l Onsnore Petroleum Limited formerly held 16 claims on the northern
In the interest of rapid dmeminmtion of the ree*** ccntmmed m Out Report, tome ofthedmtm muy not hmae cheeked. That the OGS doe* not giurmntee the meaumey of them ftguret end mqrttt the reader cheek original c * 111
* boundary of Bradette Township. These claims are interpreted to be * underlain oy metasediments.
* In 1955 a ground magnetic survey outlined an easterly trending magnetic ridge which was tested by 3 diamond drill holes totalling 637 m. The holes intersected metasediments with minor disseminated * pyrite.
CANADA LIMITEE (1972) (38)
Penirroya C-effiada Limitee formerly held a numoer of claim blocks covering ten anomalous zones discovered by an airborne geophysical survey flown in 1971. The claim blocks are found between 49*52'30" and 4A33M5" north latitude and the Quebec border and 79*50' west longitude. These claim blocks are interpreted to be underlain by ataxic metavolcanics in the north and interbedded felsic to inteneiiita, mafic to intermediate metavolcanics and metasadiments l in tha south. a ;*
Sroand nagnetic and electromagnetic surveys were completed in 1972 to l check the airborne anomalies. Seven of t li e anomalies were interpreted * to ue caused by sulphides and 3 were interpreted to be caused by graphite.
In the mint* of rapid dmtminution ofth* rtmtltt eomtmmed m tkm Report, tomt oftht 4mU may mot mmo* teen mttteultnuly checked. Thm tit* OGS do** not guonnttf th* ecurmey of tmttt figum mitd m^ffttt t** rmudtr check original toturen. * 112
* Rio linto Canadian Exploration limited formerly held numerous claim groups in northern st. Laurent and Hurtuoise Townships, southeastern m Noseworthy Township and the southern two thirds of Bradette Township. * These claim groups are all interpreted to De underlain by felsic to intermediate metavolcanics.
C Durinq 1964 to 1965 Rio Tinto carried out a ground magnetic, electromagnetic and gravimetric survey over these claim groups. Numerous anomalies were outlined. Three of the more interesting C anomalies were checked in 1965 by diamond drilling. A single 91 m diamond drill hole sunk on the Hurtubise, St. Laurent township S boundary intersected felsic to intermediate tuff with a pyritiferous t graphitic tuff horizon. Assay results w^ere all under 0.1 percent copper 1. -tt— frga&jsmant Filos, E ac oar eh Offioa, Toronto, OnUfr* The anomaly on the Hurtubise, Noseworthy township boundary was examined *t i with 2 aiy^moni drill holes totalling 210 m. The two diamond drill holes ware in felsic to intermediate tuff with graphitic tuff conductors. Assays of pyrite mineralization were discouraging X,-f-4- *. o. i A Djg j a .11 d at i' Ilia a ? ncooaroh Office, iQsontQ, Onti).. A conductor /long * T the St. Laurent, Bradette /Township boundary was tested with a 121 m diaaoai drill hole and the conductor proved to be tuffaceous *M J^rgiilits* horizons with disseminated pyrite. The assay results were 4L disappoint ing 1. H AccQcsmonL riles, —Geaeapoh Olflitf, Iflronto, Ont-Tt** m * W in e^cly 1966 additional ground magnetic, electromagnetic and gravimetric surveys were done to check some of the previous anomalies
In tkt mttngt of rmpid dmtmm*tiu* of tke rvmltt fomtimed m thig Report, tomeoftbedvta mtmy not have been met* checked. Thtit the OGS doe* mot gttemmtee the eeaumcy of theee figure* end mtegtitv the reader check originel ttnirce*. * 113 t not diamond drilled. Three conductors were outlined, two with magnetic correlations but none with significant gravity correlation.
l RIO TINTD CANADIAN EXPLORATION LIMITED (1966) (40) l Rio Tint3 Canadian Exploration Limited formerly held three claims l along the Quebec border east of Atkinson Lake. These claims are interpreted to be underlain by mafic to intermediate metavolcanics. L In 1*59 Selco Exploration Company Limited drilled a portion of this [ property (see Property Description No.42). t In 1956 a magnetometer, electromagnetic and gravity survey was i conducted over the claims. A single conductor with a conformable magnetic anomaly was outlined. Two diamond drill holes were attempted but bota were abandoned in the overburden.
DEVELOPMENT COMPANY LIMITED (1975) (41)
Sanrana Development Company Limited formerly held 30 claims east of Sunday Laice. These claims are interpreted to be underlain by mafic to intermediite metavolcanics.
In 1975 d ground magnetometer and electromagnetic survey outlined a siajla weak conductive zone. No further work was submitted for assessment credit.
M tkm Mtfort, tom* of the *te iMy not hm* W*n m*ticulo**ty checked. Tkt* tin OGS AM* met gnewitin tt* eecwexy oftkam few MM! mg mf i the rvwf* FIGURE Stratigraphic column through the Detour Lake Gold Deposit. Information from /caoco Canada Petroleum Company Limited.
GENERALIZED GEOLOGICAL COLUMN SCALE 1" s 600'
.BASALTS
MAIN ZONE -INTERMEDIATE TUFF - 1O-2O' MINERALIZATON -CHERTY TUFF - 5'-10'
FELSIC TUFF- ULTRAMARCS - 10* - 300' 50' . XXX v X X > X x ——MAFIC TUFF -100* O o 0 o o o ——FELSIC AGGLOMERATE - t)0'-300' Oo0oo
•M^FIC TUFFS - 1000'
•ARKOSIC SEDIMENTS. OCCASIONAL BASALTS hundred to veverot thousand feet
^ — * 114 f " * SELCO EXPLORATION COMPANY LIMITED (1968) (42) l S e le o exploration Company Limited formerly held claims east and north E of Atkinson La le e. Mafic to intermediate met a volcanics are interpreted east Df Atkinson Lake and interbedded felsic to intermediate, mafic S to intecmadiate metavolcanics and metasediments are interpreted to be K north of Atkinson Lake.
In 1959 thrae diamond drill holes were XdttemPte^ on claims along the Qtieoec border east of Atkinson Lake. Two of the diamond drill holes wara abandoned in overburden and the third, 162 m deep, intersected mafic me td volcanics with blebs and stringers of pyrrhotite and pyrite. la 1968 two diamond drill holes, one east of Atkinson Lake and one north of Atkinson Lake, were drilled for a total of 326 m. Ihesa holas intersected mafic metavolcanics with minor gaobros and talc sAzhists. The diamond drill hole east of Atkinson Lake had an assay of 1.4 percent combined Ca and Ni over 0.6 ml. H— Aoae^ainsnt -HI -T, nn-irrh nffi~'ft, T-rnnfn, nnt ).-
SILVEfiPLACE MINES LIMITED (1966) (43)
* Silverplase Mines Limited formerly held 25 claims in the southwest corner of Adair Township and northwest edge of Hepburn Township. The ground is underlain by mafic metavolcanics with a wedge of * iatanediate to felsic me t a volcanic s in the middle portion.
fate* /fese**r4 o Wu* ^ T*
In the mterttt ofrmfid dmtfwtmtttom. *f f** rvwJC* comtmmtd m (M* Report, tom* oftktdmtu may not kuoe b checked, Tku* the OGS doet mot g*erm*ttt the ecc**mcy of theet figure* and m^rttt the feeder check origmet towve*. * 115
* In 1966 d ground magnetometer and electromagnetic survey was carried ^ out over the claims. Seven weak conductors with coincident magnetic anomalies wsra outlined. t
STANFORD SINES LIMITED (1973) (UU) w
* Stanford aines Limited formerly held 30 claims in the northwest
* quadrant ofby Abbotsford Township. These claims are interpreted to be underlainX? metasediments with a band of felsic to intermediate C metavolcanics in the middle. c In 1972 Stanford Kines carried out a magnetometer and electromagnetic m survey over the claims and outlined three strong conductors. In 1973 the conductors were tested with three diamond drill holes totalling 360 m in length. The holes were all drilled in metasediments except l for one which bottomed in felsic to intermediate metavolcanics. Narrow zones of pyrrhotite and pyrite, in combined amounts up to 80 percsit, were found in all the holes. Assay results were * disappointing!. H Asoocomont Files,—Rogo^rnh n-Ffi^o T Trtmntn,—nnt.) . I IRIANA EXPLORATION LIMITED (KENNING PROSPECT) (1957) (U5) i Triana ixploration Limited formerly held 162 claims in the southeast corner of Kenning Township. The ground is underlain by felsic to r intarieiiate tuffs, metagreywackes and "iron formation" folded into a Z-shaped structural. H Accouomont Filooy—Bcooaroh office, Taconto,
l In the intent of rapid domination of th* nmto eontmu*d m tkm Report, tome of the 4mtm mty mot koae been metic*io**ly checked. TJUa the OGS do** mot guannt** the oeaumcy of thorn figure* mud *io*^ *** r*a^ e**efc of*wi* *N*W**. 116
E In 1957 Triana carried out a ground magnetometer survey and a i reconnxJlsstfnca geologicBl survey over the property. The ground was then optioned to Cliffs of Canada Limited who did magnetometer and i geological surveys. t The magaatic "iron formation" occurs in lenticular pods and is f distinctly oanded and very contorted. The non-magnetic portion of the l "iron formation" usually predominates where ever it occurs with the magnetic "iron formation". The deposit is 727 m long, averaging 61 m in wilta and strikes northeast^ t^— aaajojmont Filoo f Hoooapoh Office l lorontoj — 3nt.) ^ The "iron formation 1* is composed of banded magnetite separated by layers of quartz, mica and amphiooles. The amphiboles are hsrnblenda and grunerite in a ration of 1: FilJGf— Baaoaeeh Dffioa t— T?rnnt", nn*.) . The magnetite is fine grained and constitutes from 20 to 50 percent of the rock.
J The raserves calculated from the geological and magnetic surveys were estimated to be U0,000 long tons per vertical foot of magnetic material 1. ~H— AcsftCuiaint Filoc t— Bosg.icrh Office, Toronto^— Qnt i ) , An * average of 2U.5 percent iron was calculated from 25 grab samples. The phosphorus, sulphur and titanium content is low. The apparent available tonnage was considered by Cliffs' geologists to be too low 9 and no further work was recommended for the prospect.
tm UK HI*))** frtfid dimtmuimtion of the rtmlt* comtmmt* m (Mi Report, mute ofthedmtm m*y mot hm* been meticulously ttotktd. Th~ t* OGS 4tt mot gwfrantee tk* mccun^ *f 0** ftttin* m*4 miggfttt the nmder check original sources. 117 S ONIIED SIATS* SMELTING, REFINING AND KINING COMPANY (1971) (U6)
United States Smelting, Refining and Mining Company formerly held 16 claims in two blocks in the northeast quadrant of Hurtubise Township. The underlying rocks are interpreted to be felsic to intermediate metavDlcaaics by the Burntbush River and mafic to intermediate meta volcanics on the claim block to the south.
A ground magnetometer and electromagnetic survey was carried out in 1969 oy United States Smelting, The anomalies in the north block were caused by overburden and a series of well developed parallel anomalies were outlined on the southern block.
The United States Smelting, Refinning and Mining Company subsequently withdrew from an agreement they had with Canadian Superior Exploration Limited and turned overall documentation to them. 3 a nidi aa Superior then drilled two diamond drill holes for 442 m in 1971 to test the south olock anomaly. These holes intersected altered 5 mafic: aatavDlcanics containing scattered zones of disseminated pyrite. 3 i REfriafiNCSS i Ayres, L.O.
1972: Saiie to granitic rock nomenclature used in reports of the
In the mtfrtmt *f rapid 4JMWMM6M* oftkt nmlti eootaMwf m tbm JUport, mtme oftkcdmt* mmy mat have been meticulously cktcktd. Tkm O* OGS 4*ti met jummmttt the meemrmcy of O*ue fig**** end m^fttt the vmdw check original sourcet. l 118
i Ontdcio Division of Mines; Oat. Div. Mines, HP. 52, p. 14.
l Bennett, 3., Brown, D. P., George, P. T., and Leahy, E.J. I 1967: Operation Kapuskasing; Ont. Dept. Mines, MP. 10, p, 98. C.
* BoissoimedU, A.N. i 196b: Aigomd-^ochrane, surficial geology; Ont. Dept. of Lands and * Forasts, Jap S. 365, scale 1 inch to 8 miles. Surficial Geology 19o2-1963. l
l 19o6: Glacial history of Northeastern Ontario 1. The Cochraae-Hearst Ared; Cdn. J. of Earth Sciences, Vol.3, No. 5, p. 559-578. i
if I Fdhciq, W. F . t Gducher, E. H. and Larochelle, A. t 1965: Paleomagnetism of diabase dikes of the Canadian Shield; Can. J, S of ciarta Sciences, Vol.2, No. 2, p. 278-298.
8 Fishac,. Richar,^ V. c 1966: RDCICS composed of Volcanic Fragments and their classification; Larth Science Review, Vol.1, p. 247-286.
hopkins, Percy, E. 119
Lr
. 1913: Notes on Lake Abitibi Area; Oitt. Bureau of Mines Annual Report, Vol.27, pt.1, P.200-21U. l
Irvine, T.d., Baragar, W.R.A.
1971: A quid- to the chemical classification of the common volcanic A s; Jan. J, of Earth Sciences, Vol.d, p.523-548.
Jensen , L. S.
197o: A new cation plot for classifying subalkaline rocks; Ont. Div, Hinss, SP.66, 22p.
Karviaea, W.O. and Hunt, D.S.
1976: 1975 Report of the Northern Regional Geologist and Timmins Resident Geologist p.62-72 in Annual Report of the Regional and Eesidanc Geologists, 1975, edited by C.fi. Kustra, Ont. Div. Mines, 21. P. 5*4, 146p.
LJ moec3, S.B.
1962: Steals, Bonis, and Scapa Townships; Ont. Dept. Mines, Geological Report 8, 50p. t 120 i 1963: Sjuth Patten River Area; Ont. Dept. Mines, Geological Report l 14 ' 43P" l H.N.fi. Special Paper 2 r 1967: AnnDta-tad Bibliography on Batallic Mineralization in the i *L t f i Regiois of Nor^nd^, Hatagami, Vald or Chibougamaa; Quebec Dept. of f* Natural Resources, S.P.2.
' sortnara siner Press
1975: Braad naw gold find confirmed by Amoco (Articlel ; The Northern in^r, iidcch 16, 1975, p.1 i 1975: Aifloco g^os underground on Detour gold find (Article); The f Northern diner, Oct. 28, 1976, p.1.
I 1977: Ainoco 1 s Detour Lake gold find gets major underground test t (article); Ih^ Northern Miner, Dec. 1, 1977, p.1. t fiowa, J.S. i 1972: Forest Regions of Canada; Dept. Environment, Can. Forestry Service, Pub. 1, No. 13CO, 172p. Accompanied by 1 map scale 1 inch to t 100 milas. * 121
* Sangster t D. F. i 1972: Pcecaabrian volcanogenic massive sulphide deposits in Canada: A * review; 3sol. Survey of Canada Paper 72-22, 44p. l Shklanka, Boman l 1968: Iron deposits of Ontario; Cnt, Dept. Wines, Mineral Besources Circular No.11, ^89p. i r Tantoa , T. L. k
1919: lae Harricanaw-Turgeon Basin; Northern Quebec; Geological Survey of Canada, Memoir 109, p***1*' i.
Thojison, aooert
* 19J6: Jsology of the Burntbush River Area; Ont. Dept. of Bines, Aaau.il Heport, Vol.US, p.6, p.U9-63.
Prest, V.K.
197D: quaternary geology of Canada; Geol. Survey of Canada Economic Geology rpt.1, 5th ed. p.676-76U.
Walter, Roger G. 122
1976: Fdcies Models No.2, Turoidites and associated coarse clastic deposits, Geoscience Canada Vol.3, No. 1, p. 21-36.
Wilson, B.C.
: uaology of the Twopeak lake Area, District of Cochrane; Ont. Seoi.. Survey Beport 18U, 38p. Accompanied by map 2U10, scale 1:31,680 (1 insh to 1/2 nile) . t 1C* B * 3278
E
t
I
t
l
l
t t
I Table 7: Information on Properties in the Burntbush-Detour Lake Area on file with the Assessment Files Research Office, Toronto, ar of December 31, 1978.
File Name Township or Area Property Type of Work Reference Number Amoco Canada Petroleum Co. Ltd. Atkinson Lake, Lower Detour Lake l DDH Amoco Canada Petroleum Co. Ltd. Hopper Lake 2 K, EM, DDH Amoco Canada Petroleum Co. Ltd. Sunday Lake, West of Sunday L. 3 Amoco Canada Petroleum Co. Ltd. Sjpunday Lake 4 DDH, X- Sec. J.R. Mowat (Asarco Expl. of Can.) Hurtubise Tp. 5 M, EM, DDH Asarco Exploration of Canada St. Laurent Tp. 6 M, EM, IP, G, GR, DDH Canadaian Superior Exploration Ltd. Adair, Abbotsford Twps. 7 M, EM, Glf, G, DDH Canadian Superior Exploration Ltd. Kenning Tp. 8 M, EM, DDH Canadian Javelin Ltd. Adair, Abbotsford Twps. 9 AM, AEM, EM, GR, DDH GR, DDH Canadian Nickel Co. Ltd. Lower Detour Lake, Hopper Lake, West of Sandy Lake 10 DDH Conwest Exploration Co. Ltd. Noseworthy Tp. 11 EM Conwest Exploration Co. Ltd. Atkinson Lake, Lower Detour L. 12 EM, DDH Dex Limited Steel Tp. 13 S, T, DDH Oighem Syndicate Adair Tp. 14 EM, DDH Dome Exploration (Canada) Ltd. Abbotsford, Case, Singer Twps. 15 AM, AEM, M, EM, DDH Dome Exploration (Canada) Ltd. Tomlinson Tp. 16 AM, AEM, M, EM, DDH Dome Exploration (Canada) Ltd. Bradette, Noseworthy Hurtubise 17 M, EM, DDH Dome Exploration (Canada) Ltd. Atkinson Lake 18 DDH Falconbridge Nickel Mines Ltd. Bradette Tp. 19 M, EM Geophysical Engineering and Surveys Ltd. Steel Tp. 20 DDH Geophysical Engineering Limited Hoblitzel Tp. 21 EM, DDH Geophysical Engineering Limt&ed Noseworthy Tp. 22 DDH Hudson Bay Expl. t Dev. Co. Ltd. Kenning Tp. 23 EM Hudson Bay Expl. i Dev. Co. Ltd. Hurtubise, Noseworthy Tps. 24 EM Hudson Bay Expl. 6 Dev. Co. Ltd. Atkinson Lake, Lower Detour L. 25 K, EM, DDH Jubilant Creek Mines Ltd. Kenning Tp. 26 M, EM, GR Syndicate Atkinson L., Lever Detour Lake, Hopper Lake 27 DDH Mattagami Lake Mines Steel Tp. 28 M, EM, GR Noranda Exploration Limited Hoblitzel Tp. 29 M, EM, DDH Tomlinson Tp. 30 M, EM Hurtubise, Noseworthy Tps. 31 M, EM Brodette Tp. 32 M, EM, DDH Atkinson Lake 33 M, EM Hopper Lake, Lower Detour Lake 34 M, EM, DDH Sunday Lake, west of Sunday L. 35 M, EM Ogryzlo, S.P. Bradette Tp., west of Sunday L. 36 M, EM Onshore Petroleum Ltd. Bradette Tp. 37 M, DDH Penarroga Canada Ltd. Hopper Lake, Lower Detour L. 38 M, EM Rio Tinto Canadian Expl. Ltd. Bradette, Noseworthy St. Laurent Tps. 39 M, EM, GV, DDH Rio Tinto Canadian Expl. Ltd. Atkinson Lake 40 M, EM, GV, DDH Sarafand Development Co. Ltd. Sunday Lake 41 M, EM Selco Exploration Co. Ltd. Atkinson Lake 42 DDH Silverplace Mines Ltd. Adair Tp. 43 M, EM Stanford Mines Ltd. Abbotsford Tp. 44 M, EM, DDH Triona Exploration Ltd. Kenning Tp. 45 M, EM, G, GR United States Smelting, Refining t Mining Co. Hurtubise Tp. 46 M, EM, DDH
Abbreviations used:
DDH Diamond Drilling M Magnetometer Survey G Geological Map GR EH Electromagnetic Survey Geological Report I* Induced Polarization Survey GV Gravity Survey S Stripping AM Airborne Magnetometer Survey T Trenching AEM Airborne Electromagnetic Survey X-sec. Cross Sections LEGEND
PHANEROZOIC CENOZOIC QUATERNARY RECENT Swamp, stream, and lacustrine deposits PLEISTOCENE Till, clay, sand and gravel deposits Unconformity PRECAMBRIAN LATE PRECAMBRIAN (PROTEROZOIC) MAFIC INTRUSIVE ROCKS 8a Quartz Diabase Intrusive Contact EARLY PRECAMBRIAN (ARCHEAN) MAFIC TO INTERMEDIATE INTRUSIVE ROCKS 7 Unsubdivided 7a Diorite FELSIC TO INTERMEDIATE INTRUSIVE ROCKS 6 Unsubdivided 6a Quartz monzonite 6b Granodiorite 6c Pink granite 6d Quartz diorite 6e Feldspar porphyry, quartz, feldspar porphyry 6f Granite gneiss 6g Pegmatite 6h Felsite 6j Trondhjemite Intrusive Contact METAMORPHOSED MAFIC AND ULTRAMAFIC INTRUSIVE ROCKS 5 Unsubdivided 5a Gabbro 5c Amphibolite 5d Ultramafic rocks 5e Porphyritic gabbro Intrusive Contact METASEDIMENTS b CHEMICAL METASEDIMENTS 4 Unsubdivided 4a Ironstone 4b Chert CLASTIC METASEDIMENTSb 3 Unsubdivided 3 a Wacke 3b Arenite 3c Arkose 3d Calc-silicate rock 3e Grit 3f Fine grained to very fine grained, graphitic metasediments and tuffs 3g Schist 3h Garnet 3j Biotite 3k Amphibole 3m Staurolite METAVOLCANICS . FELSIC TO INTERMEDIATE METAVOLCANICS 2 Unsubdivided 2a Flow 2b Tuff 2c Lapilli tuff 2d Pyroclastic breccia 2e Tuff breccia 2f Porphyritic (feldspar phenocrysts) 2g Garnet MAFIC TO INTERMEDIATE METAVOLCANICS5 l Unsubdivided la Flow Ib Tuff le Lapilli breccia, pyroclastic breccai Id Autoclastic breccia le Pillow lava If Amphibolite lg Porphyritic (feldspar phenocrysts) Ij Garnet Ik Biotite G3 - Metasediments interpreted from geophysical data G4a - Ironstone interpreted from geophysical data NOTES; a) Subdivisions of major rock units do not indicate age relationships. b) Age relationships between units l, 2, 3 and 4 are unknown SOURCES OF INFORMATION
Geology by G.W. Johns and assistants, 1978. Records of Assessment work on File in the Research Office Ontario Geological Survey, Toronto. Amoco Canada Petroleum Company Limited Maps. Ontario Department of Mines Map 2018, Steele Bonis and Scapa Townships, District of Cochrane by S.B. Lumbers 1959, Ontario Department of Mines Map 2025, South Patten River Area, District of Cochrane by S. B. Lumbers 1960. Ontario Department of Mines Map P 373. Burntbush River Sheet by G. Bennett, 1966. Ontario Department of Mines Map P 371, Kesagami Lake Sheet by G. Bennett, 1966. ODM - GSC Aeromagnetic Maps 2366G, 2367G, 2368G, 2369G, and 2370G 1964. Base Maps Derived from Ontario Division of Lands, Forest Resources Inventory Maps SMC 4117, SMC 4118 and 501793. Magnetic Declination 11 west. 8-Biotite Granite 7-Feldspar Porphyry 6-Diabase 5-Amphibolite 4-Diorite Complex a Diorite b Quartz Diorite 3-Andesite-Diorite complex 2-^nyolite Tuff l -Andesite a ilas s i ve b Pillowed c Scnistose d Tuffaceous e Calcareous f Amygdaloidal g Variolitic
FIGURE O Geology of Asarco Exploration Company of Canada Ltd's leased claims in St Laurent To^nsnip Geology by Asarco. 80-001 . 49-30' 79-30'49-30*
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