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•*VJi'."v -•^Vv^.- ^•i;.^1A^^li r';^'l- : ••*VF -- ~ '•••:vV 84*30' F*3 -f F*2 * Ti 47'1S' MARGINAL NOTES morphic rank of the supracrustal rocks (metasedtments and mafic ABBREVIATIONS **?.f Ministry of * ? ^ volcanic rocks) is upper amphibolite accompanied by partial melt Northern Development ing and recrystallization with the development of coarse-grained Pb...... Lead Ag...... Silver Location and Access ^| v ^ quartz and Ht-paHti neosome This rank of metamorphism accom and Mines panied by anatexis is found only in the northwestern part of the po ...... Pyrrhotite Au ...... ,. Gold Ontario The Batchawana Synoptic Protect map area is located in the supracrustal belt This may be due lo the higher waier content py ...... Pyrite Co...... Cobalt Districts of Algoma and Sudbury, and is bounded by Latitudes more extensive within the metasediments which would allow for ...... Quartz bp ... .. Chalcopyrite 46CE6© to 47*30© and Longitudes 83030© to 64*50©. The approxi fluid migration for recrystallization /©.~3- .*:/- © q...... mate area of 5000 Km2 covers B1 townships and 8 unsurveyed qv ...... Quartz vein Cu...... Copper C. :. .i: Mines and Minerals Division r-*W - : Is available by all weather roads, ; Ljo. ,;--.:^,^. Jit-©l".,.©. ©-, - © "-©:-©*~i ;. ,. " .©©f © N/V * .^-; f;©--^ \5k to the region *s Survey areas. Access serp...... Serpentine Fe ...... Iron " l "f- ©* Ontario Geological togging roads, and the Algoma Central Railway line; numerous Structural Geology l v^© w ? rivers and lakes also provide access by boat and float-equipped sh .....,...... Shale gf ...... Graphite l ;.i.Y^ ^ © © ©- MAP P.3062 i. :^©:^- /; /f. aircraft. A hydro-electric powerline and accompanying access The supracrustal rocks of the Batchawana belt can be divided into Si...... Silica gn .., ...... Galena road passes from the Mississagi River hydro-electric dam system two tectonic domains which are distinctly defined by their fabric Geological Series-Preliminary Map - v" through Handleman. Ewen, Butcher, Sherratt, Scriven, Moggy, and de forma t tonal structures. The earliest structural fabric is a i...... ,.,.. Slate hem ...... Hematite ^EEVER TP ^ Moen, Hammond, Ha l let l. and Emiry Townships. northeast-trending schistosity which occurs parallel to the north V _ p...... Sphalerite \f ..... Iron formation primarily in the VJT SMILSKY TP A three-stage hydro-electric power dam system is located at east trend of the first volcanic cycle Occur ing spec ...... Specularite mag ...... Magnetite the western end ol the Montreal River reservoir. Power generating metavolcanics of Palmer, Wishart, Olsen, and Davieaux Town "PRECAMBRIAN GEOLOGY dams are located in Home, Peever, and Rix Townships. Several ships. The schistosity follows a regular trend, except where it U ...... ,...... Uranium .... Magnesium power lines extend southward from these generating stations in follows the margin of the Griffin Lake Stock in Norberg Township. W ...... Tungsten . Molybdenum the In the northeastern part of Davieaux Township, the schistosity the western part of l he region. Access into the central part of Zn ...... Zinc ...... Nickel Batchawana Synoptic Project map area is by the Algoma Central Railway line which operates becomes predominantly northwestern trending. The trend changes Nl bolh freight and passenger service with scheduled stops within abruptly and is marked by several faults and shear zones. The the area. Float-equipped aircraft service is available tn the Village central sedimentary basin in Vibert, Tronsen, Raaflaub, and Run Mamainse Point-Pancake Bay of and in the city of Sault Ste. Marie. Helicopter nalls Townships displays irregular bedding and schistosity fabrics. service can be obtained from Sault Ste. Marie and Sudbury. Three This is due to the local deformation caused by the intrusion of the - ^ ^- , hard-surfaced all-weather roads provide access into the map area Mongoose Lake and Grey Qwi Lake Stocks. The sedimentary basin ISU20+K20 MgO Al ,, Sheet Highway 17 extends northward from Sault Ste Marie along the is bounded by a major east-trending fault in Olsen and Davieaux Figure 2: AFM and AI-Fe -t- Ti-Mg diagrams displaying the . " . District of Algoma ;; ^^ ^ eastern shore ol . Highway 129 is located just east Townships and is non-com f ormabie with the tholeiitic rocks of the dominat tholeiitic trend of the western volcanic domain. SYMBOLS to the eastern part of the of the map area and provides access first cycle. The sedimentary basin conformably overlies the sec Gneissosity; -*©©"~- -V"-" Scale 1:50000 map area. Highways 556 and 531 provide access to Searchmont ond cycle of calc-alkalic and tholeiitic volcanism, as shown by Shear FeO (total) (horizontal, inclined, and the southern and eastern parts of the map area respectively. transitional facies sequences in Way-White and Runnalls Town vertical) Metres 1000 o l Kilometre extending eastward from Highway 17, are Gravel haulage roads, ships. Multiple fold, arrow Mile l O l Mile located along the Harmony River, the Batchawana River in Kincaid A major northwest-trending, eastward-dipping synclinal axis indicates plunge the Montreal River. The road along the Foliation; (horizontal, Township, and along extends from the northwest corner of Lunkie Township to Runnalls vertical) Montreal River is a private access road and permission lo use it inclined, Township and marks the zone of juxtaposition of the later calc- Area of bedrock NTS References: 41 K/15; 41 N/2 must be obtained from the Great Lakes Power Company in Sault alkalic volcanic cycle with the tholeiitic volcanic rocks of the first Ste. Marie. Access into Olsen and Davieaux Townships is made outcrop Banding; (horizontal, ODM-GSC Aeromagnetic Maps: 2187G, 2188G cycle. This northwesterly trend is the dominant schistosity of the inclined, vertical) along log haulage roads from the main Harmony River haulage of volcanic rocks OGS Compilation Map: 2419 southeastern part of the belt The second cycle Bedding, top road. Palmer Township can be accessed from a road north of are overturned and possibly thrust over the earlier tholeiitic vol Batchawana Bay The road access along the Batchawana River is unknown; (inclined, Lineation with - . ,. © canic rocks. This appears to be the case in the Desbiens-Lunkie vertical) poor, particularly east of the Tribag Mine site; however, all-terrain Townships area where a northeast-dipping syncline is overturned plunge ; cycles can negotiate the old unmaintained haulage roads with and intersects major east-trending faults in Davieaux Township, Queen©? Printer for Ontario, 1987 . little difficulty. The Batchawana River Road extends north of Wart The axial plane of the overturned syncline was reactivated as a Bedding, top Geological Printed in Ontario, Canada - . Lake into Runnalls Township. An alternative maintained forest tholeiitic volcanism and indicated by arrow; boundary, position thrust zone between the early first cycle Parts ol this publication may be quoted if credil is access road, extending as far as the Tribag Mines site, branches the second cycle. (inclined, vertical, interpreted Highway 17 in Kincaid Township. Roads into overturned given and the material is properly referenced. off at "Mile 67" on with a northeast Lake Superior Provincial Park are restricted and permission must The northwesterly trending syncline merges provides evidence Lineament or fault This map is published with the permission of V.G. be obtained from the park administration tor vehicle access. erly trending syncline in Runnalls Township and that these two volcanic domains are part of the same sequence. Bedding, top (arrow) Milne. Director, Ontario Geological Survey. Access into the eastern part of the area is provided from The northeastern volcanic rocks of the Cow River area are a distal from grain gradation; Lineament 44^ Searchmont along either Highway 556 or Highway 129. Access facies equivalent of the volcanic rocks in Gapp Township. The (Inclined, vertical, from Searchmont is along the Whitman Dam Road through overturned) dominant structural grain of the northeastern group is a north Jointing; (horizontal, Daumont and Hynes Townships, northward into Lunkie and Gapp easterly trending schistosity . 10' where it joins inclined, vertical) Townships, where it is known as Teepee Lake Road a major Bedding, top (arrow) extends eastward through Gaudry, The northwesterly trend within the belt is part of with the "Domtar" road which part of from crossbedding; Townships. The "Domtar" road extends north regional lineament and fault trend within the south-central Drag folds with Pine, and Mcilveen the southern part of the Superior Province This has controlled the (inclined, vertical, into Wlasy Township as far as Quinn Lake. Access Into Gapp and plunge of diabase dikes that have intruded the area in al least MgO Al overturned) Desbiens Township is by a haulage road west of Hanes Lake in network N820+K20 Gapp Township. This poorly maintained road extends as far west four episodes (Shaw 1985). Figure 3: AFM and AI-Fe * Ti-Mg diagrams showing the mixed tholeiitic and Anticline, syncline, -_- A northeasterly lineament and fault trend is also present of the map area. Lava flow; top in with plunge as the Algoma Central Railroad line at the Mekatina slop. Access calc-alkalic volcanic trend in the southeastern and eastern part direction of arrow into Gaudry and Bracci Townships is by a haulage road located within the area, and although not as abundant in terms of num Domtar road and bers, the lineaments and faults are long ^25 km), extending in feet approximately 1 km west of the junction of the Fe3 * Fe2 * Ti flow; top Shaft; depth haulage roads from westward into Lake Superior. Features such as the Montreal River FeO (total) Lava the Teepee Lake Road. Various unmaintained (arrow) from pillows provide access into Nahwegezhic, Pine, Mcil Fault, the Fault, and the Batchawana River the ©Domtar©© road shape and packing Age of rock in Ma veen, Hoffman, and Handleman Townships. Most of these roads Lineament/Fault define this northeasterly trend, and are related to require four-wheel drive or all-terrain vehicles for access the Kapuskasing Subprovince Structural Zone. These faults may Dike observed; interpreted from be related to the early development of regional structural patterns Schistosity; interpreted from parts of the map geophysics; Access into the eastern and southeastern at least 2715 Ma and have a history that extends into (horizontal, inclined, topography in Mcilveen Township which of area is along the Gong Lake road Keweenawan and the subsequent development of the Late Supe vertical) extends northward as far as the Ontario Hydro power line in Ewen rior Basin, Township. A four-wheel drive access road along the power line extends northwestward as far as the Cow River in Moggy Town ship. This road continues northward through Moen, Hammond, and Diabase Dikes Hancock Townships where it joins with the Pineal Lake road at Pineal Lake. This road extends east and north to Highway 129 at The Batchawana area has been intruded by a large number of Chapleau. Access into Neil and Sherratt Townships is by haulage diabase dikes. These dikes are mainly tholeiitic in composition MINERAL OCCURRENCES OF THE BATCHAWANA AREA road south of Pineal Lake. (Figure 5). The predominant strike of the dikes is northwest, which follows the tectonic fabric of the area Northeast-trend ing dikes Prop. Township Commodity Description that are difficult to access by road or water are Way- Areas related to later linear structures are less common. On the basis of No. of the Mon White and Runnalls Townships and most areas north paleomagnetic studies. Shaw (1985) has shown that at least four treal River reservoir, west of Hammond Township. ages of diabase dikes occur in the area: Late Archean 17 Peever U (Matachewan, 2647 Ma old); Sudbury; post-Huronian; and 18 Rix U Keweenawan. The Matachewan-type and Sudbury dikes have 19 Rix U General Geology been documented by the paleomagnetic work of Shaw (1985), the 20 Rix U . Diabase dykes dike cross cuts a Huronian outlier (Grunsky and . 21 Peever U LOCATION MAP Scale: 1:1 584 000 or 1 inch to 25 miles post-Huronian 22 Peever U - ^^^______\___ L _ j The following summary is partially synthesized from reports that Arengi 1977) and the Keweenawan dikes are associated with U into 23 Peever are listed in Table 1. The area can be subdivided geologically Keweewawan volcanics. Corfu and Grunsky (in press) also have 24 Peever U Altered granites four major lithotectonic domains of the Superior Province (Figure suggested that a titanite age of 2647 Ma from a crystal tutf in 25 Smilsky U Granites/gneiss t): the Chapleau Gneiss Domain, the Ramsey Gneiss Domain, the Nahwegezhic Township is the result of resetting by the intrusion N320+K20 MgO 26 Smilsky U f Algoma Plutonic Domain, and the Batchawana Volcanic Domain of a diabase dike less than 10m away, thus indirectly dating the 27 Peever U Diabase dyke AI-Fe * Ti-Mg diagrams showing the mixed tholeiitic-calc-alkalic (Card 1979). The Chapleau and Ramsey Gneiss Domains extend Matachewan intrusions. Figure d: AFM and 28 Slater U Cow River area. The calc-alkalic volcanics occur in the Neifl township area. eastward to the Abitibi-Swayze Volcanic Domain and were formed Siragusa (1982) has presented an overview of the characteris trend of the 29 Smilsky U by anatexis of supracrustal and plutonic rocks. The Algoma Plu tic features of the diabase dikes as follows: 30 Smilsky Cu of leucocratic granite and 31 Slater U tonic Domain is comprised primarily dominantly northwest-trending, are a F BO (total) The Chapleau Gneiss Domain is ©Diabase dikes, 32 Slater U i quartz monzonite (Card 1979). feature throughout the Batchawana-Ouinn Lake U LEGEND part of the Kapuskasing Subprovince. Recenl U/Pb zircon dating prominent 33 Slater U area, and are even more numerous than can be shown on the Slater U (Corfu and Grunsky, in 1987) indicates a late thermal episode 34 map. Foliation in the metavolcanics, and northwest-trending 35 Slater hem r;. PHANEROZOIC within this zone. The Batchawana Volcanic Domain can be sub regional fractures in all the Archean rocks, are apparently the 36 Slater hem : CENOZOIC divided into two major volcanic cycles (discussed below). Min. main factors which controlled the emplacement of diabase, 37 Rankin Cu QUATERNARY The Archean met a volcanic-met asedimentar y rocks have been 0.5 m to about Loc. The thickness of the dikes varies from aboul PLEISTOCENE AND RECENT deformed, metamorphosed, faulted, intruded by felsic plutonic 120 m, measured in a dike exposed over a length of 275 m in 3B Rankin Min. Cu ot diabase dikes The Lac. Sand, gravel, clay, till, swamp deposits rocks, and intruded by several episodes Desbiens Township. Occurrences of variably strained area is also partly covered by sedimentary rocks of the Huronian 39 Rankin Mm. Pb Zn Cu supracrustal rocks ©sandwiched© between closely spaced 1980). Loc. UNCONFORMITY Supergroup (Grunsky diabase dikes are not uncommon in the Batchawana-Ouinn within the Batchawana Volcanic 40 Rankin Mm. Cu Zn © The oldest volcanic cycle Lake area: because of this, clusters of diabase outcrops Loc. Domain consists of a sequence of tholeiitic flows and sills with PALEOZOIC . . showing no clear evidence of a preferred trend were generally US© J 41 Rankin Min. minor amounts of intercalated felsic tuffs and clastic sedimentary interpreted as areas underlain by two or more parallel or Loc. LOWER AND MIDDLE CAMBRIAN rocks. This western cycle extends from Palmer Township eastward converging dikes, rather than by a unique wide dike. Some ot 42 Rankin Min. JACOBSVILLE FORMATION into Davieaux Township. Geochronologicai. stratigraphic, and these clusters, however, are interpreted as isolated small Loc. early cycle of tholeiitic Rankin Min. structural evidence suggests that this intrusions of local character (e.g Dismal Lake area, Way-White 43 17 Undifferentiated volcanic rocks accumulated along an east-northeast-trending axis. Loc. Township). The dikes have fine-grained to glassy chill 17a Sandstone A later eastern cycle, comprised of a lower tholeiitic flow 44 Rankin Min. Cu i: margins, commonly contain pyritic disseminations, and may be Loc. sequence with an upper sequence of calc-alkalic mafic to felsic locally porphyritic with altered plagioclase phenocrysts up to CAMBRIAN from Lunkie Township to 45 Kincaid Cu Quartz vein in granite LOWER volcanic rocks, extends northwestward 6 cm in size Kincaid Cu Quartz vein in granite Moggy and Moen Town 46 MICA BAY FORMATION Runnalls Township and eastward into The diabase is massive, fresh-looking, grey-green to dark 47 Kincaid Cu ships. The relationship between the eastern and western cycles is weathers to z 43 Kincaid Cu Pb Ag© green, with a grain size of 1 to 8 mm. The rock 16a Arkose, siltstone, shale obscured, but it is possible that the contact Is in part conformable uniform or mot l led brown which typically penetrates the rock 49 Kincaid Cu and in part disconformable because of subsidence and faulting of 50 Kincaid sh Shale for only a few millimetres. A red-brown weathered surface is UNCONFORMITY the first cycle. Accompanying this subsidence, a fault-bounded, characteristic, although not necessarily diagnostic, of olivine- 51 Kincaid eerp Serpentine vein Tron N820+K20 MgO Kincaid Cu deep-water sedimentary basin was formed in the Vibert and bearing diabase." 52 Diabase dykes sen Township areas. With the onset of the second cycle calc- 53 Kincaid Cu Coarse grained flows or PRECAMBRIAN The dikes shown on the maps are interpreted from geophysi Figure 5: AFM and AI-Fe + Ti-Mg diagrams showing the tholeiitic alkalic volcanism in the Lunkie Township area, deposition of intrusions PROTEROZOIC . cal anomalies, and topographic outcrop exposures. Due to the trend of the diabase dikes. 54 Kincaid Cu pyroclastic tuffs and sediments occurred lo the northwest in the LATE PROTEROZOIC © © © is in part supported by the large number of dikes, nol all of them could be shown on the 55 Kincaid Cu sedimentary basin. This interpretation BRECCIA PIPES fining of pyroclastic material northwestward from Way-White maps. 56 Kincaid Cu Vein structure Township into Runnalls Township The stratigraphy and schistosity 57 Kincaid Cu Vein structure Cu .- matrix of sedimentary rocks in a northwest-trending pattern delineates 58 Kincaid I5a Polymictic breccia, quartz-carbonate 19S7 59 Kincaid Cu the axis of the second phase of deformation within the map area. Economic Geology 60 Kincaid Cu cp py of the UNCONFORMITY This trend typifies the fabric of the major tectonic elements Gl Kincaid cp py volcanic-sedimentary rocks throughout the entire belt. Accumula A total of 320 mineral occurrences, properties, and deposits have in metavolcanics 62 Kincaid Cu cp py Fault zone FELSIC VOLCANICS AND ASSOCIATED INTRUSIVE ROCKS tion of sediments within the major sedimentary basin subdomain been locaied within the Batchawana area. There have been two Kincaid Cu of small 63 possibly continued until intrusion of the felsic plutonic rocks and major copper producers (Proterozoic age) and a number References and Bibliography 1978b: Quinn Lake Area (Eastern Half). District of Algoma; Ontario . 64 McDonell Cu Vein subsequent arrest of tectonic activity. uranium deposits. No Archean base metal deposits of any signifi Geological Survey. Preliminary Map P.1834, Geological Se Hnrl. Loc. 14a Felsite have been discovered. Iron reserves in the Goulais River The first volcanic cycle is comprised of tholeiitic mafic cant size Anneils, R,N. ries, scale 1:15 840. 65 McDonell Cu 14b Quartz-feldspar porphyry Iron Range are currently considered too small and uneconomic to metavolcanic flows and sills in the western part of the map area. It 1973: Proterozoic Flood Basalts of Eastern Lake Superior: The 1982: Geology ol the Ouinn Lake Area, District of Algoma; Ontario Mnrl. Loc. commodity within the area is McDonell Cu more intercalated with metasediments and mine. Presently, the most promising Keweenawan Volcanic Rocks of the Mamainse Point Area, Geological Survey. Miscellaneous Paper 104, 11 p. Accom 66 becomes progressively gold. Mnrl. Loc. felsic tuffaceous horizons to the east. Pillowed flows are the most Ontario; Geological Survey of Canada. Paper 72-10, 51p., 2 panied by Preliminary Map P.2580. scale 1:15 840 or 1 inch Iron is present as magnetite-chert ironstone accumulates with plates, 4 figures, and 1 table. 67 McDonell Illite Felsite abundant mafic metavolcanics. These flows are typically 2 to to a 1/4 mile. Mnrl, Loc. 10 m thick and pillow sizes average O.5 (o 1.0 m across. Varying in the supracrustal volcanic sequence in several areas of the belt. Blecha, M. 1986: Geology of the Batchawana-Pangis Area. District of Algoma, The greatest accumulation of magnetite-chert occurs in the 68 McDonell Illite Felsite degrees of carbonate alteration parallel to the stratigraphy (and Ontario Geological Survey, Report 243. 56p. Accompanied Mnrl. Lac. MAFIC VOLCANIC ROCKS Range within Nahwegezhic and Gapp Town 1974: Batchawana Area-A Possible Precambrian Porphyry Copper foliation) was observed in some units Exposures of thick, massive Goulais River Iron by Maps 2479 and 2480, scale 1:31 680 or 1 inch to 1/2 69 McDonell Cu occurs in the northern part of Gapp District, CIM Bulletin, August 1974, p.71-76. flows and sills were observed in the McGovern Lake area. ships. A northern extension mile. Mnrl. Lac. 12a Basalt geochemical trend of the Township. The deposit is held by the Algoma Steel Corporation Card, K.D. 70 Montreal Cu Copper showing Figure 2 shows thai the dominant Thompson, J.E. metavolcanics is towards iron enrichment. Eastward into Davieaux Limited and currently the reserves are estimated at 30 480 000 1979: Regional Geological Synthesis, Central Superior Province; Mining Co. was carried out in INTRUSIVE CONTACT Township, the mafic metavolcanics are increasingly interbedded tons of iron pellets. Significant exploration work p.87-90 in Current Research, Part A, Geological Survey of 1954: Geology of the Mamainse Poinl Copper Area; Ontario De 71 Montreal Cu C zone the area during the 1940s, 1950s, and 1960s, however the deposii partment of Mines, Annual Report for 1953. Volume 62, Pan Mining Co. with metasediments and felsic tuffaceous rocks, suggesting a Canada. Paper 79-1A. 1979. EARLY PROTEROZOIC not considered to be economic. Magnetite-chert iron 1 inch to 1000 72 Montreal Cu source environment in the west to a more is currently 4, 25p, Accompanied by Map 1953-1. scale change from a proximal in the northern part of Palmer Township south of Corfu, F., and Grunsky, E.C. Mining Co. MAFIC INTRUSIVE ROCKS* in the east, The sequence of mafic stone also occurs feet. distal redeposited environment test pit was developed and approximately 1987 : igneous Tectonic Evolution of the Batchawana Green 73 Montreal Cu the northeastern part of the map Pancake Lake. A Wilson, B.C. to intermediate metavolcanics in 200 000 tons of ore containing 26 to 29*^ Fe have been outlined. stone Belt, Superior Province; U/Pb Zircon Titanite Study, Mining Co. 11a Diabase area is comprised of a sequence of pillowed and massive mafic Lake-Rotunda Lake Areas, Districts of A smaller unit of magnetile-chert ironstone occurs in the southern Journal Of Geology, Volume 95, Number 1, p. 87-105 1983: Geology of the Percy 74 Montreal Cu Ouarry 11b Porphyritic diabase flows with interbedded clastic metasediments, Algoma and Sudbury: Ontario Geological Survey, Report Mining Co. part of Palmer Township; it is not of sufficient width to be consid Giblin, P.E. ne Gabbro Metasediments are more abundant at the base of the the economic. Isolated magnetite-chert interbed units occur in 229, 32p. Accompanied by Map 2478, scale 1:31 640 or 1 75 Montreal Cu Copper showing ered 1969. Mamainse Point Area, District of Algoma; Or**rlo Department Mining Co. eastern volcanic cycle, as indicated by exposures east of Cowie several places within the Batchawana belt: northeasl Runnalls inch to 1/2 mile, Lake, along the north bank of the Montreal River reservoir, and the of Mines. Preliminary Geological Map P.554, scale 1 inch to 76 Nicolet Fe INTRUSIVE CONTACT Township; east of Wart Lake in Vibert Township; several zones 77 Nicolet Fe ©. - south limb of the syncline in Schembri and Moggy townships. In 1/4 mile (1:15840). near the southern boundary of the supracrustal sequence in TABLE 1 . GEOLOGICAL REPORTS AND MAPS OF THE BATCHAWANA AREA. 78 Nicolet Fe HURONIAN SUPERGROUP these two townships the character of the metasediments indicates Schembri Township: and remnants of the Goulais River Iron Range Giblin, P E., and Armburst, G.A. 79 Nicolet Cu COBALT GROUP a transition from an early distal to a more proximal mafic plain within the gneissic tonalites in Pine Township. All of these units 1973 Batchawana, , Ontario; Ontario Division of Year Author Area Publisher eo Nicolet Cu cp environment. The clastic metasediments are for the most part length. Nicolet Pb Zn Ag Gowganda Formation are thin, discontinuous and less than 100 m in strike Mines, Map 2251, scale 1 inch to 1 mile. 1925 E.S. Moore East Part of ODM Vol. 34 PL 4 81 weathering of the volcanic sequence, This suggests Nicolet Breton East, South, derived from E.C. Belt 82 Cu no w that this area was less active volcanically than other areas to the Grunsky. Batchawana West breccia zones 1926 E.S. Moore West Part of ODM Vol. 35 Pt. 2 6 Wacke, conglomerate, siltstone west. Base Metals 1980 Geology of the Cowie Lake Area, District of Algoma: Ontario 83 Nicolet Cu cp py Large ore deposit 67p. Accompanied by Map Batchawana Belt Development of the central sedimentary basin started during Geological Survey, Report 192, Au Ag UNCONFORMITY The most abundant type of mineral occurrence in the area is the 2426. scale 1:31 680 or 1 inch to 1/2 mile. 1936 N.B. Keevil N.East Part of GSC Map 366 A 84 Nicolet Cu W Mo py the early stages of the eastern volcanic cycle. This is evidenced base metal type. Copper, zinc, and minor amounts of lead occur Batchawana Bell by the coarse clastic metasediments and debris flows present in 1981 Geology of the Grey Owl Lake Area, District of Algoma; 85 Nicolet py cp Ho Cu ARCHEAN throughout the Archean supracrustal rocks. Copper, molybdenum, Ontario Geological Survey, Report 205. 76p. Accompanied 1946 E.S. Moore H.S. Goulais River Iron ODM Vol. 55 Pt. 4 86 Nicolet Cu cp py the northern part of the Runnalls and Raaflaub Townships. This py LATE ARCHEAN and tungslen occur in association with the Proterozoic rocks as by Map 2446. scale 1:31 680 or 1 inch to 1/2 mile. Armstrong Range 87 Nicolet Cu cp sequence fines upwards, becoming increasingly turbidite-like, fissure-vein deposits (Coppercorp Mine) and breccia 1953 Jas. E. Thomson Mamainse ODM Vol, 62 Pt. 4 88 Nicolet Cu Au cp py FELSIC INTRUSIVE AND RELATED METAMORPHIC ROCKS basin epigenetic deep-water facies metasediments. The central sedimentary pipe deposits (Tribag Mine). Base metal occurrences in the Ar Grunsky. E.C., and Arengi, J.T. Point-Keweenawan 90 Nicolet Cu rocks in the appears to be conformable over the northern group of chean supracrustal rocks are more common in the eastern and 1977: Cowie Lake Area, District of Algoma; Onlario Geological Vol. 95 Nicolet py the easl and Cu Pb Zn Ag 6 Undifferenliated Runnalls-Raaflaub Townships area and in areas to northeastern parts of the belt, where they occur within the calc- Survey, Preliminary Map P. 1562. Geological Series, scale 1955 E.W. Nuffield Montreal River ODM Vol. 64 Pt. 3 96 Nicolet by a 97 Nicolet Cu 6a Granite * southeast The southern margin of the basin is marked sequence. Many small sulphide occurrences 1:15840, Geology 1977. 1964 P.E. Giblin Nicolet Township ODM P 361 Townships area. This fault was alkalic metavolcanic 229 Ryan Cu cp py 6b Quartz monzonite distinct fault in the Davieaux-Olsen in Gapp. Lunkie, Way-White, Running, Run 1965 P.E. Giblin Palmer Township ODM P 710 top of the first (western) volcanic have been reported Keevil, N.B. 230 Ryan Cu probably active from at least the nalls, and Schembri Townships. These occurrences are primarily a 1965 P.E. Giblin Ryan Township ODM P 555 6c Granodiorite cycle since no volcanics of the second cycle overlie this group. 1936: Cow River Area; Geological Survey ol Canada, Map 366A. 231 Ryan Cu volcanic interflow accumulation of sulphides, consisting of pyrite, 1965 G. A. Armburst Wishart Township ODM P 364 Ryan . - Fe 6d Trondhjemite volcanics is marked by the presence scale 1 inch to 2 miles. Geology 1936. 232 The calc-alkalic cycle of pyrrhotite, and chalcopyrite. More significant amounts of sulphides 1965 G. A. Armburst Olsen Township ODM P 363 233 Ryan Cu 6e Tonalite of coarse felsic metavolcanic breccias of calc-alkalic affinity Kincaid Township ODM P 553 occur in Gapp and Runnalls Townships, where felsic pyroclastic Moore, E.S. 1966 P.E. Giblin 234 Ryan Cu (Wo) 6f Syenite-monzonite-syenodiorite (Figure 3) that overlie a significant accumulation of ironstone in rocks are more abundant. Alteration zones which are commonly and the Goulais River Iron Ranges, 1967 P.E. Giblin Norberg Township ODM P 359 235 Ryan Cu into calc-alkalic 1926: Mississagi Reserve t 6g Pegmatite the Cowie Lake area and grade northeastward associated with large deposits of massive sulphides have not of Algoma; Ontario Department of Mines, Annual 1967 P.E. Giblin Mamainse Point ODM P 554 236 Ryan Cu melavolcanic sequence is District © and tholeiitic basalts. The calc-alkalic previously been identified in the area, although zones of car Report for 1925, Volume 34. Part 4. p.1-33. Accompanied by 1968 P.E. Giblin Fisher Township ODM P 557 237 Ryan Cu 6h Aplite flows from the northwest. 238 Ryan Cu intercalated with mafic melavolcanic bonatization have been noted in the northern part of Gapp Town Map 34d, scale l inch to l mile. 1968 P.E. Giblin Herrick Township ODM P 556 6i Massive - and is overturned, (bedding and 239 Ryan Cu - . The sequence tops to the south ship by the author. Base metal occurrences in the western part of 1972 R.N, Anneils Mamainse Point S GSC Paper 72-10 6) Strongly foliated north). The felsic melavolcanic sequence con 1927: Batchawana Area. Algoma District; Ontario Department of 240 Ryan Cu schistosity dipping map area (Palmer, Ryan, Wishart, Olsen Townships) are less Alona Bay finer clasts and is progressively more sedimen the Mines, Annual Report for 1926, Volume 35. Part 2, p.53-B5. 241 Ryan Cu . . . 6k Moderately foliated tains increasingly common than in the east. This area is primarily underlain by mafic 1973 G.M. Siragusa Batchawana-Pangis OGS P 998, OFR 5345 tary in character near the top of the sequence (southeast). These Moore, E.S.. and Armstrong, H.S. (Western Half) 242 Ryan rig py i 6I Weakly foliated metavolcanics with minor intercalated sulphide-bearing units, but 243 Ryan Au finer metavolcanics extend northwest and into Way-White and Batchawana-Pangis OGS P 1193 6m Porphyritic no observed massive-sulphide type alteration assemblages. The 1948 iron Deposits in the District ol Algoma; Ontario Department 1974 G.M. Siragusa 244 Ryan Cu cp py Fault zone in metivolcani.es Runnalls Townships, where the tuffs become increasingly distal in abundance of sulphide-fich interflow units increases near the top of Mines, Annual Report for 1946, Volume 55. Pan 4, (Eastern Half) 245 Ryan Fe 6n Breccia character and are interbedded with metasediments. The geoch P 1833 PANCAKE of the sequence in the Tronsen-Davieaux Townships area. P 1-118. 1975 G.M. Siragusa Quinn Lake (Western OGS 246 Ryan Cu Copper fills zones in 60 Migmatitic-paragneiss ronology of the felsic tuffs in the central part of Desbiens Town Half) rocks is commonly found volcanics and sediments 6p Orthogneiss ship show that these are the youngest known supracrustal rocks Copper associated with Proterozoic Nuffield, E A 1976 G.M. Siragusa Quinn Lake (Eastern OGS P 1834 associations: native copper with barite in fissure-vein struc 247 Ryan Cu in the belt (Corfu and Grunsky, in press). It is not known conclu in two 1956: Geology of the Montreal River Area; Ontario Department of Half) BAY 248 Ryan Cu 6q With biotite ! . © the Keweenawan volcanic sequence, and sively whether or not the felsic metavolcanics in the Neill Town tures within Mines Annual Report for 1955, Volume 55. Part 3, 32p. 1977 E.G. Grunsky Cowie Lake OGS P 1562, GR 192 249 Palmer Cu 6r With hornblende © intrusive porphyry-brec ship area are contemporaneous with the northeastern group of chalcopyrite-molybdeniie-scheelile within Accompanied, by Map 1955-1 scale 1:31 680 1 inch lo 1/2 Grey Owl Lake OGS P 1562, GR 205 250 Palmer Co cp py the vol 1978 E.C, Grunsky - 6x Containing xenotiths malic metavolcanics as outcrop abundance is low in that area. cia systems. Several fissure-vein systems occur within mile. 1979 B.C. Wilson Rotunda-Percy Lake OGS P 2363, OFR 5309 251 Palmer Au Ag Co Cu sequence at Mamainse Point, the most important being the metavolcanics of the second cycle are composed canic (Western Half) 252 Palmer Mg INTRUSIVE CONTACT : The mafic Coppercorp Mine from which 1 294 247 tons of ore at 2. l "A Cu Shaw E primarily of pillowed basalts with intercalated metasediments. The 1979 B.C. Wilson Rotunda-Percy Lake OGS P 2364, OFR 5309 253 Palmer Fe was recovered. The Tribag Mine area consists of a series of 1985 Precambrian Dikes in the Eastern Lake Superior Region and 254 Palmer po py pillowed units are typically 5 to 10 m thick with a fine- to medium- (Eastern Half) © EARLY MAFIC INTRUSIVE ROCKS (METAMORPHOSED) . pipes in the southeastern parl ol Nicolet Township. The iheir Use in Defining Crustal Rotation Unpublished M Se 255 Palmer flow base, a medium- to coarse-grained flow cen breccia 1982 G M Siragusa Ouinn Lake Area OGS MP 104 py grained chilled ore zone, produced 37 257 993 Thesis University o* Toronto, 162p. 255 Palmer Cu 30"/o to Breton Pipe, the main Tribag 1983 B.C. Wilson Rotunda-Percy Lake GR 229 tre, followed by a pillowed layer constituting approximately 246 054 ounces of silver. The west breccia 257 Palmer Cu 5a Diabase - a fine-grained pillow breccia. In pounds of Cu and Siragusa. G.M . ^ 1963 G.M. Siragusa Rand Lake Map 2478. 2479 40"/!. of the flow thickness, then explored by the DeKalb Syndicate which out 258 Palmer Fe Tactonite deposit 5b Gabbro of higher metamorphic rank (Cow River area), these zone was recently Area (Western Half), District of Algoma: 1984 G.M. Siragusa Wart Lake Map 2480 the zones lined 28 000 tons of G.87% WO3 and 40 000 tons of 2.0* Cu 1975: Batchawana-Pangis 259 Palmer If Cu flow subdivisions zones can still be recognized. Com- of Mines. Preliminary Map P 998 Geologi Palmer Fe typical although no ore was ever removed The Jogran Porphyry deposit Ontario Division Abbreviations 260 INTRUSIVE CONTACT 4). 261 Palmer Au Ag Cu positionally these rocks are tholeiitic (Figure Cu-Mo-Ag mineralization, occurs in Ryan Township at cal Series, scale V15 840 Survey containing OGS - Ontario Geological 262 Palmer Au Co The mete sedimentary domain within the central portion of the the north end of Mamainse Lake. No tonnage figures for the 1976 Batchawana-Pangis Area (Eastern Half), District ol Algoma: ODM - Ontario Department of Mines METASEDIMENTS Envi 263 Palmer py belt is comprised of conglomerates, wacke s, and l ur bid iles, deposit have been reported, although exploration has indicated Ontario Division of Mines. Preliminary Map P-1193. Geologi GSC - Geological Survey of Canada CHEMICAL METASEDIMENTS ronmental indicators suggest a deep-water submarine fan origin. scale 1:15840 or i inch to 1/4 mile. 264 Palmer py that the dimensions of the ore body are estimated to be 600 feet cal Series, P - Preliminary Map 265 Palmer py cp Cu The wacke units are typically intermediate in terms ot comparable in diameter to a minimum depth of 680 feet, with an average 1978a: Ouinn Lake Area (Weslern Half). District of Algoma; Ontario OFR - Open File Report 266 Palmer Cu Ho cp 4a Magnetite-chert ironslone volcanic composition and are interpreted as being derived from grade of 0.19* Cu, C.053% MoS2 and locally, high grades of Ag Geological Survey Preliminary Map P. 1833, Geological Se GR - Geological Report 267 Ryan Cu of the first or second 4c Chert the weathering of earlier volcanic deposits ot up to 2.08 ounces per ton. The porphyries and breccias of the ries, scale 1:15 840 or 1 inch to 1/4 mile MP - Miscellaneous Paper \L©/ tittrmon\ 268 Ryan Cu in the area southeast of Cowie Lake, 4d Chert-pyrite ironstone cycle. Wackes are common Keweenawan have been classified and discussed by Blecha -..Cd r, 269 Palmer Fe overlying the Goulais River Iron Range,-within the mafic metavol (1974). 271 Palmer py in the Cow River area, in the northern part of the Bay 318 McDonell Cu CLASTIC METASEDIMENTS canic sequence 55© metasedimentary sequence north of Grey Owl Lake, and in the Hnrl. Lac. Mekatina lo Spruce Lake area. Commonly associated with the Uranium 319 McDonell Cu :- 3a Undifferentiated wackes in alt of the above-mentioned areas are monolithic and Mnrl. Loc. in Canada at Theano Point on the 3b Ouartz-plagioclase biotite hornblende schist heterolithic conglomerates that represent debris deposits. Con Uranium was first discovered 320 HcDonell Cu eastern shore of Lake Superior. Numerous discoveries of uranium Hnrl. Loc. 3c Wacke , - glomerates are found within the turbidite sequence but are less QUETICO SUB P R OVINCE northwestern part of the map area. x Shoal common. The turbidites are commonly graded and vary in thick have been reported in the A K E 3d Arenite significant exploration work has been performed on the ness from 5 mm to 20 cm. They occur in the Wart Lake area and Although 3e Siltstone, banded siltstone Point discovery (Camray Mines Limited) and the R an son northward into Runnalls Township, they reflect a deep water envi Theano dike in Peever Township (Renwick Uranium Mines Limited), neither 3f Mudstone ronment. have ever been operating mines. 3g Pelite and metamorphic equivalents Shoa The genesis of the uranium concentration is attributed to the SOURCES OF INFORMATION 3h Pebble conglomerate intrusion of diabase dikes within the Chapleau Gneiss Domain 3i Cobble conglomerate Metamorphism where low regional radioactivity IB known to exist. A regional low Base map derived from Map 41 N/2 (Mamainse Point) and Map 41 3n Paraconglomerate grade radioactive anomaly was outlined in the Lo ac h-La r s en K/15 (Pancake Bay) of the National Topographic Series. 3o Graphite Metamorphism in the area can be subdivided into regional Townships area of l he Chapleau Gneiss Domain in the late 1970s. facies throughout the supracrustal se The Chapleau Gneiss Domain has a large number of pegmatitic 3p Pebbly greenschist-amphibolite list of sources of information, see Table 1. quence, and varying degrees of anatexis in the western and rocks associated with it, particularly near the Montreal River reser For a complete 3q Gritty . - ,. eastern part of the supracrustal-plutonic boundary zones. Contact voir. This area is generally higher in radiogenic rocks relative to x 3r Reworked tuff metamorphism associated with the later massive plutons within the Ramsey Gneiss Domain to the southeast. . Magnetic declination approximately 6U5© in 1986. 3s Gneissic the supracrustal rocks is of the hornblende-hornfels rank. The 3t Migmatitic regional metamorphic patterns within the supracrustal sequence 803* Metric Conversion Factor: 1 foot - 0.3048 m . Precious Metals define a zone of amphibolite rank metamorphic rocks near the METAVOLCANICS assemblages in the Si* plutonic rocks, and greenschist facies mineral Gold and silver occurrences within the area appear to be re FELSIC TO INTERMEDIATE METAVOLCANICS rocks further Into the core of the supracrustal belt. The mafic stricted to the central and south-central part of (he supracrustal ^U metavolcanics are typically hornblende -f plagioclase garnet sequence. Traces of gold and silver have been reported from 2a Undifferentiated epidote schists, and contain variable amounts of feldspar or epi some of the interflow sulphide-bearing units within the volcanic dote veintng within zones that have undergone metamorphic seg sequences in the Runnalls Township area and in southeastern 2b Flows regation. The felsic to intermediate metavolcanics are commonly Gapp Township. The most significant gold prospect lo date is that CREDITS - :,: 2c Ash-crystal tuff transformed into fine- to medium-grained quartz * plagioclase * currently held by Massive Energy Corporation, in a zone south of 2d Lapilli-ash-cry sial tuff, lapillistone hornblende garnet schists. muscovite Spruce Lake in Davieaux Township. Two occurrences containing Geology by E.C. Grunsky and assistants, 1981 to 1984. Compila 2e Tuff breccia Most of the metasediment are volcanically derived and the significant gold values have been located along a sulphide facies tion by E.C. Grunsky, 1981 to 1986. 2i Gneissic , -- chemistry is similar to the metavolcanics. Thus, their metamorphic ironstone (Massive Energy Corporation) The gold is concentrated r :-^: -- ©?": assemblages are typically those associated with the volcanic along shears within the sulphide zones and exploration at this Every possible effort has been made to ensure the accuracy of MAFIC TO INTERMEDIATE METAVOLCANICS rocks, i.e., hornblende + plagioclase biotite quartz mus time has outlined patchy mineralization. The area is also inter schists are present in the Grey \ Ihe information presented on ihis map: however, the Ontario Min covite garnet. Staurolite-bearing sected by some large east-trending faults that are possibly related and Mines does not assume any Owl Lake and the central metasedimentary basin in the Wart Lake * istry of Northern Development 1 Undiflerentiated to the development of the second cycle of volcanism and the verify critical area. Typical greenschist assemblages for the mafic metavol liability for errors thai may occur. Users may wish to la Fine-grained flows sedimentary basin to the north in Tronsen and Vibert Townships. information; sources include both the references lisied here, and canics are plagioclase epidote sericite chlorite and flows Gold mineralization may be concentrated along this large fault U\ P E R O R information on file at the Resident Geologist©s Office and the 1b Medium to coarse-grained plagioclase actinolite epidote chlorite. Textures are usually system trending east-west from Gapp Township to Olsen Town i 1c Pillowed flows preserved in the lower rank metamorphic rocks. The greenschist Mining Recorder©s Office nearest the map area. ship. Associated with this fault system is extensive carbonatiza © © © v -^4^ 4© 1?"":"©";, "- 1d Massive flows mineral assemblages for the felsic meta^canics are typically of Massive A tion. The carbonate alteration, and the gold discoveries \ Issued 1987 -. ; . © V ?.:^; . ;v - - le Lapilli-ash-crystal tuff " . quartz * plagioclase + sericite actinolite (hornblende) -*- Energy Corporation, are situated in proximity to this system. i zoisite. The ferromagnesianTntneral content varies with compaei- Y -- ," - X^jl©^v.Ut:-".- i^ " 1f Lapilli tuff-tufl breccia - lion Metasediments display a wide range of metamorphic mineral Information from this publication map be quoted if credit Is given. 1h Gneiss Figure 1: Litho-tectonic subdivisions of part of the Superior Province (from Card 1979) \ assemblages in the greenschist facies, notably quartz * Is is recommended thai reference to this map be made in the 1i Amphibolite plagioclase biotite chlorite sericite epidote in the wackes, Swayze Volcanic Domain Volcanic Domain WRPD White River Plutonic Domain following form: - -y .1 B^? * T . Acknowledgments ;;; ^ .^, ;; ASVD Abitibi BeVD Benny 1J Migmatitic quartz * feldspar biotite chlorite epidote sericite in the PGD Peterlong Gneiss Domain AgGD Algoma Gneiss Domain SVD Schreiber Volcanic Domain siltstone and chlorite + biotite -f feldspar * quartz sericite in The author was ably assisted during the field work by Mr. R. Reid taA RGD Ramsey Gneiss Domain LGD Levack Gneiss Domain MGD Manitouwadge Gneiss Domain the argil l iles and Mr. G. Macmaster. Integration of field data with laboratory, Grunsky, EC. : © © ~"© ~©" SA Shawmere Anorthosite Complex MVD Manitouwadge Volcanic Domain Notes: Zones of anatexis and assimilation of the supracrustal rocks assessment, and report data was provided by Mr R. Reid, Ms. S. BVD Biscotasing Volcanic Domain ; © : 1987: Precambrian Geology of the Batchawana Synoptic Project in the northern and western part of the belt In Rice, and Ms. J. Howe. Their assisstance is gratefully acknowl BaVD Batchewana Volcanic Domain CGD Chapleau Gneiss Domain SaVD Saganash Volcanic Domain \ Area, Mamainse Point-Pancake Bay Sheet, District of Al "These rocks are of varying ages: from late Archean lo Post are most common ( the Tronsen-Tolmonen-Raaflaub-Home Townships area, the rrveta- edged. AgPD Algoma Plutonic Domain AGD Anjigami Gneiss Domain CPD Caramat Paragneiss Domain goma; Ontario Geological Survey, Map P.3062, Geological Huronian 4fe*50'l on each map. WVD Wawa Volcanic Domain 46 50© Series-Preliminary Map, scale©1:50 000. Geology 1981-1984. All units may not be present J 8600 84 30