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CAMPBELL CHIBOUGAMAU MINES LIMITED
CHIBOUGAMAU EXPLORATION JOINT VENTURE
EXPLORATION POTENTIAL
OF THE
SOUTH CHIBOUGAMAU VOLCANO—SEDIMENTARY BELT
Chibougamau, Que. W. Hamilton, May, 1977. Geologist.
GM 69641t Ressources naturelles ot Faune
Dir information géologique TABLE OF CONTENTS
PAGE
I) SUMMARY 1 II) INTRODUCTION 1 III) EXPLORATION HISTORY 2 IV) GENERAL GEOLOGY OF THE SOUTH CHIBOUGAMAU VOLCANO-SEDIMENTARY BELT 2 V) MINERALIZATION 5 VI) EXPLORATION POTENTIAL 6 VII) PRINCIPAL TARGET AREAS 8 VIII) CONCLUSIONS AND RECOMMENDATIONS 10 IX) REFERENCES 11
APPENDICES
APPENDIX I COMPARATIVE STRATIGRAPHIC COLUMNS APPENDIX II - DESCRIPTION OF POTENTIAL TARGET AREAS AND DIAMOND DRILL HOLE SUMMARY.
MAPS
MAP 1 C.E.J.V. GENERAL PROGRAM, PROGRESS MAP 1" = 4 mi. GE-67 LEMOINE AND RINFRET TOWNSHIPS 1" = 1 mi. GE-69 QUEYLUS AND DOLLIER TOWNSHIPS 1" = z mi. GE-68 BRONGNIART AND HAUY TOWNSHIPS 1" = Z mi. GE-66 SCOTT AND OBALSKI TOWNSHIPS 1" _ 1 mi. GE-74 DAUBREE AND LEVY TOWNSHIPS 1" = 1 mi. I - SUMMARY The south Chibougamau volcano-sedimentary belt represents part of the Chibougamau Exploration Joint Venture's General Pro- gram. The present study involves a general compilation and evalua- tion of available data on the south Chibougamau volcano-sedimentary belt. The location of the area studied is shown on map 1.
The section of the volcano-sedimentary belt studied is 80 km. long, covering 9 townships and encompasses the southern part of the Joint Venture area. There are presently 2 operating mines within this area; the volcanogenic type Lemoine Mine (zinc-copper) and the vein-type Opemisca Mine (copper-gold). As well there are 3 known volcanogenic deposits located within the area; two of which are potential producers (Selco's Scott zinc-copper deposit and Opemisca's zinc-copper deposit). A third potential producer is Rio Tinto Canadian Exploration Limited's recently discovered vein-type (copper) deposit in Obalski township.
The present exploration potential of the majority of the south Chibougamau volcano-sedimentary belt is low. Most of the favourable ground has been either started or explored by many companies. As well the speculative nature of the interpreted presence of the Waconichi Formation (Lemoine Mine host) in Rinfret, Brongniart, Hauy and Levy townships does little to enhance the potential of the area. However, 5 principal exploration target areas, ranging in exploration potential from moderate to high, have been identified for reconnaissance geological prospecting or geophysical follow-up. These areas, in order of priority, are listed below: ❑ Brongniart township, Area 1 L?;Queylus township, Area 1 O Queylus township, Area 2 O Rinfret-Vimont townships, Area 3 ODollier township, Area 2
II - INTRODUCTION During the period of February to April 1977 a regional compilation of the south Chibougamau volcano-sedimentary belt was undertaken. The compilation was intended to define the stratigraphy of the volcano-sedimentary belt as well as to outline any geologically and/or geophysically favourable target areas within this belt. The area studied comprised the volcano- sedimentary band extending from Rinfret to Levy townships (see map 1). With regard to the compilationoof geophysical and diamond drilling data, only those areas which were not staked as of April 25th, 1977 have been considered. It is intended r NUMÉRIQUE
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Non-standard size page(s) scanned and placed after these standard pages that this facet of the compilation should be a continuing pro- cess; that is, up-dated every one or two months as more ground becomes open.
Five principal exploration target areas are described in this report. Areas which require the acquisition of additional assessment data in order to better evaluate their potential or exhibit a low exploration potential and a Diamond Drill Hole Summary are referred to in Appendix II.
III - EXPLORATION HISTORY Exploration has been carried out spordically in this region since the early 1950's with fairly intensive programs being launched in 1960 (Campbell), 1969 (Hudson Bay Explora- tion and Development Co. Ltd.) and 1970 (Patino); however, it was after the discovery of the volcanogenic massive sulphide Lemoine orebody that the region assumed major importance.
In 1972 the Quebec Department of Natural Resources (Q.D.N.R.) released an INPUT survey which included the east- ern section of this belt. This precipitated a staking rush with the result that considerable exploration was undertaken in the area. The Lemoine discovery was a direct result of follow-up work done on one of the INPUT anomalies and it pre- cipitated a second staking rush. After the dust had settled, vast portions of the eastern section of this volcano-sedimentary belt had been staked. The recent work done by Q.D.N.R. geologists and various companies in this region resulted in a great accumula- tion of data, but so far has done very little to aid our under- standing of the geology.
IV - GENERAL GEOLOGY OF THE SOUTH -CHIBOUGAMAU VOLCANO-SEDIMENTARY BELT The volcano-sedimentary sequence lies at the eastern extremity of the Matagami-Chibougamau Greenstone Belt in the Superior Structural Province of the Canadian Shield. Norman (1941) divided the volcano-sedimentary sequence into the Pre- Opemisca Group (volcanic rocks) and the Opemisca Series (a post- volcanic sedimentary sequence). This stratigraphic division under- went little change until 1970, when Duquette, basing his interpre- tation primarily on the stratigraphic succession on the north limb of the Chibougamau anticline named the volcano-sedimentary sequence the Roy Group. He divided the group into three formations which are, from bottom to top, the Waconichi, Gilman and Blondeau. Re- cent mapping by Cimon (1976, 1976a, 1977) enabled him to identify a post-volcanic, sedimentary sequence which he labelled the Stella Formation. As well Cimon reinstated the Opemisca Group and con- siderably altered the stratigraphy of the Roy Group. 3
Three synvolcanic, ultramafic to mafic sills intrude the volcanic sequence in its upper levels (ie; within the Blondeau Formation). The Doré Lake Complex and the Chibougamau Pluton represent post-volcanic igneous complexes. Cimon and Gobeil (1976) state, " we established that the Stella Formation lies unconformably over the older rocks and contains detrital elements derived from both .the Doré Lake Complex and the Chib- ougamau Pluton".
Structurally the rocks have been tightly folded along east- west axes and then gently refolded along north-south axes during the Kenoran Orogeny. In general the synvolcanic sills and post- volcanic igneous complexes occupy the cores of regional anti- clines, whereas the volcano-sedimentary rocks lie in the cores of regional synclines. It should be noted that recent mapping by Cimon (1976a, 1977) in eastern Queylus township indicates that the volcanic sequence is a north-facing homoclinal sequence unconformally overlain by the Opemisca Group sedimentary rocks which occupy the core of the Chapais Syncline. Although it appears that Cimon has established fairly good stratigraphic Control, prev- ous mapping by Q.D.N.R. geologists (Holmes, 1959; Imbault, 1959; Neale, 1959) and by Baker (1974 - unpublished) have shown the volcanic belt to be folded along east-west axes.
Numerous NE and NNE striking faults pass through the region. They are probably related to the regional Grenville Front located in the eastern extremity of the area in that they may have been formed and/or reactivated during the Grenville Orogeny.
With the exception of late phase diabase dykes and the unconformably overlying Proterozoic Chibougamau Series sedimen- tary rocks all other rocks have undergone greenschist facies metamorphism.
There are two basic problems associated with the south Chibougamau volcano-sedimentary belt. The first is its un- certain correlation with the volcanic sequence on the northern limb of the Chibougamau anticline. The second problem involves the placing of the Lemoine Mine within the stratigraphic sequence. As stated by Allard (1976), "The debate between Cimon and myself is more than an academic dispute on stratigraphic placement, a commonplace argument within the geological profession, since the efforts of companies should be directed at two completely different units depending on which version is right". It should be noted that there is complete agreement between Allard and Cimon re- garding the existence of the post-volcanic Stella Formation. The discord arises over petrology and stratigraphic interpreta- tion. Although Allard's interpretation, with some local modifi- cation was used as the basis for this compilation, it should be emphasized that attempts were made to define geological environ- ments favourable for the deposition of volcanogenic massive sulphides similar to the Lémoine Mine regardless of the strati- graphic terminology applied to the rocks.
The simplified stratigraphy of the south Chibougamau volcano-sedimentary belt is as follows: FORMATION LITHOLOGY Stella Basal conglomerate, sandstone and shale. Blondeau Rhyolite, pyroclastics and interbedded graphitic argillite. Intruded by ultra- mafic to mafic sills. Gilman Andesite, basalt and minor felsic pyroclastics. Gabbro. Waconichi Quartz-feldspar porphyry (porphyritic soda rhyolite), feldspathic tuff and felsic lavas, minor mafic lavas.
According to Allard (1976) the Waconichi. Formation out- crops immediately southeast of the Doré Lake Complex in Lemoine and Rinfret townships. Allard's proposed stratigraphic place- ment of the Lemoine Mine is within this belt of felsic volcanic rocks slightly below the Waconichi-Gilman contact and specifi- cally at the contact between a rhyolite and a felsic crystal tuff. Allard also recognized a rhyolite dome in Scott township, immediately north of and adjacent to rocks of the Chibougamau Pluton. He believes that this horizon is correlative with the Waconichi Formation on the southeastern side of the intrusive complexes. In 1976, while following-up an airborne INPUT survey, Selco Mining Corp. discovered interesting pyrite-sphalterite- chalcopyrite mineralization associated with this rhyolite dome. Iain Downie of Selco considers this discovery to be the approxi- mate time equivalent of the Lemoine Mine. The stratiform dis- covery lies at the contact between the Chibougamau Pluton and a quartz-feldspar porphyry (porphyritic rhyolite) immediately below the Lac Sauvage Iron Formation.
An interesting belt of felsic to intermediate pyroclastic rocks with minor rhyolite and andesite lavas was traced by Holmes (1959) across Brongniart and Hauy townships. It occupies the core of an east-west trending anticline and is flanked to the north and south by thick sequences of intermediate to mafic lavas. Unfortunately the structure and stratigraphy are not clearly defined in this area; however, this felsic zone probably represents the Waconichi Formation. (It is also possible that this zone could represent the felsic phase of the upper Gilman Formation; however, the thickness of the volcanic belt in this region argues against this hypothesis. In any case this zone represents a significant felsic marker "horizon".)
A small wedge of rhyolite and agglomerate outcropping in southwestern Levy township is also interpreted to represent the Waconichi Formation.
The Gilman Formation underlies the majority of the area studied. For the most part it has not been mapped in detail and thus the geology is highly simplified and somewhat ambigu- ous. The Gilman Formation is principally composed of mafic to intermediate lavas and minor felsic to intermediate pyroclastic rocks. Numerous gabbro sills intrude the volcanic rocks.
The Blondeau Formation is presently the object of much controversy. Allard (1976) considers it to conformably over- lie the Gilman Formation and to represent the uppermost forma- tion of the Roy Group. The Blondeau Formation is comprised of rhyolite, felsic to intermediate pyroclastic rocks and inter- bedded graphitic argillite. It underlies only a small portion of the region. It outcrops in central Levy township where it is intruded by the Roberge (peridotite-pyroxenite), Ventures (pyroxenite-gabbro) and Bourbeau (gabbro) Sills. Allard (1976) has tentatively proposed its existence as an upthrown remnant in southeastern Lemoine and southwestern Rinfret townships.
The Stella Formation forms a band extending through the northern to central section of the belt. It is comprised of conglomerate, sandstone and shale and is characterized by linear zones of airborne E.M. anomalies corresponding to graphitic horizons with or without minor concentrations of pyrite and pyrrhotite.
V - MINERALIZATION Mineralized showings are widespread throughout the south Chibougamau volcano-sedimentary belt. Three major types of sulphide mineral deposition are present within the region. 1) Volcanogenic Environment This type is characterized by massive to disseminated pyrite- pyrrhotite-sphalerite-chalcopyrite mineralization enclosed within or closely associated with volcanic rocks. Two subdivisions of this type have been recognized in the volcanic-sedimentary sequence.
a) "Proximal Type" - Massive sphalerite-chalcopyrite-pyrite mineralization is associated with quartz-feldspar porphyry porphyritic rhyolite) and felsic pyrocalstic rocks; that is, spatially associated with a rhyolite dome. Examples are the Lemoine Mine and the Selco Scott Lake discovery. b) "Distal Type" - Disseminated and banded pyrite-pyrrhotite- minor chalcopyrite-sphalerite mineralization is associated with felsic pyroclastic rocks and interbedded graphitic argillite. Much of the diamond drilling following up the Q.D.N.R. INPUT survey intersected this type of mineraliza- tion.
2) Epigenetic Environment a) "Shear Zone Type" - Disseminated pyrite-gold mineraliza- tion is associated with northeast trending quartz-bearing shear zones. An example is the gold bearing shear zone located on the northern shore of Lac à l'Eau Jaune in Hauy township. b) "Muscocho Lake Type" - Lenses of massive and disseminated pyrrhotite-chalcopyrite-pentlandite are associated with a silicified volcanic breccia in contact with a gabbro sill and in close proximity to a granodiorité plug.
3) Intrusive Environment • Minor concentrations of chalcopyrite are associated with magnetite, tourmaline, quartz and carbonate veinlets in a fracture stockwork in tonalitic rocks. An example occurs in north-central Queylus township.
VI - EXPLORATION POTENTIAL
The exploration potential of the majority of the south Chib- ougamau volcano-sedimentary belt is low at present. Since 1973 many companies have carried out intensive exploration programs in this region; however, with the exception of the Lemoine Mine (1973) and the Selco Scott Lake discovery (1976) very little encouragement, 7
has been forthcoming. At present large blocks of claims are being held in Dollier, Lemoine and Rinfret townships and those anoma- lies occurring on open ground have generally been adequately tested. In the western section of the belt many claims have re- cently been allowed to lapse; however, airborne.E.M. data is not available and the quality of the follow-up and diamond drilling programs initiated by various companies bodes ill for worthwhile exploration in this region. As previously mentioned, a continuing evaluation of individual anomalies on claims which have been allowed to expire is probably the best method of target identification.
Concerning the exploration potential of the various formation of the south Chibougamau volcano-sedimentary belt, the order of importance, ranging from high to very low, is as follows: 1) Waconichi; 2) Blondeau; 3) Gilman; and 4) Stella. The upper level of the Waconichi Formation is considered to be most favour- able environment for volcanogenic massive sulphide deposits (witness Lemoine Mine and the Selco Scott Lake discovery). Allard (1976) recommends exploring "At the Waconichi-Gilman contact (in- cluding the Lac Sauvage Iron Formation), especially in the vicinity of porphyritic rhyolite domes, for stratiform volcanogenic massive sulphide (copper-zinc) deposits" as well as "In the rocks older than the upper part of the Waconichi for feeder veins and stockwork type deposits (copper and gold)". Factors reducing the present explora- tion potential of the Waconichi Formation are the relative lack of open ground (no part of the areas in Lemoine or Scott townships underlain by the Waconichi Formation are presently open) and the speculative nature of the interpreted presence of the Waconichi Formation within Rinfret, Brongniart, Hauy, Levy and Daubrée townships.
The Blondeau Formation also represents a favourable geological environment. As stated by Allard (1976) exploration should be under- taken "In the Blondeau Formation, close to rhyolite domes, agglomer- ate lenses and cherty sulphide-bearing beds for stratiform volcano- genic massive sulphide (copper-zinc) deposits". At present very little ground underlain by the Blondeau Formation is open.
The exploration potential of the Gilman Formation is moderate to poor. The determining factors are the presence of numerous. sulphide showings generally associated with felsic volcanic horizons within the Gilman Formation and the relatively large unstaked areas underlain by these"rocks. However, the numerous airborne surveys conducted over the region and the fact that most of the follow-up programs involved diamond drilling do not enhance the exploration potential of the Gilman Formation. The exploration potential of the Stella Formation is low to very low. The numerous airborne E.M. surveys have so far only delineated a great preponderance of linear graphitic conductors with minor pyrrhotite-pyrite in Dollier and Lemoine townships. As well, the identification of any volcanic rocks intercalated with the sedimentary sequence is strictly subjective insofar as it is dependent on the theories proposed by the different geologists.
VII - PRINCIPAL TARGET AREAS 1) Brongniart Township, Area 1. The eastern half of Brongniart township was covered by the Hudson Bay Exploration and Development Co. Ltd. A.E.M. survey in 1969. As such, the western half of the township represents the only part of the south Chibougamau belt which has not undergone airborne coverage or extensive ground ex- ploration. It would appear to be one of the best target areas in this region with a high exploration potential. The area with the best potential within this region is the belt of felsic volcanic rocks (unit 1) which underlies the west-central section of the township (Area 1). This is the western extension of the felsic unit described in Hauy township. Numerous conductive horizons were outlined in this felsic volcanic unit, south of the Obatagamau River by Hudson Bay Exploration in 1972-73, and these were tested by a total of 12 diamond drill holes. At pre- sent the logs of only three of these drill holes (B-6 and 7, C-2) are available and the conductors in all three cases were explained by sections of pyrite-bearing graphitic schist. Three intersections returned low Cu-Zn values. A 5 ft. section in drill hole B-6 (163.5'-168.5') assayed 0.25% Cu and 0.6% Zn. A. second 5 ft. section from 182'-187' assayed 0.25% Cu and 0.4% Zn. .A 5 ft. section in diamond drill hole C-2 assayed 0.1% Cu and 0.1% Zn from 120'-125'. As well seven diamond drill holes were sunk by New Consolidated Canadian Exploration Limited in 1958 in the northwestern section of the area adjacent to the Lac Presqu'ile granitic pluton. Generally felsic to intermediate volcanic rocks were intersected and conductors were explained by slightly graphi- tic, silicified, sulphide-bearing shear zones in rhyolitic rocks. Assays are available for only two holes of which the best inter- sections are as follows: drill hole N-1, 0.1% Cu, 0.034% Zn, 0.005 oz. Au/3' from 218'-221'; drill hole N-2, 0.07% Cu, 0.46% Zn, Tr.Au/12' from 145'-157' and 0.17% Cu, 1.02% Zn, Tr.Au/l' from 172'-173'. As well an 8.5' section of graphitic sediment in drill hole N-5 was estimated visually to contain 0.25% Cu and 2% Zn from 267.5'-276'. Unfortunately lack of outcrop between the Hudson Bay Exploration and the New Consolidated Canadian Exploration drill holes makes the geological interpretation somewhat speculative. As well, the presence of graphitic conductors does not enhance the potential of this area; however, coincidence of a favourable geological environment, known sulphide mineralization to the northwest and east and a relative lack of intensive exploration make this an interesting area. It is recommended that some reconnaissance prospecting be undertaken in this area to attempt to gain a better knowledge of the geology and that at least the northern section of this area be staked.
2) Queylus Township, Area 1. Area 1 lies in southern Queylus township approximately 12 miles east of the township center line. It is characterized by a weak (3-channel) INPUT anomaly. According to the Q.D.N.R. INPUT survey map (B-1129-1; GM-27841) the anomaly lies on the contact between a chlorite-rich tuff and agglomerate unit and andesite. A well cut grid at 400 ft. spacing exists in this area and there are no indications of diamond drilling. A few days prospecting and pin-pointing the anomaly with an E.M.-16 would enable a better evaluation of this anomaly whereupon a staking decision could be made.
3) Queylus Township, Area 2. Area 2 lies in the southeastern corner of Queylus township and is also chacterized by a weak (3-channel) INPUT anomaly. A grid exists in this area and it is recommended that prospecting and an E.M.-16 survey be undertaken to evaluate the potential of the conductor. A staking decision could await the results of this work. -
4) Rinfret-Vimont Townships, Area 3. Area 3 characterized by a 3-channel INPUT anomaly occurring on the Boisvert River in Vimont township approximately 2 mile south of the Rinfret-Vimont township boundary. As the pos- sibility exists that the anomaly is not valid bedrock conductor, consideration should be given to allowing John Betz to pronounce final judgement on its merits.
5) Dollier Township, Area 2 Area 2 occurs in west-central township and it is character- ized by a single 5 mho DIGHEM conductor. The conductor is isolated, weak, does not have any magnetic response and possibly corresponds - 10 -
to a small swampy lake in the vicinity; however, DIGHEM has not indicated that this is a surface response. As the original DIGHEM data are not available a day could be spent attempting to pin-point the anomaly with respect to topography with an E.M.-16 survey. The exploration potential is considered to be moderate.
VIII - CONCLUSIONS AND RECOMMENDATIONS The present exploration potential of the majority of the south Chibougamau volcano-sedimentary belt is low. The correla- tion of the south Chibougamau belt with the volcanic sequence on the northern limb of the Chibougamau anticline is uncertain. The placement of 'the Lemoine Mine within the stratigraphic succession of the south belt is presently the object of much controversy; however, its placement at the top of the Waconichi Formation appears valid. The ground exploration following-up the various A.E.M. surveys since 1969 has generally been of a high caliber, and most geophysical anomalies have been adequately tested. It is intended that this compilation should be a continuing process in order to evaluate the potential of any anomalies occurring on claims which are allowed to expire in the future.
The exploration potential ranging from high to low, of the formation of the south Chibougamau belt is as follows: 1) Waconichi Formation 2) Blondeau Formation 3) Gilman Formation 4) Stella Formation
The majority of the areas described within Appendix II either require the acquisition of further assessment data in order to better evaluate their potential or exhibit a low ex- ploration potential. However, 5 principal target areas have been identified for reconnaissance geological or geophysical follow-up. These areas, in order of priority are listed below: Brongniart Township, Area 1 Queylus Township, Area 1 Queylus Township, Area 2 Rinfret-Vimont Townships, Area 3 Dollier Township, Area 3
W, h . Chibougamau, Que. W. Hamilton, May, 1977. Geologist. 11 -
IX - REFERENCES
Allard, G.O. (1967) Geology of Northwest Quarter of Rinfret Township, Abitibi-East and Roberval Counties; Q.D.N.R., P.R. No. 567. Allard, G.O. (1975) Geology of Northeast Quarter of Scott Township; Q.D.N.R., P.R.-609. Allard, G.O. (1976) Doré Lake Complex and Its Importance to Chibougamau Geology and Metallogeny; Q.D.N.R., D.P.-368. Allard, G.O. and Caty, J.L. (1969) Geology of the Northeast Quarter and part of the Southeast Quarter of Lemoine Township, Abitibi-East and Roberval Counties; Q.D.N.R., P.R.-566. Archibald, G.M. (1960) Preliminary Report on the Southwest Quarter of Levy Township, Electoral District of Abitibi- East; Q.D.N.R., P.R.-419. Blecha, M. (1960) Report of Geological Reconnaissance Work of the Area East of Lake Chibougamau; C.C.M. files. Christmann, P. (1974) Rapport Préliminaire sur la Motié Sud du Canton de Scott, Comté d'Abitibi-Est; Q.D.N.R. D.P.-217. Christmann, P. (1975) Rapport Géologique sur la Motié sud du Canton de Scott, Comté d'Abitibi-Est; Q.D.N.R., D.P.-319. Choinière, J. (1977) Géochimie des Sédiments de Ruisseau Partie Nord du Canton de Scott, Q.D.N.R., DPV-451. Cimon, J. (1976) Queylus (NW) and Hauy (NE) Townships; Q.D.N.R., P.R.-613. Cimon, J. (1976a) Géologie du Canton de Queylus (NE), Abitibi- , Est; Q.D.N.R., DPV-439. Cimon, J. (1977) Quart Sud-est du Canton de Queylus, Q.D.N.R., DPV-448. Cimon, J. and Gobeil, A. (1976) The Stella Formation: Its Implication for the Genesis and the Relative Age of the Mineralization in the Chibougamau Mining Camp. (Paper presented at the 78th Annual General Meeting of the Canadian Institute of Mining and Metallurgy, April, 1976.) DeMontigny, P.A. (1960) Preliminary Report on the Southwest and part of the Southeast Quarter of Lemoine Township, Abitibi-East Electoral District; Q.D.N.R., P.R.-437. Duquette, G. (1970) Archean Stratigraphy and Ore Relationships in the Chibougamau District; Q.D.N.R., Special Paper 8. Duquette, G. (1976) North half of McKenzie and Roy Townships and Northwest Quarter of McCorkill Township; Q.D.N.R., DP-357(V). - 12 -
Feurbach, M., Clark, T. and Moravek, P. (1970) Report and Geological Map of the North-West Quarter Scott Township, Abitibi Chibougamau District; Q.D.N.R., D.P.-32. Holmes, S.W. (1959) Fancamp-Hauy Area, Abitibi-East Electoral District, Que. Dept. of Mines, G.R.-84. Imbault, P.E. (1959) Queylus Area, Abitibi-East and Roberval Electoral Districts; Que. Dept. of Mines, G.R.-83. Kindle, E.D. (1942) Brock River Map Area, Abitibi and Mistassini Territories, Quebec (Summary Report); Can. Dept. of Mines and Resources, Geological Survey Paper 42-4. Krause, C.A. (1961) Summary Report and Project Reports East Side Lake Chibougamau; (C.C.M. Files) Lavoie, J.S. (1972) Geology of Opemiska Mines. (C.C.M. Files) Lyall, H.B. (1959) Brongniart-Lescure Area, Electoral District of Abitibi-East; Québec Dept. of Mines, G.R.-85. Mawdsley, J.B. and Norman, G.W.H. (1935) Chibougamau Lake Map- Area, Quebec; Can. Dept. of Mines, Mem. 185. Neale, E.R.W. (1959) Dollier-Charron Area, Abitibi-East and Roberval Electoral Districts; Quebec Dept. of Mines, G.R.-82. Norman, G.W.H. (1936) Opemisca-Chibougamau Map-Area, Northern Quebec; Can. Dept. of Mines, Paper 36-6. Oliveira, J.A.L. (1973) The Petrology of the Chibougamau Green- stone Belt Volcanics; Unpublished M.Sc. Thesis,' University of Georgia. Wolhuter, L.E. (1960) Preliminary Report on the Southeast Quarter of Levy Township, Abitibi-East Electoral District; Quebec Dept. of Mines, P.R.-434. Wolhuter, L.E. (1970) Geology of thb Northwest Quarter of Levy Township, Abitibi-East Electoral District; Q.D.N.R., P.R.-595. APPENDICES