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Map 2171 Moosonee Sheet Geological Compilation Series

ONTARIO DEPARTMENT OF MINES HON. ALLAN F. LAWRENCE, Minister of Mines D. P. Douglass, Deputy Minister J. E. Thomson, Director, Geological Branch

Scale, l inch to 200 miles

H.T.S. reference 421,42P, 321, 32M

LEGEND

MINERAL RESOURCES CENOZOIC Puskwuche Point Drill Hole The map area contains deposits of lignite, fireciay, gypsum, and niobium (columbium). PLEISTOCENE AND RECENT* The early mineral exploration in the area was for its industrial Till, clay, sand, gravel, peat. mineral and fuel resources in the Paleozoic and Mesozoic sedi © Kenogami River Fm, Middle Member f Upper Silurian 756©-930 © Kenoqami River Fm. Lower Member ) mentary rocks. In 1964 the publication ot aeromagnetic maps by 930©-1116© Ekwan River Formation the Ontario Department of Mines and Geological Survey of Canada 1116©-1258© Severn River Formation MESOZOIC licenses 1253©-1529© Bad Cache Rapids-Churchill attracted considerable attention to the area. Si x exploratory River Groups: undivided were issued by the Ontario Department of Mines to companies 1529M536© Diabase LOWER CRETACEOUS interested in the investigation of the Fraserdale-James Bay anomaly. A further license has been granted for lignite exploration in the MATTAGAMI FORMATION Onakawana area to the Alberta Coal Limited. No mines have been brought into production in the area. 14 Kaolinitic quartz sand, fireclay, clay, Consolidated Morrison Explorations Limited has discovered lignite. within their exploratory license area (lying within the granulite zone between latitudes 50©35©N and 50054©N) a carbonatite body UNCONFORMITY that contains disseminated pyrochlore. The company reports that PALEOZOIC extensive drilling (23,000 feet within the license area) has outlined Bie Piskwamsh Point a deposit containing a minimum of 80,000 tons per vertical foot DEVONIAN that grades in excess of G.52% niobium (columbium) pentoxide. UPPER DEVONIAN The known strike length of the body is 2200 feet with widths up to LONG RAPIDS FORMATION 200 feet reported. Lignite occurring near the surface at Onakawana was the object of an extensive drilling program by the Ontario Department of 13 Dark brown and black carbonaceous Mines during the years 1927-33 and the T. A N. O. Railway in the shale; some clay ironstone nodules. period 1939-41. About 300 holes were drilled in Dyer and Morrow townships and several shafts were put down. In 1945-6 a pilot plant MIDDLE DEVONIAN was operated at Onakawana to produce a beneficiated lignite fuel, WILLIAMS ISLAND FORMATION using raw lignite obtained from an open pit on the west bank of the Abitibi River. The drilling indicated two lignite seams separated 12d Limestone,grey and red shale; some and overlain by fireclay. A total of 10 million tons of raw lignite gypsum and dolomite. were proven by extensive drilling in two areas,-The raw lignite con sists of a mixture of woody, peaty, and earthy varieties, the whole MURRAY ISLAND FORMATION moisture and 5 percent ash, with a heat averaging 50 percent 12c Brown, fossiliferous limestone, value of 5,000 B. T. U. per pound. The associated dark-coloured brecciated limestone. fireclays have possible value for low to medium-duty refractories. Very large reserves of gypsum are present. Massive, white, MOOSE RIVER FORMATION gypsum of Middle Devonian age outcrops at intervals over a dis tance of 40 miles along the northwesterly-trending Moose River 12b Limestone and dolomite breccia, arch. The main areas, from northwest to southeast, are on the gypsum. Cheepash River, at Moose River Crossing, Gypsum Mountain, and on the French River. Drilling on the Cheepash River in 1963 by the KWATABOAHEGAN FORMATION Moosonee Gypsum Company proved the continuation of the 12a Brown bituminous lossiliferous gypsum to a depth of 125 feet. At Moose River Crossing in 1929 the limestone; minor chert. James Bay Basin Oil Company Limited drilled three holes. One of these, on Murray Island, intersected 96 feet of gypsum. At Gypsum Mountain, banks of gypsum, 15 to 20feet high, are exposed LOWER DEVONIAN above the muskeg in an area of 3-4 square miles. STOOPING RIVER FORMATION Much ot the limestone of the Murray Island Formation is of a high calcium variety, suitable for the production of chemical lime. 11 b Sparsely fossiliferous grey arenace For more detailed information see G. Bennett et al. Operation ous limestone, cherty limestone. Kapuskasing, Ontario Department of Mines, Miscellaneous Paper 10, 1967, and A. W. Norris, B. V. Sanford, and H. H. Bostock, Geo SEXTANT FORMATION6 logy Hudson Bay Lowlands, Manitoba, Ontario, Quebec and District of Keewatin; Geological Survey of Canada, Paper 67-60, accom 11a Arkose, conglomerate, sandstone, panied by Map 17-1967. siltstone and shale with plant remains.

EROSIONAL INTERVAL SILURIAN UPPER SILURIAN KENOGAMI RIVER FORMATION UPPER MEMBER

10c Light grey and cream limestone and dolomite.

KENOGAMI RIVER FORMATION MIDDLE MEMBER 10b Red siltstone, shale, mudstone, and HOW TO OBTAIN ADDITIONAL INFORMATION sandstone; some interbedded lime stone. geological maps covering this sheet are indicated on Published KENOGAMI RIVER FORMATION Maps 2079, 2080, and 2081, Ontario Department of Mines, Index LOWER MEMBER Toronto, and on Index Sheet 42, Geological Survey of Canada, Department of Energy, Mines and Resources, Ottawa. Wa Yellowish orange dolomite. Two uncoloured preliminary maps covering the south part of this sheet may be obtained from the Publications Office, Ontario MIDDLE SILURIAN Department of Mines, Toronto. These are at the scale of one inch EKWAN RIVER FORMATION equals two miles and are named as follows: P. 375 Onakawana; P. 376 Partridge River. 9 Brown and tan fossiliferous lime Published geological reports covering this sheet are listed in stone and dolomite; biostromal in Bulletin No. 25, Ontario Department of Mines, and in the Indexes part. of Publications, Geological Survey of Canada. UNCONFORMITY Topographic maps of t he area may be obtained from the Ontario Department of Lands and Forests or the Topographic Survey, PRECAMBRIAN Department of Energy, Mines and Resources, Ottawa. Aeromagnetic maps covering this sheet may be obtained from ARCHEAN AND PROTEROZOIC the Director, Geological Survey of Canada, Ottawa, or Publications DIABASE* Office, Ontario Department of Mines, Parliament Buildings, Toronto 2. Air photographs may be obtained from Silviculture Section, 8 Diabase (dikes). Ontario Department of Lands and Forests, Downsview, Ontario, or from the National Air Photographic Library, Department of Energy, Mines and Resources, Ottawa. Information on mineral occurrences may be obtained at the office of the local Resident Geologist (Timmins), Mining claim maps and general information for prospectors may CARBONATITE COMPLEXES be obtained at the offices of the local Mining Recorders (Timmins, Kirkland Lake), or at the Ontario Department of Mines, Toronto. Up to date information on current developments of the minerals industry may be obtained from the annual review of the Ontario Department of Mines, published in the early months of each year.

KAPUSKASING GRANULITE COMPLEX*/ 6a AmphibQle-pyroxene-quartz-feld- spar granulite, 6b Garnet-amphibole-pyroxene- quartz-feldspar granulite. 6c Amphibo/e-pyroxene granulite. FAULT CONTACT FELSIC INTRUSIVE ROCKS 5 Undifferentiated. 5a Massive granitic rocks. THE MAP INDEX 5b Foliated granitic rocks. INTRUSIVE CONTACT The red letters and numbers in the borders provide a location ULTRAMAFIC INTRUSIVE ROCKS reference system based on that of Map 2148, Ontario Mineral Map. 4 Undifferentiated, 4a Gabbro, metagabbro, anorthosite gabbro. 4b Pyroxenite. INTRUSIVE CONTACT M1GMATITE-METASEDIMENTARY- METAVOLCANIC COMPLEX 3 Undifferentiated. 3a Biotite-quartz-feldspar gneiss, 3 b Hornblende-quartz-feldspar gneiss. 3c Amphibolite. 3d Hybrid granitic gneiss. METAMORPHIC CONTACT FELSIC TO INTERMEDIATE META- GRAVITY MAP VOLCANICS 2a Rhyolite, dacite, trachyte: massive to foliated. 2b Felsic tuff.

INTERMEDIATE TO MAFIC META- VOLCANICS 1a Andesite, basalt; massivetofoliated. 1b Amphibolite, amphibole schist, amphibole-pyroxene-plagioclase gneiss.

Sulphide mineralization

a These deposts are not shown on this map, b Sextant Formation is the non-marine equivalent of the Stooping River formation, c Some diabase and carbonatite may be pre-Kapus- kasing Granulite Complex faulting. d Age of metamorphism uncertain.

The letter "G" preceding a rock unit number, for 7 S Dlb l example "65", indicates interpretation from geophys /Dla l ical data in drift covered areas. The letter "D" preceding a rock unit number, for example "D2a," indicates identification from drill cores.

SYMBOLS

Geological boundary. Contours of Equal Bouguer Gravity. Contour interval 10 Milligals- Synclinal axis.

Fault. -^.~,~,^^

Railway, with station or flagstop.

Winter road. MULHOLLAND

Aircraft landing facilities. GEOLOGICAL RELIABILITY DIAGRAM

Smaller community.

Mineral occurrence.

Onakawana Drillhole A Mining division with boundary. 0--80© Pleistocene ©-250© 14 250©-535© 13 © 535©-S36© 12fl Interprovincial boundary. , 836©-873© 12c 873©-1027© 12 .Moosonee 1027© 1060© 4 Township boundary.

Township boundary, unsurveyed.

Surveyed line.

MINERAL OCCURRENCES REFERENCE

B Semi-detailed mapping; 1"to1 mile. Adjoins Map 2161 gyp.. . Gypsum Mb. ..Niobium C Regional Reconnaissance mapping; 1"to 2 miles. Ra

MAP COMPILATION SOURCES

Geology and geological compilation south ofiat. 51"00© Map 2171 by G. Bennett, D.D. Brown, P,T. George, and assistants, 1966 for Operation Kapuskasing 1966.

Geological compilation and revision of areas under MOOSONEE SHEET lain by Paleozoic and Mesozoic rocks of map sheet by G. R. Guillet, 1968.

Geology from published and unpublished maps of the Geological Compilation Series Ontario Department of Mines, Quebec Department of Natural Resources, Geological Survey of Canada, and unpublished maps and reports of mining companies COCHRANE DISTRICT and Ontario Hydro Electric Power Commission, Records of assessment work on file at Resident Geolo gist©s Office, Timmins,

Gravity Anomaly Map derived from the Gravity An omaly Map of Canada, Dominion Observatories, De partment of Energy, Mines and Resources, Ottawa. Scale 1:253,440 or l Inch to 4 Miles Cartography by D. J. Hughes, Ontario Department of 10 14 Mines, 1968, Base maps compiled from National Topographic Sys Metres 5000 10 20 tem, sheets 42P and 32M, and Forestry Resources Inventory sheets of the Ontario Department of Lands and Forests.