Forty-Seventh Report, Department of Mines
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PROVINCE OF ONTARIO DEPARTMENT OP MINES HON. PAUI, LEDUC, Minister of Mines H. C. RICKABY, Deputy Minister FORTY-SEVENTH ANNUAL REPORT OF THE ONTARIO DEPARTMENT OF MINES BEING VOL. XLVII, PART VII, 1938 Geology of the Sandy Lake Area, by J. Satterly - - - - - 1-43 Geology of the North Spirit Lake Area, by J. D. Bateman - - 44-78 Recent Developments in the Favourable Lake Area, by J. D. Bateman ------------- 79-92 TORONTO Printed and Published by T. E. Bowman* Printer to the King's Most Excellent Majesty 1939 TABLE OF CONTENTS Vol. XLVII, Part VII GEOLOGY OP THE SANDY LAKE AREA PAGE PAGE Description of Properties.............. 39 Introduction..... .. ... .... .. .... l Dubeau-Dussault............. ..... 39 Acknowledgments................. 2 Sandborn.. ... .................. 40 Access and Canoe Routes. ... ..... 2 Tully-Burton.. .. ....... ...... 40 Previous Work................ ..... 3 Moar . .. .. .. .... .. ... ... 41 Topography. .... ..... .. .... ... 3 Dubeau Galena Showing.. .. .... .. 41 Drainage..... .......... .... ... .. 5 Walters-Shephard. ...... .... ....... 41 Inhabitants. ... .... ... ... .... .. 6 White. .... ...................... 41 Natural Resources. ... .......... 7 Hansen. .... ...... .... .... .. ..... 42 Climate......................... 7 Adams.... .. .... .... .. .. ... .. ... 42 Forests. ....................... 7 Other Mineralization. ....... ... ... 43 Fish and Game. ................. 8 Water Powers. .... ............. 8 Agriculture...................... 9 General Geology. ....... ............. 9 GEOLOGY OP THE NORTH SPIRIT LAKE AREA Keewatin Type. ................... 10 Volcanic Group. .......... .... ... 10 Andesite and Basalt... .. .. .. 10 Introduction. ... ......... .. .... 44 Grey Pillowed Basalt. .. .... ... 11 Acknowledgments. ....... ..... ..... 45 Gabbro-Diorite. .............. 12 Access............................ 45 Diabase Porphyry... ... ...... 12 Previous Exploration. ... ......... 46 Metamorphosed Equivalents. 13 Inhabitants. ... .... ... .. ....... 46 Volcanic Conglomerate and Tuff. 14 Natural Resources. ......... ... 47 Sediments.. ....... ... .. .... ... 15 Soil and Climate. .. ..... ...... ... 47 Iron Formation................ 16 Fur-bearing Animals, Fish, and Dacite Porphyry.. ........... 17 Game............... ....... ... 47 Sedimentary Group. ........... 19 Forests and Timber. ......... ... 48 Conglomerate...... ............ 19 Water Powers. ................. 48 Quartzite. ....... ............ 20 Drainage.......................... 49 Cordierite-Biotite Hornfels...... 20 Topography....................... 49 Chiastolite Hornfels............ 22 General Geology. ......... ....... .. 50 Limestone... ......... ........ 22 Keewatin Type. ............... ... 51 Iron Formation................ 22 Volcanic Formation. ......... ... 51 Sandborn Bay Sediments........ 22 Eastern Belt................ ... 52 Colgrove Lake Sediments. ..... 24 Central Belt................. .. 53 Sediments at East End of Sandy Western Belt. ................ 54 Lake.................. ..... 26 Sedimentary Iron Formation. .. 54 Severn River Sediments. .. 26 Timiskaming Type................. 56 Post-Keewatin(P). ..... ...... ... 27 Conglomerate Formation...... .... 56 Algoman(?). ........ ..... .... 28 North-Central Islands of North Granitic Intrusives............ ... 28 Spirit Lake.................. 57 West Arm-Finger Lake......... 29 Prospair Point................. 58 West Shore of West Arm and Is South of Makataiamik Lake .... 58 lands. ...................... 29 Sedimentary Formation........... 59 Rat House Bay................ 29 Arenaceous Sediments. ......... 59 Granite Bay................... 30 Argillaceous Sediments. .. ..... 60 South Shore, Adjacent Islands, Crystalline Limestone........... 60 and Niska Lake.............. 31 Structure of the North Spirit Lake Finger Lake, Kakapitam Lake, Series........ .. .......... .. .. 61 Rahill Lake, Bayly River. ... 31 Post-Timiskaming(?) Intrusives... .." 62 Rottenfish Lake Area........... 32 Granodiorite gneiss............... 62 Economic Importance of the In Diorite. .................... 63 trusives. .................... 32 Granite. ............... ......... 64 Pegmatite, Aplite. .............. 33 Granite Pegmatite Dikes....... ... 64 Porphyries, Felsite. ............. 33 Rhyolite Porphyry, Felsite, Felds Keweenawan(?).......... .......... 33 par Porphyry.................. 65 Pleistocene........................ 35 Diabase Dikes. ................. 65 Structural Geology................... 36 Deformation and Metamorphism..... 65 Folding........................... 36 Deformation. .. ................ 66 Fracturing and Shearing. ........... 38 Contact Metamorphism........... 67 Economic Geology. .. ................ 38 Pleistocene........................ 68 Prospecting Possibilities.... ......... 38 Economic Geology. ................ 69 Clay Deposits..................... 39 Gold............................. 96 [iii] IV Contents PAGE RECENT DEVELOPMENTS IN THE FAVOURABLE Economic Geology—Continued. LAKE AREA Lime. ... ... .. ..... .. .. 70 PAGE Iron................ ... ... 70 Introduction.... .. ... ............ .. .. 79 Description of Properties...... 70 Acknowledgments. ............ 79 Spirit Lake Gold Mines, Limited.. 70 Berens River Mines, Limited. .. ...... 79 History.. .. .... .. .. .. 70 History and Development........... 79 Mineralization. .. .. .. .. .. 70 Transportation. ........... 81 Camp Island and "W" Island Sec Communication.. ............ 81 tions . ... ..... ............. 71 Equipment.. .............. 82 "A" Location... ... .. .. .. 73 Power. .................. ... 82 "J" and "T" Locations. .. 75 Development. ..... ........ .. 83 Development. .... ... .. .. 75 Geology........................... 83 Prospectors Airways Company, Lim General. ... ..... .. .... ... 83 ited . ......................... 75 Table of Formations...... ..... ... 83 Interlac Gold, Limited.. .. 77 Petrology of the Country Rocks. 85 Keefe Group..... .. .... .. .. 77 Structure of the Veins. .....,. .. 86 Mining Corporation of Canada, Lim Mineralization of the Veins... 88 ited. .......................... 77 Character of the Ore Shoots. .. 91 Wynne Claims. ..... ... .. .. .. 77 Wentricia Mines, Limited. ...... .. 92 Other Properties.... .... .. .. .... 78 Other Claims. ...... .... ., . 92 ILLUSTRATIONS PAGE View looking north over Adams creek. ..... ..... .. .. ... .. ... ............ .. 4 Robert Fidler, chief of the Sandy Lake Indians....... ... ... .... ..... 6 "Apartments," Indian encampment on the Severn river. .. .. .. ... ........... .... 7 Fifteen-foot falls, outlet of Sandy Lake, into the Severn river.. .. ... ... ...... ... 8 Pillowed lava near the entrance of the West arm, Sandy lake. ... .... ...... ... .. 10 Sheared and drag-folded lavas on an island at the east end of Sandy lake....... .... .... 14 Volcanic conglomerate, north shore of Sandy lake between the Bayly and Mort rivers. .. lo Banded iron formation on a small island off Fishtail point, Sandy lake. .......... .. 16 Dacite porphyry showing flow breccia(?) structure, south shore of the Northwest arm . ... 17 Fold in dacite porphyry with lit par Itt granitic material, west of the Northwest arm. .... 18 Cordierite hornfels on an island in the main part of Sandy lake.... .. ........... .. .. 20 Small anticline in the sediments on the north shore of the north bay of the West arm. .. 24 Water-etched surface of brecciated crystalline limestone, Severn river. ........... .. .... 26 Eight-foot falls on the Flanagan river...... ... ......... ......................... .... 49 Pillow lava in which pillows are sheathed in felsite...... .... ..... .. .......... .. .. .. 52 Weathered amygdaloidal pillow lava south of Tahoe lake. .. .. ... .. ........ .. .... 53 Iron formation outcropping on an island northeast of Prospair point. ................. ... 54 Hand specimen showing drag fold in iron formation... .... ....... .............. .. .. 55 Conglomerate on one of the north-central islands of North Spirit lake. ........ .... .. .. 56 Stretched chert pebble from conglomerate formation on Prospair point. ........... .... ... 57 Hand specimen of a closely packed chert pebble conglomerate from Prospair point.. .. ... 57 View of specimen of chert pebble conglomerate oriented with respect to its position in the field 58 Hand specimen of garnetiferous phyllite from the west end of North Spirit lake ........ .. 59 Interbedded greywacke and argillaceous material, North Spirit Lake area............. ... 60 Hand specimen of grey pegmatite showing black tourmaline crystals.... ........ .. .. ..... 65 Andalusite gneiss, west of Atikamik lake. ....... ................................... 66 Porphyroblastic cordierite and sillimanite schist. ........ ..... ........................ 67 Glacially grooved and smoothed rocks on one of the north-central islands of North Spirit lake 68 Fracture in massive diorite on Camp island filled with solid arsenopyrite. ..... .... .. .. ... 71 Mining plant at the Berens River mine.... ... .. .... .. .. ....... .. .. .. 82 Photomicrograph of a thin section of light-coloured country rock from the Berens River mine 85 Photomicrograph of a polished section of ore from the Berens River mine, showing the rela tion of galena to pyrite.. ...... .. .. ... .... .... ... .. ...-. ..... ... .... 88 Photomicrograph of a polished section of ore from the Berens River mine, showing the rela tion of galena to sphalerite. .... .. .... .... ... .. .................. .. 89 Photomicrograph of a polished section of ore from the Berens River