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Metallic Minerals Electronic Capture, 2011 The PDF file from which this document was printed was generated by scanning an original copy of the publication. Because the capture method used was 'Searchable Image (Exact)', it was not possible to proofread the resulting file to remove errors resulting from the capture process. Users should therefore verify critical information in an original copy of the publication. Department of Mines, Natural Resources and Environment MANIT~BA MINERAL RESOURCES DIVISION MRD Educational Series 78/2 Minerals of Manitoba Volume II: Metallic minerals by K.A. Phillips Ph.D., P. Eng. Winnipeg 1979 1 Minerals of Manitoba Volume II: Metallic Minerals Foreword ...................................................................................... 3 Iron oxide minerals ............................................................................ 9 Copper-zinc ore-suites ........................................................................ 20 Nickel-copper ore-suites ...................................................................... 30 Gold ore-suites ................................................................................ 40 References .................................................................................... 59 Indexed Mineral Table ........................................................................ 64 Maps .......................................................................................... 68 Cover plates: Top left - Gold in limonitic veinlets cutting vein quartz (Elbow Lake) Top right - Pyrrhotite accompanied by large black hornblende crystals and cut by small chalcopyrite veinlet (Dumbarton mine) Bottom left - Chalcopyrite ore with graphitic gangue material (Mandy mine) Bottom right - Sphalerite ore with minor pyrite and white plagioclase (Chisel Lake Mine) 2 Foreword This publication is the third in an educational Canada highway at Falcon Lake. The numerous series intended to introduce the general public to rock-dumps to be found on the surface at old mine­ the rocks and minerals of Manitoba. The first, sites and near abandoned shafts are of great interest entitled Common Rocks in Manitoba (1975), to rockhounds and mineral collectors. I n thus introduced the layman to the principal rocks likely describing both the operational and worked out to be encountered. The rock-forming, pegmatitic mines of the province, as well as many exploration and non-metallic minerals were then described in shafts, much information is incidentally given the first volume of Minerals of Manitoba (1978), about the history of mining in Manitoba. The main with details of their occurrences throughout the purpose is, however, to describe Manitoba's rocks province. This paved the way for the present and minerals to the general public, while volume which, in describing Manitoba's metallic references to source documents are given at r1inerals, gives examples from widespread out­ frequent intervals for the benefit of readers who crops, orebodies and mineral deposits, some as far may be interested in greater geological detail. north as Lynn Lake, and others near the Trans- 3 Colo.... Plates 1. Octahedra of magnetite in chlorite schist cut by quartz veinlets (Museum) .... 18 2. Specularite crystals on magnetite-hematite groundmass (Museum) ............ 18 3. Oolitic hematite (Museum) ...................................................... 18 4. Spherulitic hematite (turgite) with interstitial calcite (Black Island) ............. 18 5. Botryoidal goethite, showing radiating fibrous structure (Museum) ............ 18 6. Weathered limonitic surface of pyrrhotite-rich andesite (Bird River area) ...... 18 7. Typical structure of limonitic gossan (Museum) ................................. 19 8. Polished slab of chromite ore showing banding (Bird River Sill) ............... 19 9. Cubic and distorted pyritohedral crystals of pyrite (Anderson Lake Mine) ..... 19 10. Botryoidal pyrite with vein quartz (Dumbarton mine) .......................... 19 11. Large pyrite crystals in pyrrhotite-chalcopyrite groundmass (Osborne Lake Mine) 19 12. Radiating prisms of marcasite (Museum) ........................................ 19 13. Large crystals of pyrite surrounded by chalcopyrite in pyrrhotitic groundmass (Stall Lake Mine) ................................................................. 28 14. Pyrrhotite with sphalerite, chalcopyrite and pyrite (Sherridon mine) ........... 28 15. Chalcopyrite ore with graphitic gangue material (Mandy mine) ................ 28 16. Sphalerite ore with minor pyrite and white plagioclase (Chisel Lake Mine) .... 28 17. Massive, fine-grained pyrite, veined by sphalerite (FUn Flon Mine) ............ 28 18. Galena crystals, showing cubic form and cleavage (Museum) .................. 28 19. Galena with pyrite and chalcopyrite, in vein cutting andesite (Chisel Lake Mine) 29 20. Chalcopyrite in chlorite schist (Flin Flon Mine) ................................. 29 21. Argillaceous host-rock showing pyrrhotitic and pyrite-chalco pyrite-rich bands (White Lake Mine) ............................................................... 29 22. Pyrite crystals and cu bic aggregates, partially oxidized to rusty brown goethite (Baker Patton deposit) ........................................................... 29 23. Pseudomorphic pyrrhotite in chalcopyrite groundmass (Anderson Lake Mine) 29 24. Pyrrhotite with chlorite-biotite gangue, accompanied by chalcopyrite and large pyrite crystals (Stall Lake Mine) ................................................. 29 25. Pyrite-chalcopyrite ore with minor magnetite (Stall Lake Mine) ................ 38 26. Large aggregates of fine-grained pyrite in chalcopyrite-pyrrhotite-pyrite ground- ground- mass (Osborne Lake Mine) .................................................... " 38 27. Large pyrite crystals surrounded by pyrrhotite in chalcopyrite ore (Ruttan Mine) 38 28. Polished slab showing pyrite-pyrrhotite interbanded with dark hematitic gangue material (Ruttan Mine) .......................................................... 38 29. Pyrrhotite accompanied by vein quartz with pink feldspar (Lynn Lake Mine) .. 38 4 30. Pyrrhotite accompanied by large black hornblende crystals and cut by small chalcopyrite vein let (Dumbarton mine) ......................................... 38 31. High-grade pentlandite ore with much pyrrhotite and chalcopyrite (Lynn LakE Mine) ............................................................................ 39 32. Gersdorffite crystals with plagioclase (Museum) ................................ 39 33. Specimen of massive nickeline (Museum) ....................................... 39 34. Chalcopyrite-rich ore with minor pyrrhotite and small amphibole crystals; gab­gab- broic gangue (Lynn Lake Mine) ................................................. 39 35. Serpentinite with minor pyrrhotite (Pipe Mine) ................................. 39 36. Massive pyrrhotite ore crossed by pyrite veinlet and containing insets of magnetite (Pipe Mine) ........................................................... 39 37. Biotite schist containing fine-grained pyrrhotite (Thompson Mine) ............. 50 38. Pegmatitic feldspar accompanied by pyrrhotite with biotite (Thompson Mine) 50 39. Coarse breccia-ore showing large biotite-quartz fragment in pyrrhotite-pyrite­pyrrhotite-pyrite- biotite groundmass (Thompson Mine) .......................................... 50 40. Polished slab of pyrrhotite breccia-ore showing black gangue fragments (Thompson Mine) ............................................................... 50 41. Pyrrhotite and minor chalcopyrite associated with large hornblende crystals (Dumbarton mine) ............................................................... 50 42. Free gold in quartz (San Antonio mine) ........................................ 50 43. Gold in limonitic veinlets cutting vein quartz (Elbow Lake) .................... 51 44. Arsenopyrite crystals accompanied by quartz prisms (Museum) ................ 51 45. Arsenopyrite crystals with quartz (Museum) .................................... 51 46. Bluish black, platy molybdenite (Barren Lake) .................................. 51 47. Gold-bearing pyrite in quartz (San Antonio mine) .............................. 51 48. Gold-bearing chalcopyrite in blue quartz (Cryderman property) ............... 51 Blaek and White Plates A Banded iron formation showing magnetite and quartz bands (Knee Lake) ....... 9 B Hematite in the form known as kidney-ore (Museum) ........................... 10 C White pseudomorphs of serpentine after olivine in black chromite groundmass (Bird River Sill) ..................................................................... 10 D Pyrite with vein quartz; network structure due to leaching (Ruttan Mine) .......... 21 E Polished slab showing banding in pyrite-chalcopyrite ore (North Star mine) ...... 21 F Bands of fine-grained pyrrhotite in andesite (Dumbarton mine) .................. 30 5 Photography All photographs were taken by Peter R. Beech of the Manitoba Government's Information Services. Museum specimens were kindly lent by Dr. G.E. Lammers, Chief Curator of the Manitoba Museum of Man and Nature. Others were from the collection of the Mineral Resources Division. Colour separations by Litho Color Services Ltd. Maps A West Hawk and Falcon Lakes area ................................................. 69 B Bird River Cat Lake area ......................................................... 70 C Rice Lake Beresford Lake area ................................................... 71 D Black Island,
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