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Copper Pass Deposit (BM; NIX; GOGO; Sachowia Lake), Great Slave Lake, Northwest Territories, Canada

A minor past producer of nickel and bismuth, various attempts at exploration and mining date back to 1940.

"Mineralization occurs in fractures filled with quartz and carbonate within Archean metavolcanics and minor associated sediments of the Yellowknife Group and within granite dykes. Metallic minerals that have been reported are: niccolite, skutterudite, gersdorffite, rammelsbergite, annabergite, erythrite, arsenopyrite, native antimony, pyrite and chalcopyrite. The main zone, which occurs near the margin of a diabase dyke, is located across the SW limb of a conjugate fault system with the massive niccolite lens in a hanging-wall felsite-breccia along a minor NE striking fault."

"Mineralization appears to be associated particularly with bands of red granite which have been sheared and brecciated, and which have been veined or cemented by carbonate and lesser quartz. Niccolite, skutterudite, gersdorffite, rammelsbergite, arsenopyrite, pyrite and chalcopyrite occur in structurally controlled quartz-carbonate veins and vein breccias."



References:
Northwest Territories Geoscience Office Showing ID 075LSW0001 http://ntgomap.nwtgeoscience.ca/showing_detail.jsp?showingID=075LSW0001)





Map Reference: 62°24'35"N , 111°51'43"W

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Mineral List:
Annabergite
Antimony
Arsenopyrite
Biotite
Chalcopyrite
Erythrite
Gersdorffite
Nickeline
Pyrite
Quartz
Rammelsbergite
Skutterudite


12 entries listed. 11 valid minerals.

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Copyright © Jolyon Ralph and Ida Chau 1993-2009. Jobs in Northwest Territories, Canada Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 23rd Oct 2009 15:26:58