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TitleMajor-, minor-, and trace-element geochemistry of sulphide indicator minerals from surficial sediments, southwestern Northwest Territories
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AuthorKing, R D; Piercey, S J; Paulen, R C; Petrus, J A
SourceGeological Survey of Canada, Open File 8547, 2019, 11 pages, https://doi.org/10.4095/314688 (Open Access)
Year2019
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
File formatreadme
File formatpdf; xlsx
ProvinceNorthwest Territories
NTS85C; 85D; 85E/01; 85E/02; 85E/03; 85E/4; 85E/05; 85E/06; 85E/07; 85E/08; 85E/09; 85E/10; 85E/11; 85E/12; 85F/01; 85F/02; 85F/03; 85F/04; 85F/05; 85F/06; 85F/07; 85F/08; 85F/09; 85F/10; 85F/11; 85F/12; 95A; 95B/01; 95B/02; 95B/07; 95B/08; 95B/09; 95B/10; 95B/15; 95B/16; 95G/01; 95G/02; 95G/07; 95G/08; 95G/09; 95G/10; 95H/01; 95H/02; 95H/03; 95H/04; 95H/05; 95H/06; 95H/07; 95H/08; 95H/09; 95H/10; 95H/11; 95H/12
AreaMackenzie River; Great Slave Lake; Sambaa K'e; Trout Lake; Ka'a'gee Tu; Kakisa Lake; Lue Túé Sulái; Jean Marie River; Tathlina Lake; Liard River
Lat/Long WENS-123.0000 -116.2500 61.6667 60.0000
Subjectseconomic geology; geochemistry; surficial geology/geomorphology; trace element geochemistry; major element geochemistry; minor element geochemistry; mineral deposits; sulphide deposits; copper; lead; zinc; mineral occurrences; mineral exploration; mineralization; ore mineral genesis; drift prospecting; isotopic studies; lead isotope ratios; sulphur geochemistry; sphalerite; galena; chalcopyrite; arsenopyrite; source rocks; sediment dispersal; dispersal patterns; bedrock geology; lithology; kimberlites; scanning electron microscope analyses; spectrometric analyses; mass spectrometer analysis; Pine Point Deposit; Western Canada Sedimentary Basin; Canadian Shield; Canadian Cordillera; Fort Simpson Formation; Olivut Kimberlite; Trout Lake Fault Zone; Rabbit Lake Fault Zone; Tathlina Fault Zone; Cameron Hills Structure; Howard's Pass Deposit; Selwyn Basin; Blende Deposit; Tom Deposit; Giant Mine; Meguma Gold Deposits; Phanerozoic; Cenozoic; Quaternary; Mesozoic; Cretaceous; Paleozoic; Devonian; Precambrian
Illustrationsgeoscientific sketch maps; plots
ProgramMackenzie Corridor, Southern Mackenzie Surficial Mapping, GEM2: Geo-mapping for Energy and Minerals
Released2019 05 15
AbstractTill sample surveys were conducted near the headwaters of the Mackenzie River in 2007, 2008, and 2012, as part of the Northwest Territories Geological Survey's Protected Area Strategy surveys. Numerous sphalerite, galena, chalcopyrite, and arsenopyrite grains were recovered from many of the till samples. No proximal, up-ice mineralized bedrock source for these sulphide grains has been found to date, with the nearest known outcropping bedrock source of sphalerite and galena being the Qito Pb-Zn showing (~274 km to the northeast) and the Pine Point Mississippi Valley-type (MVT) Pb-Zn deposit (~400 km to the east). The sulphide indicator mineral grains were analysed via electron probe micro analysis and laser ablation-inductively coupled plasma-mass spectrometry to determine their major, minor and trace elemental composition to elucidate their potential bedrock source and to characterize the potential host mineralization type. Sphalerite grains are Fe-poor, having up to 5.07 wt% (6.38 mol% FeS) with Cd abundances up to 2.21 wt% (0.97 mol% CdS); they also have variable Cu, Ga, Ge, In, Ag, Sn, As, Te, Sb, and Bi. Most trace elements in galena are below the limit of detection with the exception of Ag, Cd, In, Sn, Sb, Te, and Bi. Similarly, most trace elements in chalcopyrite are in low abundance, with the exception of Zn, Ge, As, Se, Ag, In, Sn, and Bi. Arsenopyrite grains contain Co, Ni, Cu, Ge, Se, Ag, In, Sb, Te, Au, and Bi; all other elements analysed are below the detection limit. The trace element compositions of sphalerite and galena are indicative of deposition in a low temperature (and low aS2) environment, such as carbonate-hosted MVT Pb-Zn mineralization. Chalcopyrite and arsenopyrite mineral chemical data do not provide signatures that are diagnostic of a specific deposit type.
Summary(Plain Language Summary, not published)
These are the Protected Area Strategy indicator mineral grains donated to the GSC from the Northwest Territories Geological Survey which have undergone probe analysis for their chemistry. This report is a publication of the mineral probe chemistry, in support of Robert King's MSc thesis.
GEOSCAN ID314688