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TitleIndicator mineral signatures of the Izok Lake Zn-Cu-Pb-Ag volcanogenic massive sulphide deposit, Nunavut: Part 2 till
AuthorHicken, A K; McClenaghan, M B; Paulen, R C; Layton-Matthews, D; Averill, S A; Crabtree, D
SourceGeological Survey of Canada, Open File 7343, 2013, 48 pages,
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
RelatedThis publication is related to the following publications
File formatreadme
File formatrtf; pdf; xls
AreaIzok Lake
Lat/Long WENS-112.5000 -112.0000 65.7500 65.5000
Subjectssurficial geology/geomorphology; economic geology; indicator elements; drift prospecting; drift deposits; tills; till geochemistry; till analyses; till deposits; volcanogenic deposits; sulphide deposits; sulphides; bedrock geology; igneous rocks; plutonic rocks; glacial deposits; mineralization; zinc; copper; lead; silver; pyrite; chalcopyrite; sphalerite; galena; pyrrhotite; gahnite; staurolite; loellingite; Yellowknife Supergroup; Itchen Formation; Contwoyto Formation; Point Lake Formation; Kenoran Orogeny; indicator minerals; Cenozoic; Quaternary
Illustrationslocation maps; tables; ternary diagrams; photomicrographs; photographs; flow charts
Natural Resources Canada Library - Ottawa (Earth Sciences)
ProgramGEM Tri-Territorial information management & databases (Tri-Territorial Indicator Minerals Framework), GEM: Geo-mapping for Energy and Minerals
LinksCanadian Database of Geochemical Surveys, downloadable files
LinksBanque de données de levés géochimiques du Canada, fichiers téléchargeables
Released2013 10 28
AbstractVolcanogenic massive sulphide (VMS) deposits have characteristic suites of indicator minerals; however, little research has been undertaken to determine which minerals may be useful to exploration in glaciated terrain. To date, few case studies have been conducted down-ice of known deposits. In response to this knowledge gap and to stimulate exploration in northern Canada, the Geological Survey of Canada, through its Geo-mapping for Energy and Minerals GEM Program (2008 - 2013), in collaboration with Queen's University, Minerals and Metals Group Limited (MMG) and Overburden Drilling Management Limited (ODM) examined the indicator minerals that characterize the Izok Lake Zn-Cu-Pb-Ag VMS deposit, Nunavut, and documented their glacial dispersal down-ice. Till samples down-ice of the Izok Lake deposit contain 10s to 1000s of grains/10 kg of chalcopyrite, sphalerite, galena, and pyrite up to 20 km down-ice (northwest). Gahnite is the most useful indicator of glacial dispersal from the Izok Lake VMS deposit because it is abundant in the deposit and till down-ice, sufficiently dense (specific gravity 4 - 4.6), physically robust, and easy to visually identify due to its distinctive blue-green colour. Gahnite in the area of the Izok Lake deposit is present in till at an abundance of 10 to 1000s grains/10 kg and was found at least 50 km down-ice. Staurolite may also be an indicator mineral of the deposit, but insufficient information is available about the modal abundance and ZnO content of staurolite in the deposit host rock. Sulphide minerals chalcopyrite, sphalerite, galena, loellingite, and pyrite are also useful indicators of the Izok deposit. However, they occur in low abundances in till down-ice from the deposit, and sulphide minerals are generally not physically and chemically robust, and therefore are unlikely to survive postglacial weathering of till.
Summary(Plain Language Summary, not published)
This report summarizes indicaotr mineral data for GSC till samples collected around the Izok Lake base metal volcanogenic massive sulphide deposit, western Nunavut. Mineral descriptions, mineral chemistry data for individual grains and mineral distribution maps for GSC till samples are presented.