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TitleDataset of geochemical data from iron oxide alkali-altered mineralising systems of the Great Bear magmatic zone, Northwest Territories
AuthorCorriveau, L; Lauzière, K; Montreuil, J -F; Potter, E G; Hanes, R; Prémont, S
SourceGeological Survey of Canada, Open File 7643, 2015, 24 pages, (Open Access)
PublisherNatural Resources Canada
Documentopen file
Mediadigital; on-line
File formatreadme
File formatpdf; xlsx; rtf
ProvinceNorthwest Territories
NTS85M; 85N; 85O; 86A; 86B; 86C; 86D; 86E; 86F; 86G; 86J; 86K; 86L
AreaLou Lake; Cole Lake; Fab Lake; Hottah Lake; Great Bear Lake; Gameti
Lat/Long WENS-120.0000 -116.0000 67.0000 63.0000
Subjectseconomic geology; geochemistry; mineral occurrences; mineral deposits; iron oxides; copper; gold; uranium; mineralization; uraninite; geochemical interpretations; geochemical analyses; analytical methods; whole rock analyses; whole rock geochemistry; Great Bear Magmatic Zone; Slave Craton; Phanerozoic
Illustrationslocation maps; tables; plots
ProgramGEM2: Geo-mapping for Energy and Minerals, Mackenzie Corridor Project Management
Released2015 06 18
AbstractThe Great Bear magmatic zone is a Paleoproterozoic calc-alkaline to shoshonitic volcano-plutonic belt in the Northwest Territories of Canada. The region hosts regional-scale iron oxide and alkali-alteration mineral systems with polymetallic iron oxide copper-gold (IOCG) deposits and prospects as well as iron oxide±apatite, skarn and albitite-hosted uranium mineralisation. In the course of phase-three Targeted Geoscience Mapping program and phase-one Geo-mapping for Energy and Minerals program as well as in 1973 for the Bear Province lithogeochemical survey project, a total of 1720 samples were collected across these iron oxide alkali alteration systems between 2005 and 2012 and their chemical composition analysed by complementary methods. In this Open File, we report over 3500 lithogeochemical analyses (including analyses from distinct laboratories, duplicates and standards). In these samples, metals above the NORMIN cut-off grades for mineral showings include base, precious, strategic and specialised metals including rare-earth elements as well as uranium and thorium. The format chosen for the data set is tailored for geographic information systems (GIS); all samples are georeferenced and as such the data set locates all the anomalous metal concentrations encountered during the aforementioned projects. Metadata is being provided on the sampling protocols, the analytical methods, and the quality control results. This complete data set of analyses is also being published to serve as an electronic supplement to current and future scientific publications associated with these projects as well as a support for a subsequent open file where the best results per elements will be compiled. As such, this dataset provides the documentation for the commonalities observed in the chemical fingerprints of each hydrothermal alteration facies across the varied systems and anchor the refined lithogeochemical exploration methods developed for IOCG and affiliated deposits. In addition, the dataset can be used as baseline knowledge for the natural geological environment of the belt that guides the natural metal distribution in glacial sediments, soils, water and biomass.
Summary(Plain Language Summary, not published)
This geochemical dataset compiles new geochemical results from various labs including ACME, ALS laboratories, Becquerel and INRS labs. The geochemistry was done to characterize iron oxide copper gold (IOCG) and affiliated types of multiple metals mineralization in selected areas of the Great Bear magmatic zone, Northwest Territories. The area falls largely within the Wek¿èezhìi management region reaching across the Sahtu region and the limit of Tliçho Private Land. The compilation of this dataset was undertaken under the IOCG-Great Bear project of the Geo-mapping for Energy and Minerals (GEM) Program.