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TitleIndicator mineral signature of the Strange Lake rare earth element deposit, Quebec and Newfoundland and Labrador
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorMcClenaghan, M B; Paulen, R C; Kjarsgaard, I M; Averill, S A; Fortin, R
SourceGeological Survey of Canada, Open File 8240, 2017, 45 pages, (Open Access)
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
File formatreadme
File formatpdf (Adobe® Reader®); rtf; xlsx (Microsoft® Excel®)
ProvinceNewfoundland and Labrador; Quebec
AreaStrange Lake; Lac Brisson
Lat/Long WENS -64.2500 -64.0000 56.3667 56.2500
Subjectseconomic geology; surficial geology/geomorphology; geochemistry; mineralogy; geophysics; mineral deposits; mineral exploration; heavy mineral samples; densities; rock analyses; glacial deposits; tills; glacial landforms; crag and tail; till samples; till analyses; clasts; oxides; silicates; phosphates; carbonates; Archean; bedrock geology; lithology; igneous rocks; intrusive rocks; granites; monzonites; metamorphic rocks; gneisses; mineralogical analyses; geophysical interpretations; radiometric interpretations; gamma-ray surveys; thorium; glaciation; ice flow; ice movement directions; lineations; sediment transport; sediment dispersal; remote sensing; radar imagery; geochemical analyses; beryllium; zirconium; cesium; petrographic analyses; Strange Lake Peralkaline Complex; Mistastin Domain; Mistinibi-Raude Domain; Kogaluk River Ice Stream; indicator minerals; rare earth elements; digital elevation models; Shuttle Radar Topographic Mission (SRTM); electron microprobe analyses; Precambrian; Proterozoic
Illustrationslocation maps; geoscientific sketch maps; tables; digital elevation models; photographs; flow diagrams; photomicrographs; diagrams
ProgramGEM2: Geo-mapping for Energy and Minerals, Hudson/Ungava, Northeastern Quebec-Labrador, surficial geology
ProgramTargeted Geoscience Initiative (TGI-4), Rare-Metal Ore Systems
Released2017 12 05
AbstractThe first detailed study of the indicator mineral signature of a major rare earth element (REE) deposit in glaciated terrain was undertaken at the Strange Lake Zr-Y-HREE deposit in northern Quebec and Newfoundland and Labrador, Canada. The heavy mineral (>3.2 SG) and mid-density (3.0-3.2 SG) nonferromagnetic fractions of bedrock samples from the two mineralized zones were examined to determine potential indicator minerals of REE mineralization. Till samples overlying and up to 50 km down-ice of the deposit were examined to determine the abundance of these minerals at varying distances from the deposit. The deposit contains numerous oxide, silicate, phosphate, and carbonate indicator minerals. Some of the minerals observed in both the bedrock and till samples had not been previously reported for the Strange Lake deposit. The most useful indicator minerals were determined to be Zr-silicates (primary elpidite, secondary gittinsite, and many other hydrated Zr±Y±Ca-silicate minerals), pyrochlore, thorite/ thorianite, monazite/rhabdophane, chevkinite, parisite, bastnaesite, kainosite, and allanite. Rare earth element indicator minerals can now be added to the expanding list of indicator minerals that can be used to explore for a broad range of deposit types and commodities, i.e., diamonds, precious metals, base metals, and strategic metals.
Summary(Plain Language Summary, not published)
This report described the indicator mineral results for till samples collected around the Strange Lake rare earth element deposit in northern Quebec-Labrador by the GSC as part of the GEM-2 Hudson Ungava Project.