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TitleRare earth element indicator minerals: an example from the Strange Lake deposit, Québec and Labrador
AuthorMcClenaghan, M B; Paulen, R C; Kjarsgaard, I M; Fortin, R
SourceQuébec Mines 2017: abstracts volume; 2017, 1 pages
Alt SeriesNatural Resources Canada, Contribution Series 20170248
PublisherQuebec Mines
MeetingQuébec Mines 2017; Québec, PQ; CA; November 20-23 novembre 2017
Mediaon-line; digital
AreaStrange Lake
Subjectsmetallic minerals; economic geology; indicator elements; glacial deposits; rock analyses, rare earth elements; rare earths; tills; thorite; thorianite; pyrochlore; monazite; allanite; glacial dispersion
ProgramHudson/Ungava, Northeastern Quebec-Labrador, surficial geology, GEM2: Geo-mapping for Energy and Minerals
AbstractCurrently no rare earth element (REE) metals are mined or processed in Canada, however, significant REE resource potential exists. Because Canada has a glaciated landscape, indicator mineral methods have the potential to be useful exploration tools. The undeveloped Strange Lake peralkaline complex is one of the world¿s largest deposits of Zr, Y, and heavy rare earth elements (HREE) and an ideal site for the Geological Survey of Canada to test modern indicator mineral methods for detecting REE deposits. Boulders, cobbles, and glacial sediment have been dispersed in a ribbon-shaped train by fast flowing ice (i.e., an ice stream). The resultant glacial dispersal train can be traced for more than 50 km down-ice to the east-northeast using airborne gamma-ray spectrometry, till geochemistry, and indicator minerals. The Strange Lake deposit contains a large number of oxide and silicate, phosphate, and carbonate indicator minerals, some of which were observed in till overlying and up to 50 km down-ice. The most useful indicator minerals of the REE mineralization in the 0.25-2.0 mm heavy mineral fraction of till include Zr-silicates (secondary gittinsite and many other hydrated Zr±Y±Ca-silicates), pyrochlore, thorite/thorianite, monazite/rhabdophane, chevkinite, parasite, bastnaesite, kainosite, and allanite. This case study demonstrates that REE indicator minerals can now be added to a large suite of indicator minerals that are used to explore glaciated terrain for a broad range of deposit types and commodities.
Summary(Plain Language Summary, not published)
Reporting of results of a study of the minerals present in the Strange Laker rare earth element deposit (Quebec and Labrador) and how these minerals can be used to explore for other rare earth elements deposits across Canada using surficial sediments.