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TitreRare earth element indicator minerals: an example from the Strange Lake deposit, Québec and Labrador
AuteurMcClenaghan, M B; Paulen, R C; Kjarsgaard, I M; Fortin, R
SourceQuébec Mines 2017: abstracts volume; 2017, 1 pages
Année2017
Séries alt.Ressources naturelles Canada, Contribution externe 20170248
ÉditeurQuebec Mines
RéunionQuébec Mines 2017; Québec, PQ; CA; Novembre 20-23 novembre 2017
Documentlivre
Lang.anglais
Mediaen ligne; numérique
Sujetséléments d'indice; dépôts glaciaires; analyses de la roche, éléments de terres rares; terres rares; tills; thorite; thorianite; pyrochlore; monazite; allanite; minéraux métalliques; géologie économique
ProgrammeNord-est du Québec-Labrador, géologie des dépôts meubles de la région d'Hudson/Ungava, GEM2 : La géocartographie de l'énergie et des minéraux
Résumé(disponible en anglais seulement)
Currently 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.
Résumé(Résumé en langage clair et simple, non publié)
Communication des résultats d'une étude des minéraux présents dans le gisement d'éléments de terres rares Strange Laker (Québec et Labrador) et de la façon dont ces minéraux peuvent être utilisés pour explorer d'autres gisements d'éléments des terres rares au Canada en utilisant des sédiments superficiels.
GEOSCAN ID306135