00000nam 2200000zi 4500 9.956640 CaOODSP 20251031142449 m o d f cr mn||||||||| 251023t20202020onca ob f000 0 eng d CaOODSP eng rda CaOODSP n-cn-qu M183-2/8752E-PDF Desbarats, Adrian J., author. Geoenvironmental characterization of ferroniobium slag, Saint Lawrence Columbium Mine, Oka, Québec / A.J. Desbarats, J.B. Percival, P. Pelchat, J. Sekerka, I. Bilot, I. Girard, and P. Gammon. [Ottawa] : Natural Resources Canada = Ressources naturelles Canada, 2020. ©2020 1 online resource (ix, 69 pages) : illustrations (chiefly colour). text txt rdacontent computer c rdamedia online resource cr rdacarrier Geological Survey of Canada open file, 2816-7155 ; 8752 Erratum inserted. ISSN of series supplied from ISSN Portal. Includes bibliographical references (pages 55-59). "Between 1961 and 1976, the St. Lawrence Columbium mine produced pyrochlore concentrate from a niobium-bearing carbonatite deposit near Oka, Québec. Beginning in 1971, the pyrochlore concentrate was converted into ferroniobium alloy through an aluminothermic reduction process, which also yielded slag as a waste product. Uranium and thorium occurring as impurities within the pyrochlore are preferentially sequestered in the slag. This report is concerned with the environmental characteristics of the slag including its physical properties, mineralogy, chemistry, radioactivity, and the chemistry of its leachate. …"-- Summary and conclusions, page 54. Slag Québec (Province) Oka Region Analysis. Leachate Québec (Province) Oka Region Analysis. Niobium industry Waste disposal Québec (Province) Oka Region. Laitiers (Métallurgie) Québec (Province) Oka, Région d' Analyse. Produit de lixiviation Québec (Province) Oka, Région d' Analyse. Niobium Industrie Déchets Élimination Québec (Province) Oka, Région d'. Geological Survey of Canada, issuing body. Open file (Geological Survey of Canada) 8752. (CaOODSP)9.506878 PDF 45.40 MB https://publications.gc.ca/collections/collection_2025/rncan-nrcan/m183-2/M183-2-8752-eng.pdf Open file report HTML N/A https://doi.org/10.4095/327565 Complete dataset