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TitleGeoenvironmental characteristics of gold and critical metal deposits / Caractéristiques géo-environnementales de l'activité aurifère et des dépôts de métaux critiques
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AuthorParsons, M
SourcePublic presentations of May 21st, 2019: Environmental Geoscience Program, current status of research projects (phase 2014-2019); by Jacob, N; Parsons, M; Rivard, C; Savard, M M; Larmagnat, S; Outridge, P M; White, D; Kao, H; Lintern, G; Geological Survey of Canada, Scientific Presentation 104, 2019 p. 5-18, (Open Access)
PublisherNatural Resources Canada
Lang.English; French
Mediaon-line; digital
RelatedThis publication is contained in Jacob, N; Parsons, M; Rivard, C; Savard, M M; Larmagnat, S; Outridge, P M; White, D; Kao, H; Lintern, G; (2019). Public presentations of May 21st, 2019: Environmental Geoscience Program, current status of research projects (phase 2014-2019), Geological Survey of Canada, Scientific Presentation no. 104
File formatpdf (Adobe® Reader®)
ProvinceQuebec; Northwest Territories
NTS31G/08; 75L; 75M; 76D; 85I; 85J; 85O; 85P; 86A; 86B
AreaOka; Yellowknife; Great Slave Lake
Lat/Long WENS -74.5000 -74.0000 45.5000 45.2500
Lat/Long WENS-116.0000 -110.0000 65.0000 62.0000
Subjectsenvironmental geology; geochemistry; mineralogy; paleontology; surficial geology/geomorphology; economic geology; Nature and Environment; Science and Technology; Government and Politics; Economics and Industry; environmental studies; environmental impacts; mining; mine waste products; tailings; slag; mineral deposits; metals; gold; niobium; carbonatites; limnology; trace element geochemistry; radionuclides; micropaleontology; climate; transport mechanisms; pollutants; arsenic geochemistry; lake sediment geochemistry; surface waters; water geochemistry; carbon geochemistry; permafrost; ground ice; wetlands; thorium geochemistry; uranium geochemistry; modelling; Environmental Geoscience Program (EGP); St. Lawrence Columbium (SLC) Mine; Tundra Mine; Slave Geological Province; environmental impact assessment; anthropogenic impacts; waste water; rare earth elements; mine remediation; decision making; regulation; traditional knowledge; Indigenous peoples; Indigenous culture; environmental baseline studies; cumulative effects; climate change; metalloids; metal speciation; waste rock geochemistry
Illustrationsphotographs; satellite images; profiles; plots; location maps; geoscientific sketch maps; schematic representations; photomicrographs
ProgramEnvironmental Geoscience, Program Management
Released2019 10 10
AbstractThe Critical Metals Activity used detailed geochemical, mineralogical, and limnological methods to characterize processes controlling the mobility of trace elements and radionuclides in mine wastes and waters at the abandoned St. Lawrence Columbium (SLC) Mine in Oka, Quebec. This mine operated from 1961 to 1976 and at the time was one of the largest niobium (Nb) producers in the world. Geologically, the SLC Mine is very similar to several other carbonatite-hosted mineral deposits across Canada that are being considered for mining of elements used in green energy and high-tech applications, including Nb and rare earth elements (REE). These studies have generated new geoscience knowledge on the potential environmental impacts of mining critical metals and have been used by the Québec Ministère de l'Energie et des Ressources Naturelles (MERN) to help guide remediation decisions for the SLC Mine site. The results will also help industry and regulators to improve environmental predictions for future Nb- and REE-mining projects and to support the development of new environmental guidelines.
The Northern Baselines (Geoscience Tools for Environmental Assessment of Metal Mining) Activity used a multidisciplinary geochemical, paleolimnological, micropaleontological, and traditional knowledge approach to produce new geoscience knowledge on baseline geochemistry and cumulative impacts of geogenic and anthropogenic processes, particularly climate variability, on the transport and fate of metal(loid)s in mineralized regions of northern Canada. New geoscience knowledge on the role of climate variability on speciation of arsenic in porewater and sediments, and the seasonal cycling of metalloids between surface waters and sediments has implications for Environmental Assessment, remediation of contaminated sites, including Crown lands, and new development. The activity also generated new knowledge on the impacts of 21st century climate change on long-term carbon dynamics in permafrost wetlands, important for understanding feedback mechanisms and global carbon cycling.