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Geoenvironmental characteristics of gold and critical metal deposits—Caractéristiques géo-environnementales de l'activité aurifère et des dépôts de métaux critiques

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doi: 10.4095/314918
Authors:Parsons, M.
Volume Title:Public presentations of May 21st, 2019: Environmental Geoscience Program, current status of research projects (phase 2014-2019)
Volume Authors:Jacob, N.; Parsons, M.; Rivard, C.; Savard, M. M.; Larmagnat, S.; Outridge, P. M.; White, D.; Kao, H.; Lintern, G.
Source:Public presentations of May 21st, 2019: Environmental Geoscience Program, current status of research projects (phase 2014-2019), N. Jacob, M. Parsons, C. Rivard, M. M. Savard, S. Larmagnat, P. M. Outridge, D. White, H. Kao and G. Lintern. Scientific Presentation - Geological Survey of Canada, Vol.104, p.5-18. Publisher: Geological Survey of Canada, Ottawa, ON, Canada
Publication Date:2019
Note:In English and French and English with English summary. This publication is contained in 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, 2019; illus.
Summary:The 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.
Subjects:Actinides; Arsenic; Carbon; Carbonatites; Climate; Climate change; Decision-making; Environmental geology; Geochemistry; Gold ores; Ground ice; Hydrochemistry; Hydrology; Ice; Igneous rocks; Industrial waste; Isotopes; Lacustrine environment; Limnology; Metal ores; Metals; Micropaleontology; Mine waste; Mineral resources; Mining; Models; Niobium ores; Permafrost; Pollutants; Pollution; Radioactive isotopes; Regulations; Sediments; Slag; Surface water; Tailings; Thorium; Trace elements; Transport; Uranium; Waste disposal; Waste water; Wetlands; Canada; Eastern Canada; Northwest Territories; Quebec; Western Canada
Coordinates:N451500 N453000 W0740000 W0743000
N620000 N650000 W1100000 W1160000
Record ID:872071-2
Copyright Information:GeoRef, Copyright 2021 American Geosciences Institute. Produced under license from Her Majesty the Queen in Right of Canada, represented by the Minister of Natural Resources
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