Groundwater chemistry of uranium-thorium-rare earth element deposits, Bancroft area, Ontario

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doi: 10.4095/297779
Authors:Desbarats, A. J.; Percival, J. B.
Source:Open-File Report - Geological Survey of Canada, No.7992, 55p. Publisher: Geological Survey of Canada, Calgary, AB, Canada
Publication Date:2016
Note:In English. 65 refs.
Summary:Small, low-grade, granite-hosted Uranium-Thorium-Rare Earth Element (REE) deposits are found throughout the Grenville geological province in Ontario, Québec and Labrador. Renewed interest in this class of deposit, prompted by spikes in the price of uranium and the search for REE, has raised concerns about potential impacts to groundwater quality from mining activities. In order to inform public debate and regulatory decision making, NRCan scientists have conducted a retrospective investigation of groundwater quality at historical mining sites in the Bancroft area, focusing on metals that may pose health risks. Results of this study show that uranium is highly mobile in shallow groundwater systems and may be present at high concentrations in mine drainage. Natural attenuation processes are not always effective in reducing uranium loading in discharge to downstream surface waters. Thorium and REE are not very mobile in the groundwater environment and occur at concentrations within the range of natural background values.
Subjects:Actinides; Digital data; Environmental analysis; Geochemistry; Ground water; Hydrochemistry; Metal ores; Metals; Pollutants; Pollution; Rare earth deposits; Rare earths; Thorium; Thorium ores; Uranium; Uranium ores; Water quality; Bancroft Ontario; Canada; Canadian Shield; Eastern Canada; Grenville Province; Hastings County Ontario; North America; Ontario; Bancroft Terrane; Southeastern Ontario
Coordinates:N445020 N451040 W0775020 W0782540
Record ID:2017036330
Copyright Information:GeoRef, Copyright 2018 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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