|Title||Environmental geoscience investigations surrounding the former Aldermac mine, Abitibi, Quebec: Regional surveys of surface water and sediment geochemistry|
|Author||McNeil, R J; Alpay, S; Grenier, A|
|Source||Geological Survey of Canada, Open File 7595, 2015, 24 pages, https://doi.org/10.4095/296832 (Open Access)|
|Publisher||Natural Resources Canada|
|Related||This publication is related to Alpay, S; Grenier, A; McNeil,
R J; Carisse, M; Kerry, M; (2016). Environmental geoscience investigations surrounding the former Aldermac mine, Abitibi, Quebec: gravity corer modifications to allow sediment sampling and preservation of core integrity, Geological Survey of Canada,
Open File 8060|
|File format||xlsx; pdf; kmz; rtf|
|Lat/Long WENS|| -79.5000 -79.0000 48.5000 48.0000|
|Subjects||stream sediment geochemistry; stream water geochemistry; copper geochemistry; zinc geochemistry; gold geochemistry; silver geochemistry; lake sediment geochemistry; geochemical analyses; lake water
geochemistry; cores; trace metals; Aldermac Mine; Abitibi greenstone belt|
|Illustrations||location maps; tables; photographs; schematic diagrams|
|Program||Tools for environmental impacts and adaptation for metal mining, Environmental Geoscience|
|Released||2015 07 24|
Geoscience investigations are fundamental for environmental risk assessment of metal mining. This Geological Survey of Canada Open File presents regional geochemical surveys of
surface water and sediments from lakes and streams collected during 2011-13. The data form the basis to identify environmental metal contamination in the vicinity of the former Aldermac mine site (Cu, Zn, Au and Ag) in Abitibi, Quebec, in addition to
tracking potential recovery of aquatic systems.
Current practices for baseline studies of sites to be developed for mining include temporal surface water sampling and surface grab sampling of sediments in aquatic receiving environments. In
addition to surface sediment sampling, vertical sediment coring is a universal tool of paleolimnological research. This report presents data from surface water, sediment grab sampling and sediment coring in the vicinity of the Aldermac site.
former Aldermac mine (Cu, Zn, Au and Ag), 25 km west of Rouyn-Noranda in Abitibi, Quebec, operated from 1932-1943 and discharged acid mine drainage to the watershed downstream which includes Lac Arnoux and Lac Dasserat (Figure 1). The study site is
representative of both a common mineral deposit and the legacy of historical mining practices in the area (Goulet and Couillard, 2009). Contamination and adverse effects on aquatic habitats were demonstrated to the point at which the Government of
Quebec led an environmental restoration of the Aldermac property in 2008-11. Given current active exploration, further mining development within the watershed is foreseeable.
|Summary||(Plain Language Summary, not published)|
Geoscience investigations are fundamental for environmental risk assessment of metal mining. This Geological Survey of Canada Open File presents
geochemical data from regional surveys of surface water and sediment from streams and lakes collected during 2011-13. The data form the basis to evaluate metal contamination emanating from the former Aldermac mine (Cu, Zn, Au and Ag) in Abitibi,
Quebec, and potential recovery since environmental restoration of the property (2008-11). The samples are comprised of 33 surface lake sediments, 32 lake sediment cores, 11 stream sediments and 44 surface waters in a 400 km2 area. These data will
ultimately be used to determine the extent of contamination, trace contaminant sources, and estimate natural background metal concentrations. They also provide evidence for a comparison of different sampling and analytical techniques to optimize
geoscience tools for environmental risk assessment.