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Title	Arsenic in surface waters, Cobalt, Ontario
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Licence	Please note the adoption of the Open Government Licence - Canada supersedes any previous licences.
Author	Percival, J B; Dumaresq, C G; Kwong, Y T J; Hendry, K B; Michel, F A
Source	Canadian Shield/Bouclier canadien; by Geological Survey of Canada; Geological Survey of Canada, Current Research no. 1996-C, 1996 p. 137-146, https://doi.org/10.4095/207451 Open Access
Year	1996
Publisher	Natural Resources Canada
Document	serial
Lang.	English
Media	paper; on-line; digital
Related	This publication is contained in Canadian Shield
File format	pdf
Province	Ontario
NTS	31M/05
Area	Cobalt; Farr Creek drainage basin
Lat/Long WENS	-80.0000 -79.5000 47.5000 47.2500
Subjects	environmental geology; geochemistry; surface waters; arsenic geochemistry; mine waste products; environmental impacts; water quality; groundwater geochemistry; cobalt geochemistry; nickel geochemistry
Illustrations	sketch maps; analyses
Released	1996 02 01
Abstract	Water samples from the Farr Creek drainage basin, Cobalt, Ontario, were collected to study the aqueous transport of As and other metals in a weakly alkaline environment. New data on downstream changes in total As, As(III), and As(V) concentrations are presented. Temporal (1991-1995) changes in aqueous As distribution in the study area are also examined. Total dissolved As concentrations in surface waters range from 11 to 20 000 micro-g/L. Arsenic concentration generally decreases downstream, especially through wetlands, and appears to decrease with time. Widespread mine waste is undoubtedly the primary source of As in surface waters, but natural background levels in groundwater may also contribute and need to be assessed. Without mitigation, however, exposed tailings and waste rock will continue to release significant amounts of As and associated trace elements to the drainage system.
GEOSCAN ID	207451