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TitleMineralogical investigation of sediments from a mercury-contaminated lake in northwestern Ontario
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorPercival, J BORCID logo; Drouin-Brisebois, I; Lockhart, W L
SourceCanadian Shield/Bouclier canadien; by Geological Survey of Canada; Geological Survey of Canada, Current Research no. 1999-C, 1999 p. 233-240, Open Access logo Open Access
PublisherNatural Resources Canada
Mediapaper; on-line; digital
RelatedThis publication is contained in Canadian Shield
File formatpdf
NTS52K/03SW; 52K/04SE
AreaClay Lake
Lat/Long WENS-93.7500 -93.2500 50.1167 50.0000
Subjectsmineralogy; geochemistry; cinnabar; sediments; cores; mercury geochemistry; mineralogical analyses; lake sediment geochemistry; x-ray diffraction; chemical analysis; Precambrian
Illustrationssketch maps; photomicrographs; analyses
Released1999 02 01
AbstractThe form of inorganic mercury in a highly contaminated river-lake system in northwestern Ontario was investigated using routine X-ray powder diffraction analyses and scanning electron microscopy. Evidence for the occurrence of authigenic cinnabar in the peak contaminated zone is shown. The presence of a mercuric sulphide mineral indicates anoxic conditions with depth, limits methylation of mercury in the lake sediment, and accounts for the progressive burial history of contaminated sediments.

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