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TitleResults of a detailed infill lake-sediment survey in the Snow Lake area: evaluation and comparison of grab sample and short core data
DownloadDownload (whole publication)
AuthorFriske, P W B; McCurdy, M W
SourceEXTECH 1: a multidisciplinary approach to massive sulphide research in the Rusty Lake-Snow Lake greenstone belts, Manitoba; by Bonham-Carter, G; Galley, A G (ed.); Hall, G E M (ed.); Geological Survey of Canada, Bulletin 426, 1996 p. 257-277, https://doi.org/10.4095/207590 (Open Access)
Year1996
PublisherNatural Resources Canada
Documentserial
Lang.English
Mediapaper; on-line; digital
RelatedThis publication is contained in Bonham-Carter, G; Galley, A G; Hall, G E M; (1996). EXTECH I: a multidisciplinary approach to massive sulphide research in the Rusty Lake-Snow Lake greenstone belts, Manitoba, Geological Survey of Canada, Bulletin no. 426
File formatpdf
ProvinceManitoba
NTS63J/13; 63K/16
AreaSnow Lake; Wekusko Lake
Lat/Long WENS-100.5000 -99.5000 55.0000 54.7500
Subjectsgeochemistry; grab samples; cores; lake sediment geochemistry; water geochemistry; zinc geochemistry; copper geochemistry; arsenic geochemistry; gold geochemistry; bromine geochemistry; analyses; trace element analyses; geochemical analyses; geochemical surveys
Illustrationssketch maps; analyses
Program1989-1994 Rusty Lake-Snow Lake Mining Camps, Canada-Manitoba Exploration Science and Technology [EXTECXH I] Initiative
ProgramNational Geochemical Reconnaissance Program
Released1996 04 01
AbstractAs part of the Exploration Science and Technology Initiative (EXTECH) program a detailed infill lake-sediment and water survey was undertaken in the Snow Lake area during the fall of 1991. This involved the collection of 346 lake sediment grab samples and concomitant waters. In 1993, additional work was undertaken involving the collection of 23 short cores from selected grab sample sites. The primary objectives of the infill survey and short core work were to: 1) evaluate the effectiveness of lake sediment geochemistry in detecting known mineralization in the Snow Lake area; 2) evaluate and develop new approaches in the use of lake sediment geochemistry; and, 3) define, if possible, new exploration targets.
At most sites, data from the cores verify the original grab sample results. However, at a few sites the original anomalous grab sample results are interpreted as being related to contamination as opposed to naturally elevated levels. An unusually thick sequence of contaminated surface sediments with extremely high concentrations of trace metals is a likely contributing factor, a condition which is restricted to lakes in the immediate vicinity of local anthropogenic activity. Collection of lake cores provides a useful new approach to the follow-up of grab sample data and to the application of lake sediment geochemistry, particularly in areas with significant local contamination.
Much of the known mineralization in the area is clearly reflected by the lake sediment data. Character of the anomalies mirror the composition of the nearby mineralization. The lake sediment data also identify a number of areas that warrant further investigation, several of which are discussed.
GEOSCAN ID207590