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TitleRegional gravity survey of western Great Slave Lake, Northwest Territories: a GSC contribution to the SNORCLE transect
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorLowe, C; Seemann, D A
SourceCanadian Shield/Bouclier canadien; by Geological Survey of Canada; Geological Survey of Canada, Current Research no. 1996-C, 1996 p. 29-35, Open Access logo Open Access
PublisherNatural Resources Canada
Mediapaper; on-line; digital
RelatedThis publication is contained in Canadian Shield
File formatpdf
ProvinceNorthwest Territories
NTS85G/01; 85G/02; 85G/03; 85G/04; 85G/05; 85G/06; 85G/07; 85G/08; 85G/09; 85G/10; 85G/11; 85F/01
AreaGreat Slave Lake
Lat/Long WENS-116.5000 -114.0000 61.7500 61.0000
Subjectsgeophysics; gravity surveys; gravity surveys, ground; bouguer anomalies; geophysical surveys; structural features; gravity anomalies; Precambrian
Illustrationssketch maps
Released1996 02 01
AbstractIn March 1995, 117 new gravity measurements were obtained at an average spacing of 8.5km on the frozen surface of western Great Slave Lake. The measurements were acquired using a LaCoste and Romberg gravimeter, which was operated in damped mode to overcome oscillations of the lake ice. Station co-ordinates were computed using differential GPS. Water level gauge measurements, tied to local benchmark networks, were used to determine station elevations. Simple Bouguer anomalies, considered accurate to ± 0.4 mGal, have been computed for all stations.
Western Great Slave Lake is underlain by Paleozoic cover rocks of the Western Canada Sedimentary Basin. The structure of the Precambrian basement beneath this cover is conjectural, extrapolated largely on the basis of magnetic anomaly data from surrounding regions. A preliminary analysis of the new gravity data reveals distinct anomalies and suggests the basement structure may be more complex than previously inferred.

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