Title | Regional gravity survey of western Great Slave Lake, Northwest Territories: a GSC contribution to the SNORCLE transect |
Download | Download (whole publication) |
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Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
Author | Lowe, C; Seemann, D A |
Source | Canadian Shield/Bouclier canadien; by Geological Survey of Canada; Geological Survey of Canada, Current Research no. 1996-C, 1996 p. 29-35, https://doi.org/10.4095/207441 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
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File format | pdf |
Province | Northwest Territories |
NTS | 85G/01; 85G/02; 85G/03; 85G/04; 85G/05; 85G/06; 85G/07; 85G/08; 85G/09; 85G/10; 85G/11; 85F/01 |
Area | Great Slave Lake |
Lat/Long WENS | -116.5000 -114.0000 61.7500 61.0000 |
Subjects | geophysics; gravity surveys; gravity surveys, ground; bouguer anomalies; geophysical surveys; structural features; gravity anomalies; Precambrian |
Illustrations | sketch maps |
Program | Lithoprobe |
Released | 1996 02 01 |
Abstract | In 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. |
GEOSCAN ID | 207441 |
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