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TitleElectrical resistivity surveys for permafrost terrain characterization along the Highway 3 corridor, Yellowknife, Northwest Territories
AuthorOldenborger, G A
SourceGeological Survey of Canada, Open File 7062, 2012, 39 pages; 1 CD-ROM,
Documentopen file
MediaCD-ROM; on-line; digital
File formatreadme
File formatpdf; rtf; shp; txt
ProvinceNorthwest Territories
NTS85J/07; 85J/10; 85J/11
Lat/Long WENS-115.5000 -114.5000 62.7500 62.2500
Subjectssurficial geology/geomorphology; environmental geology; geophysics; permafrost; freezing ground; ground ice; ground temperatures; climate; climate, arctic; climatic fluctuations; thermal regimes; thermal analyses; snow; precipitation; electrical resistivity; geophysical interpretations; geophysical surveys; terrain sensitivity; terrain analysis; climate change
Illustrationslocation maps; photographs; aerial photographs; schematic diagrams; profiles
Natural Resources Canada Library - Ottawa (Earth Sciences)
Natural Resources Canada library - Calgary (Earth Sciences)
Natural Resources Canada library - Vancouver (Earth Sciences)
Geological Survey of Canada (Atlantic)
Natural Resources Canada library - Québec (Earth Sciences)
ProgramBuilding Resilience to Climate Change in Canadian Communities, Climate Change Geoscience
Released2012 04 19
AbstractThis open file reports on recent geophysical data collected and processed by the Geological Survey of Canada as part of the Great Slave Transportation Risk in the Arctic to Climatic Sensitivity activity within the Climate Change Geoscience Program. In late August of 2011, electrical resistivity surveys were performed at selected sites along the Highway 3 corridor, west of Yellowknife. Highway 3 presently suffers from road instabilities including settlement, heave and rotations related to transitions between differing terrain and drainage conditions within discontinuous permafrost. Electrical resistivity data were collected over identified terrain types, and across potential terrain transitions and thaw fronts based on the hypothesis that permafrost distribution and conditions vary with terrain type. Processed resistivity models suggest distinct electrical signatures for most of the terrain types which would allow for extensive geophysical characterization complimentary to landscape mapping, temperature data and shallow boreholes. The resistivity models also exhibit features indicative of the base of ice-bonded permafrost, ice-rich sediment and thaw zones, which can be correlated with terrain features. Observed resistivity anomalies indicate thaw zones related to existing and past road infrastructure, which may help in understanding conditions causing highway subsidence.