| Title | Electrical resistivity surveys for permafrost terrain characterization along the Highway 3 corridor, Yellowknife, Northwest Territories |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Oldenborger, G A |
| Source | Geological Survey of Canada, Open File 7062, 2012, 39 pages; 1 CD-ROM, https://doi.org/10.4095/291335  Open Access |
| Year | 2012 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | CD-ROM; on-line; digital |
| File format | readme
|
| File format | pdf; rtf; shp; txt |
| Province | Northwest Territories |
| NTS | 85J/07; 85J/10; 85J/11 |
| Area | Yellowknife |
| Lat/Long WENS | -115.5000 -114.5000 62.7500 62.2500 |
| Subjects | surficial geology/geomorphology; environmental geology; geophysics; Nature and Environment; 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 |
| Illustrations | location maps; photographs; aerial photographs; schematic diagrams; profiles |
| Program | Climate Change Geoscience |
| Released | 2012 04 19 |
| Abstract | This 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. |
| GEOSCAN ID | 291335 |
|
|