| Title | An assessment of surficial geology, massive ice, and ground ice, Tuktoyaktuk Peninsula, Northwest Territories: application to the proposed Inuvik to Tuktoyaktuk all-weather highway |
| Download | Downloads |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Smith, I R ;
Duong, L |
| Source | Geological Survey of Canada, Open File 7106, 2012, 42 pages, https://doi.org/10.4095/292017  Open Access |
| Links | Metadata - Métadonnées
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| Year | 2012 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is related to Surficial Geology,
Tuktoyaktuk Coastlands, District of Mackenzie, Northwest Territories |
| File format | lisez-moi
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| File format | pdf; rtf; mxd; shp; xml; html; txt |
| Province | Nunavut |
| NTS | 107B/07; 107B/10; 107B/15; 107B/16; 107C/01; 107C/02; 107C/07; 107C/08 |
| Area | Tuktoyaktuk Peninsula; Inuvik; Tuktoyaktuk; Husky Lakes |
| Lat/Long WENS | -134.0000 -132.5000 69.5000 68.2500 |
| Subjects | surficial geology/geomorphology; Nature and Environment; glacial deposits; glacial features; glacial landforms; massive ice; ground ice; glacial history; tills; permafrost; lithostratigraphy; pingos;
construction suitabilities; lithology; slumps; slump structures |
| Illustrations | location maps; plots |
| Program | Climate Change Geoscience |
| Program | GEM: Geo-mapping for Energy and Minerals Sverdrup Sedimentary Basin |
| Released | 2012 11 01 |
| Abstract | This report utilizes seismic shothole drillers' lithostratigraphic logs as a basis for contrasting previously published maps and reports of surficial geology, massive ice and ground ice, on the
Tuktoyaktuk Peninsula, Northwest Territories. Areas of glaciofluvial ice-contact and outwash deposits, and lacustrine sediments in thermokarst terrain are demonstrated to be less extensive, while areas of till cover are more widespread. Approximately
2% of all shotholes contain records of massive ice, it is most abundant between 4 and 14 m depth, and principally is situated at lithostratigraphic contacts (73%). On the Tuktoyaktuk Peninsula, half (52%) of the massive ice records occur in areas of
surface till cover, and it is largely underlain by "sorted + sorted, fine" deposits (72%). Significant spatial, lithostratigraphic, and thickness differences are noted in other physiographic regions. Shothole ground ice records are more common (13%
of all such records), particularly within the 15 km buffer area surrounding the proposed Inuvik to Tuktoyaktuk Highway (18.4%), although it is acknowledged that many such records may relate to massive ice deposits, and that drillers typically
under-report ground ice occurrence. There is significant disagreement between shothole-based massive ice and ground ice occurrences with existing permafrost and ground ice maps that were constructed on the basis of surficial geology-related ground
ice associations. Changes in surficial geology classification account for part, elsewhere, ground ice is simply found to be more abundant in different deposit types than previously surmised.
It is argued that integration of abundant shothole
lithostratigraphic data provides a more reliable reconstruction of surficial geology, massive ice, and ground ice conditions in the Tuktoyaktuk Peninsula. The data and syntheses presented can better inform engineering and landscape stability
assessments, and similarly identify areas wherein more detailed field-surveys and inspection are likely required as part of an infrastructure development proposal. |
| GEOSCAN ID | 292017 |
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