Surficial materials and related ground ice conditions, Slave Province, N.W.T., Canada
Surficial mapping and geologic information on the nature and evolution of surficial materials in the Slave geologic province indicate that the geotechnical properties and potential ground ice contents associated with these materials depend largely upon their provenance, depositional conditions, and...
Published in: | Canadian Journal of Earth Sciences |
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Canadian Science Publishing
1999
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Online Access: | http://dx.doi.org/10.1139/e98-087 http://www.nrcresearchpress.com/doi/pdf/10.1139/e98-087 |
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crcansciencepubl:10.1139/e98-087 2024-05-19T07:35:52+00:00 Surficial materials and related ground ice conditions, Slave Province, N.W.T., Canada Dredge, Lynda A Kerr, Daniel E Wolfe, Stephen A 1999 http://dx.doi.org/10.1139/e98-087 http://www.nrcresearchpress.com/doi/pdf/10.1139/e98-087 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 36, issue 7, page 1227-1238 ISSN 0008-4077 1480-3313 journal-article 1999 crcansciencepubl https://doi.org/10.1139/e98-087 2024-05-02T06:51:27Z Surficial mapping and geologic information on the nature and evolution of surficial materials in the Slave geologic province indicate that the geotechnical properties and potential ground ice contents associated with these materials depend largely upon their provenance, depositional conditions, and the postglacial climatic history. This information may be used to provide a regional-scale view of the distribution of ground ice conditions and terrain sensitivities associated with various surficial materials. In till veneers and blankets, ground ice content is generally low, as suggested by lack of thermokarst and other permafrost features. However, distinctive surface relief in hummocky till including kettle depressions, rim-ridges, and shallow thaw flowslides may be attributed to massive ice, resulting in sensitive till terrain. Although many outwash sediments have low ice contents near the surface, massive ice ranging from 5 to 10 m thick is present in some eskers and ice-contact outwash sediments. These are associated with thermokarst, slope movement, and collapse features, indicative of meltout or creep of large bodies of massive ice. The terrain sensitivity associated with these deposits is typically low to moderate, due to the coarse-grained nature of the sediments. In contrast, terrain sensitivity is high, and active-layer detachment slides are common along the Coronation Gulf coast where frozen silty clay marine sediments contain a wide range of ice contents. Results from this study may be applied to a much more extensive area of the glaciated western Arctic mainland and adjacent Arctic coastal plain in which materials with a similar glacial history are found. Article in Journal/Newspaper Arctic Coronation Gulf Ice permafrost Thermokarst Canadian Science Publishing Canadian Journal of Earth Sciences 36 7 1227 1238 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Surficial mapping and geologic information on the nature and evolution of surficial materials in the Slave geologic province indicate that the geotechnical properties and potential ground ice contents associated with these materials depend largely upon their provenance, depositional conditions, and the postglacial climatic history. This information may be used to provide a regional-scale view of the distribution of ground ice conditions and terrain sensitivities associated with various surficial materials. In till veneers and blankets, ground ice content is generally low, as suggested by lack of thermokarst and other permafrost features. However, distinctive surface relief in hummocky till including kettle depressions, rim-ridges, and shallow thaw flowslides may be attributed to massive ice, resulting in sensitive till terrain. Although many outwash sediments have low ice contents near the surface, massive ice ranging from 5 to 10 m thick is present in some eskers and ice-contact outwash sediments. These are associated with thermokarst, slope movement, and collapse features, indicative of meltout or creep of large bodies of massive ice. The terrain sensitivity associated with these deposits is typically low to moderate, due to the coarse-grained nature of the sediments. In contrast, terrain sensitivity is high, and active-layer detachment slides are common along the Coronation Gulf coast where frozen silty clay marine sediments contain a wide range of ice contents. Results from this study may be applied to a much more extensive area of the glaciated western Arctic mainland and adjacent Arctic coastal plain in which materials with a similar glacial history are found. |
format |
Article in Journal/Newspaper |
author |
Dredge, Lynda A Kerr, Daniel E Wolfe, Stephen A |
spellingShingle |
Dredge, Lynda A Kerr, Daniel E Wolfe, Stephen A Surficial materials and related ground ice conditions, Slave Province, N.W.T., Canada |
author_facet |
Dredge, Lynda A Kerr, Daniel E Wolfe, Stephen A |
author_sort |
Dredge, Lynda A |
title |
Surficial materials and related ground ice conditions, Slave Province, N.W.T., Canada |
title_short |
Surficial materials and related ground ice conditions, Slave Province, N.W.T., Canada |
title_full |
Surficial materials and related ground ice conditions, Slave Province, N.W.T., Canada |
title_fullStr |
Surficial materials and related ground ice conditions, Slave Province, N.W.T., Canada |
title_full_unstemmed |
Surficial materials and related ground ice conditions, Slave Province, N.W.T., Canada |
title_sort |
surficial materials and related ground ice conditions, slave province, n.w.t., canada |
publisher |
Canadian Science Publishing |
publishDate |
1999 |
url |
http://dx.doi.org/10.1139/e98-087 http://www.nrcresearchpress.com/doi/pdf/10.1139/e98-087 |
genre |
Arctic Coronation Gulf Ice permafrost Thermokarst |
genre_facet |
Arctic Coronation Gulf Ice permafrost Thermokarst |
op_source |
Canadian Journal of Earth Sciences volume 36, issue 7, page 1227-1238 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e98-087 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
36 |
container_issue |
7 |
container_start_page |
1227 |
op_container_end_page |
1238 |
_version_ |
1799474900505722880 |