La répartition du pergélisol dans la région du détroit de Manitounuk, côte est de la mer d'Hudson, Canada
Forty-four AC electrical resistivity soundings have been made on the Manitounuk Islands (55°30′N, east coast of Hudson Bay) as well as in post-glacial and Recent marine sediments of the supratidal zone along the east shore of Manitounuk Strait. The results indicate that permafrost, which may have a...
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1984
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Online Access: | http://dx.doi.org/10.1139/e84-037 http://www.nrcresearchpress.com/doi/pdf/10.1139/e84-037 |
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crcansciencepubl:10.1139/e84-037 2023-12-17T10:31:24+01:00 La répartition du pergélisol dans la région du détroit de Manitounuk, côte est de la mer d'Hudson, Canada Seguin, Maurice K. Allard, Michel 1984 http://dx.doi.org/10.1139/e84-037 http://www.nrcresearchpress.com/doi/pdf/10.1139/e84-037 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 21, issue 3, page 354-364 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1984 crcansciencepubl https://doi.org/10.1139/e84-037 2023-11-19T13:38:44Z Forty-four AC electrical resistivity soundings have been made on the Manitounuk Islands (55°30′N, east coast of Hudson Bay) as well as in post-glacial and Recent marine sediments of the supratidal zone along the east shore of Manitounuk Strait. The results indicate that permafrost, which may have a thickness of 30 m, is present within basalts and quartzites of the cuestas at elevations above 20 m. The thermal effect of the sea and the possible infiltration of sea water in the structural elements prevent the formation of permafrost at lower altitudes. Rocky sites where permafrost has been detected are windswept areas devoid of snow. Heaved bedrock landforms are numerous on those sites. Along the east coast of Manitounuk Strait permafrost is scattered in patches and the permafrost landforms are degrading. Seasonal freeze–thaw processes are responsible for many features, such as thufurs, boulder heaving, clastic dykes, mud volcanoes, and others. The processes are related to year to year variability in the temperature regime, snow depth over the land surface, groundwater movement, thermal effects of the tides, and shore ice on the tidal flat. Article in Journal/Newspaper Hudson Bay Ice permafrost pergélisol Canadian Science Publishing (via Crossref) Hudson Bay Canada Hudson Manitounuk Islands ENVELOPE(-77.458,-77.458,55.509,55.509) Canadian Journal of Earth Sciences 21 3 354 364 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Seguin, Maurice K. Allard, Michel La répartition du pergélisol dans la région du détroit de Manitounuk, côte est de la mer d'Hudson, Canada |
topic_facet |
General Earth and Planetary Sciences |
description |
Forty-four AC electrical resistivity soundings have been made on the Manitounuk Islands (55°30′N, east coast of Hudson Bay) as well as in post-glacial and Recent marine sediments of the supratidal zone along the east shore of Manitounuk Strait. The results indicate that permafrost, which may have a thickness of 30 m, is present within basalts and quartzites of the cuestas at elevations above 20 m. The thermal effect of the sea and the possible infiltration of sea water in the structural elements prevent the formation of permafrost at lower altitudes. Rocky sites where permafrost has been detected are windswept areas devoid of snow. Heaved bedrock landforms are numerous on those sites. Along the east coast of Manitounuk Strait permafrost is scattered in patches and the permafrost landforms are degrading. Seasonal freeze–thaw processes are responsible for many features, such as thufurs, boulder heaving, clastic dykes, mud volcanoes, and others. The processes are related to year to year variability in the temperature regime, snow depth over the land surface, groundwater movement, thermal effects of the tides, and shore ice on the tidal flat. |
format |
Article in Journal/Newspaper |
author |
Seguin, Maurice K. Allard, Michel |
author_facet |
Seguin, Maurice K. Allard, Michel |
author_sort |
Seguin, Maurice K. |
title |
La répartition du pergélisol dans la région du détroit de Manitounuk, côte est de la mer d'Hudson, Canada |
title_short |
La répartition du pergélisol dans la région du détroit de Manitounuk, côte est de la mer d'Hudson, Canada |
title_full |
La répartition du pergélisol dans la région du détroit de Manitounuk, côte est de la mer d'Hudson, Canada |
title_fullStr |
La répartition du pergélisol dans la région du détroit de Manitounuk, côte est de la mer d'Hudson, Canada |
title_full_unstemmed |
La répartition du pergélisol dans la région du détroit de Manitounuk, côte est de la mer d'Hudson, Canada |
title_sort |
la répartition du pergélisol dans la région du détroit de manitounuk, côte est de la mer d'hudson, canada |
publisher |
Canadian Science Publishing |
publishDate |
1984 |
url |
http://dx.doi.org/10.1139/e84-037 http://www.nrcresearchpress.com/doi/pdf/10.1139/e84-037 |
long_lat |
ENVELOPE(-77.458,-77.458,55.509,55.509) |
geographic |
Hudson Bay Canada Hudson Manitounuk Islands |
geographic_facet |
Hudson Bay Canada Hudson Manitounuk Islands |
genre |
Hudson Bay Ice permafrost pergélisol |
genre_facet |
Hudson Bay Ice permafrost pergélisol |
op_source |
Canadian Journal of Earth Sciences volume 21, issue 3, page 354-364 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e84-037 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
21 |
container_issue |
3 |
container_start_page |
354 |
op_container_end_page |
364 |
_version_ |
1785584696498847744 |