Icings and seepage in frozen glaciofluvial deposits, District of Keewatin, N.W.T.
Icings resulting from spring water, presumably flowing through taliks in permanently frozen granular deposits, were observed at four locations within a portion of north-central Keewatin in 1976. Three icings leave remnants persisting throughout the summer. The remnants exhibit morphological and tona...
| Published in: | Canadian Geotechnical Journal |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Canadian Science Publishing
1979
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1139/t79-084 http://www.nrcresearchpress.com/doi/pdf/10.1139/t79-084 |
| Summary: | Icings resulting from spring water, presumably flowing through taliks in permanently frozen granular deposits, were observed at four locations within a portion of north-central Keewatin in 1976. Three icings leave remnants persisting throughout the summer. The remnants exhibit morphological and tonal characteristics that permit their identification on airphotos at a scale of 1:60 000. In this continuous permafrost environment, the presence of taliks acting as sub-permafrost water conduits is suggested by field observations at two of the four locations. At one location spring discharge was observed in February, March, May, and July, unusually high permafrost temperatures were recorded at a depth of 3 m above a suspected talik, and "wet sand," beneath a permafrost cover, was revealed by drilling. |
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