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Deep‐seated creep of massive ground ice, Tuktoyaktuk, NWT, Canada
Author(s) -
Dallimore S. R.,
Nixon F. M.,
Egginton P. A.,
Bisson J. G.
Publication year - 1996
Publication title -
permafrost and periglacial processes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.867
H-Index - 76
eISSN - 1099-1530
pISSN - 1045-6740
DOI - 10.1002/(sici)1099-1530(199610)7:4<337::aid-ppp232>3.0.co;2-3
Subject(s) - creep , geology , permafrost , geotechnical engineering , geomorphology , deformation (meteorology) , oceanography , composite material , materials science
A study of the in situ creep deformation of massive ground ice has been carried out at a field site near the village of Tuktoyaktuk, NWT. Cumulative surface displacements, accounted for by creep deformation to a depth of 25 m, vary from about 3 mm/a at the upslope site to 4 mm/a at the downslope site. While net displacements on a year to year basis were downslope, the creep pattern at both sites displays a quasi‐sinusoidal fluctuation, with significant seasonal upslope movement during the late winter and early summer. This fluctuation is thought to be due to the effects of thermal contraction. © 1996 John Wiley & Sons, Ltd.