CGRG Bibliography of Canadian Geomorphology
Search Results
Author : Dallimore, S.R.
Date : 1992
Title : Engineering geology of the Richards Island area, N.W.T.
Publication : Canadian Geotechnical Conference Innovation Conservation & Rehabilitation. Proceedings of the 45th Canadian Geotechnical Conference Oct 26-28 1992 1992 Toronto, Ont,
Issue :
Page(s) : 13/1-13/9.
Abstract
Richards Island is underlain by a diverse suite of sediments with variable physical properties such as grain size, salinity, ice content, and geothermal properties. In some areas massive ice may be a major constituent of the near-surface and soils. Four permafrost zones have been identified in the Richards Island area. Zone I, situated in northern Richards Island, is underlain by over 600 m depth of permafrost with mean annual ground surface temperatures about 9C Zone II, situated m central and southern Richards Island is underlain by 300 to 600 m of permafrost with mean annual ground surface temperatures of -77 to -8 C Zone III, situated in the Mackenzie Delta and underlain by relict permafrost, is characterized by 200 to 500 m depth of permafrost with ground surface temperatures of -4 to -6C Zone IV, situated in the Mackenzie Delta, is characterized by less than 100 m depth of permafrost with similar mean annual ground surface temperatures to Zone III. Care must be taken when designing or constructing engineering structures in this area to appraise the in situ geology and permafrost conditions from a regional perspective and a site specific perspective. Ongoing geological processes of concern include, landslides and other forms of natural slope instability, coastal retreat, frost heave and thaw settlement, and fluvial activity.
Bibliography of Canadian Geomorphology