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TitleComparison of apparent conductivity to ground displacement and surficial geology for continuous permafrost
AuthorOldenborger, G; Short, N; LeBlanc, A
SourceNear Surface Geoscience Conference & Exhibition 2018, abstract volume; 2018 p. 1-5
Year2018
Alt SeriesNatural Resources Canada, Contribution Series 20180011
PublisherEuropean Association of Geoscientists and Engineers
MeetingNear Surface Geoscience Conference & Exhibition 2018; Porto; PT; September 9-13, 2018
Documentbook
Lang.English
Mediapaper; digital
File formatpdf
ProvinceNunavut
NTS55K/16SW
AreaHudson Bay; Rankin Inlet
Lat/Long WENS -92.4139 -92.3417 62.8722 62.8639
Subjectssurficial geology/geomorphology; engineering geology; geophysics; environmental geology; permafrost; ground ice; geophysical surveys; electrical surveys; conductivity surveys; displacement; radar methods; sediment stability; climate; raised beaches; marine sediments; glacial deposits; tills; moraines; apparent conductivity surveys; permafrost thaw; thaw susceptibility; synthetic aperture radar; climate change; marine nearshore sediments; marine beach sediments; till blanket; moraine ridges; till veneer
Illustrationsgeoscientific sketch maps; plots
ProgramPermafrost, Climate Change Geoscience
ProgramCanada-Nunavut Geoscience Office, Funding Program
Released2018 09 01
Abstract(Summary)
Information on thaw susceptibility is important for predicting the behaviour of permafrost as an engineering substrate. We compare apparent conductivity surveys to ground displacement obtained from differential synthetic aperture radar and surficial geology, with the objective of improving the regional characterization of terrain stability and permafrost conditions along the western coast of Hudson Bay, Nunavut. For certain field conditions, seasonal ground displacement, conductivity, and seasonal conductivity ratio are related to surficial geology, and there is a correspondence between high displacement, low conductivity, and high conductivity ratio, inferred to be indicative of high ice content and thaw-related displacement. For other conditions, results suggest heterogeneity of permafrost conditions, thaw susceptibility and conductivity that are not easily understood in terms of surficial geology alone.
Summary(Plain Language Summary, not published)
Information on thaw susceptibility is important for predicting the behaviour of permafrost as an engineering substrate. We compare apparent conductivity surveys to ground displacement obtained from differential synthetic aperture radar and surficial geology, with the objective of improving the regional characterization of permafrost conditions and terrain stability along the western coast of Hudson Bay, Nunavut. For certain field conditions, seasonal ground displacement, conductivity, and conductivity ratio are related to surficial geology, and there is a correspondence between high displacement, low conductivity, and high conductivity ratio, inferred to be indicative of high ice content and thaw-related displacement. For other conditions, the comparison of conductivity, displacement, and surficial geology is not easily understood, and suggests heterogeneity of permafrost conditions and thaw susceptibility.
GEOSCAN ID308136