Mapping ice-bonded permafrost with electrical methods in Sisimiut, West Greenland
Permafrost delineation and thickness determination is of great importance in engineering related projects in arctic areas. In this paper, 2D geoelectrical measurements are applied and evaluated for permafrost mapping in an area in West Greenland. Multi-electrode resistivity profiles (MEP) have been...
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ftdtupubl:oai:pure.atira.dk:publications/490f94c6-2e6c-4b8e-acce-5780f3613233 2024-05-19T07:36:06+00:00 Mapping ice-bonded permafrost with electrical methods in Sisimiut, West Greenland Ingeman-Nielsen, Thomas 2006 https://orbit.dtu.dk/en/publications/490f94c6-2e6c-4b8e-acce-5780f3613233 eng eng EAGE Publications BV https://orbit.dtu.dk/en/publications/490f94c6-2e6c-4b8e-acce-5780f3613233 urn:ISBN:90-73781-62-0 info:eu-repo/semantics/restrictedAccess Ingeman-Nielsen , T 2006 , Mapping ice-bonded permafrost with electrical methods in Sisimiut, West Greenland . in Near Surface 2006 : Extended Abstracts . EAGE Publications BV , 12th European Meeting of Environmental and Engineering Geophysics , Helsinki , Finland , 04/09/2006 . contributionToPeriodical 2006 ftdtupubl 2024-05-01T00:13:55Z Permafrost delineation and thickness determination is of great importance in engineering related projects in arctic areas. In this paper, 2D geoelectrical measurements are applied and evaluated for permafrost mapping in an area in West Greenland. Multi-electrode resistivity profiles (MEP) have been collected and are compared with borehole information. It is shown that the permafrost thickness in this case is grossly overestimated by a factor of two to three. The difference between the inverted 2D resistivity sections and the borehole information is explained by macro-anisotropy due to the presence of horizontal ice-lenses in the frozen clay deposits. It is concluded that where the resistivity method perform well for lateral permafrost mapping, great care should be taken in evaluating permafrost thickness based on 2D resistivity profiles alone. Additional information from boreholes or other geophysical techniques is needed for correct interpretation. Article in Journal/Newspaper Arctic Greenland Ice permafrost Sisimiut Technical University of Denmark: DTU Orbit |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
description |
Permafrost delineation and thickness determination is of great importance in engineering related projects in arctic areas. In this paper, 2D geoelectrical measurements are applied and evaluated for permafrost mapping in an area in West Greenland. Multi-electrode resistivity profiles (MEP) have been collected and are compared with borehole information. It is shown that the permafrost thickness in this case is grossly overestimated by a factor of two to three. The difference between the inverted 2D resistivity sections and the borehole information is explained by macro-anisotropy due to the presence of horizontal ice-lenses in the frozen clay deposits. It is concluded that where the resistivity method perform well for lateral permafrost mapping, great care should be taken in evaluating permafrost thickness based on 2D resistivity profiles alone. Additional information from boreholes or other geophysical techniques is needed for correct interpretation. |
format |
Article in Journal/Newspaper |
author |
Ingeman-Nielsen, Thomas |
spellingShingle |
Ingeman-Nielsen, Thomas Mapping ice-bonded permafrost with electrical methods in Sisimiut, West Greenland |
author_facet |
Ingeman-Nielsen, Thomas |
author_sort |
Ingeman-Nielsen, Thomas |
title |
Mapping ice-bonded permafrost with electrical methods in Sisimiut, West Greenland |
title_short |
Mapping ice-bonded permafrost with electrical methods in Sisimiut, West Greenland |
title_full |
Mapping ice-bonded permafrost with electrical methods in Sisimiut, West Greenland |
title_fullStr |
Mapping ice-bonded permafrost with electrical methods in Sisimiut, West Greenland |
title_full_unstemmed |
Mapping ice-bonded permafrost with electrical methods in Sisimiut, West Greenland |
title_sort |
mapping ice-bonded permafrost with electrical methods in sisimiut, west greenland |
publisher |
EAGE Publications BV |
publishDate |
2006 |
url |
https://orbit.dtu.dk/en/publications/490f94c6-2e6c-4b8e-acce-5780f3613233 |
genre |
Arctic Greenland Ice permafrost Sisimiut |
genre_facet |
Arctic Greenland Ice permafrost Sisimiut |
op_source |
Ingeman-Nielsen , T 2006 , Mapping ice-bonded permafrost with electrical methods in Sisimiut, West Greenland . in Near Surface 2006 : Extended Abstracts . EAGE Publications BV , 12th European Meeting of Environmental and Engineering Geophysics , Helsinki , Finland , 04/09/2006 . |
op_relation |
https://orbit.dtu.dk/en/publications/490f94c6-2e6c-4b8e-acce-5780f3613233 urn:ISBN:90-73781-62-0 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1799475144172765184 |