Geophysical identification of permafrost in Livingston Island, Maritime Antarctica
The current permafrost distribution on Livingston Island, South Shetland Islands, maritime Antarctic, was investigated using electrical resistivity tomography, refraction seismics, and shallow borehole temperatures. The field sites include different geological and geomorphological settings, includin...
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ftcarletonunivir:oai:carleton.ca:19167 2023-05-15T13:56:08+02:00 Geophysical identification of permafrost in Livingston Island, Maritime Antarctica Hauck, C. (Christian) Vieira, G. (Gonçalo) Gruber, S. (Stephan) Blanco, J. (Juanjo) Ramos, M. (Miguel) 2007-06-24 https://ir.library.carleton.ca/pub/19167 https://doi.org/10.1029/2006JF000544 en eng https://ir.library.carleton.ca/pub/19167 doi:10.1029/2006JF000544 Journal of Geophysical Research: Earth Surface vol. 112 no. 2 info:eu-repo/semantics/article 2007 ftcarletonunivir https://doi.org/10.1029/2006JF000544 2022-02-06T21:52:01Z The current permafrost distribution on Livingston Island, South Shetland Islands, maritime Antarctic, was investigated using electrical resistivity tomography, refraction seismics, and shallow borehole temperatures. The field sites include different geological and geomorphological settings, including ice cored moraines and bedrock sites with debris covers of different thickness. Two-dimensional geophysical inversion schemes were used to analyze spatial heterogeneity at field sites and to detect isolated occurrences of ground ice. Results confirm that permafrost is widespread on Livingston Island, with high ice content in ice cored moraines and little in the cracks and fissures of frozen bedrock. Specific electrical resistivity values range from 10,000-40,000 ohm-m (frozen unconsolidated material) to 1500- 10,000 ohm-m (frozen quartzite/shale). Combining seismic P wave velocities and specific electrical resistivities, a typical "roof-type" distribution was found with maximum resistivities coinciding with P wave velocities around 3000 m/s and decreasing resistivities for both increasing and decreasing velocities. Copyright 2007 by the American Geophysical Union. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Livingston Island permafrost South Shetland Islands Carleton University's Institutional Repository Antarctic South Shetland Islands Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Journal of Geophysical Research 112 F2 |
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Open Polar |
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Carleton University's Institutional Repository |
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ftcarletonunivir |
language |
English |
description |
The current permafrost distribution on Livingston Island, South Shetland Islands, maritime Antarctic, was investigated using electrical resistivity tomography, refraction seismics, and shallow borehole temperatures. The field sites include different geological and geomorphological settings, including ice cored moraines and bedrock sites with debris covers of different thickness. Two-dimensional geophysical inversion schemes were used to analyze spatial heterogeneity at field sites and to detect isolated occurrences of ground ice. Results confirm that permafrost is widespread on Livingston Island, with high ice content in ice cored moraines and little in the cracks and fissures of frozen bedrock. Specific electrical resistivity values range from 10,000-40,000 ohm-m (frozen unconsolidated material) to 1500- 10,000 ohm-m (frozen quartzite/shale). Combining seismic P wave velocities and specific electrical resistivities, a typical "roof-type" distribution was found with maximum resistivities coinciding with P wave velocities around 3000 m/s and decreasing resistivities for both increasing and decreasing velocities. Copyright 2007 by the American Geophysical Union. |
format |
Article in Journal/Newspaper |
author |
Hauck, C. (Christian) Vieira, G. (Gonçalo) Gruber, S. (Stephan) Blanco, J. (Juanjo) Ramos, M. (Miguel) |
spellingShingle |
Hauck, C. (Christian) Vieira, G. (Gonçalo) Gruber, S. (Stephan) Blanco, J. (Juanjo) Ramos, M. (Miguel) Geophysical identification of permafrost in Livingston Island, Maritime Antarctica |
author_facet |
Hauck, C. (Christian) Vieira, G. (Gonçalo) Gruber, S. (Stephan) Blanco, J. (Juanjo) Ramos, M. (Miguel) |
author_sort |
Hauck, C. (Christian) |
title |
Geophysical identification of permafrost in Livingston Island, Maritime Antarctica |
title_short |
Geophysical identification of permafrost in Livingston Island, Maritime Antarctica |
title_full |
Geophysical identification of permafrost in Livingston Island, Maritime Antarctica |
title_fullStr |
Geophysical identification of permafrost in Livingston Island, Maritime Antarctica |
title_full_unstemmed |
Geophysical identification of permafrost in Livingston Island, Maritime Antarctica |
title_sort |
geophysical identification of permafrost in livingston island, maritime antarctica |
publishDate |
2007 |
url |
https://ir.library.carleton.ca/pub/19167 https://doi.org/10.1029/2006JF000544 |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Antarctic South Shetland Islands Livingston Island |
geographic_facet |
Antarctic South Shetland Islands Livingston Island |
genre |
Antarc* Antarctic Antarctica Ice Livingston Island permafrost South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctica Ice Livingston Island permafrost South Shetland Islands |
op_source |
Journal of Geophysical Research: Earth Surface vol. 112 no. 2 |
op_relation |
https://ir.library.carleton.ca/pub/19167 doi:10.1029/2006JF000544 |
op_doi |
https://doi.org/10.1029/2006JF000544 |
container_title |
Journal of Geophysical Research |
container_volume |
112 |
container_issue |
F2 |
_version_ |
1766263421636968448 |