Geophysical identification of permafrost in Livingston Island, maritime Antarctica
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....
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.578.8580 2023-05-15T13:31:07+02:00 Geophysical identification of permafrost in Livingston Island, maritime Antarctica Christian Hauck Stephan Gruber Juanjo Blanco Miguel Ramos The Pennsylvania State University CiteSeerX Archives 2007 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.578.8580 http://www.geo.unizh.ch/~stgruber/pubs/Hauck_2007-JGR.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.578.8580 http://www.geo.unizh.ch/~stgruber/pubs/Hauck_2007-JGR.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.geo.unizh.ch/~stgruber/pubs/Hauck_2007-JGR.pdf text 2007 ftciteseerx 2016-01-08T12:53:17Z 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. Text Antarc* Antarctic Antarctica Ice Livingston Island permafrost Unknown Antarctic Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
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Open Polar |
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English |
description |
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. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Christian Hauck Stephan Gruber Juanjo Blanco Miguel Ramos |
spellingShingle |
Christian Hauck Stephan Gruber Juanjo Blanco Miguel Ramos Geophysical identification of permafrost in Livingston Island, maritime Antarctica |
author_facet |
Christian Hauck Stephan Gruber Juanjo Blanco Miguel Ramos |
author_sort |
Christian Hauck |
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 |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.578.8580 http://www.geo.unizh.ch/~stgruber/pubs/Hauck_2007-JGR.pdf |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Antarctic Livingston Island |
geographic_facet |
Antarctic Livingston Island |
genre |
Antarc* Antarctic Antarctica Ice Livingston Island permafrost |
genre_facet |
Antarc* Antarctic Antarctica Ice Livingston Island permafrost |
op_source |
http://www.geo.unizh.ch/~stgruber/pubs/Hauck_2007-JGR.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.578.8580 http://www.geo.unizh.ch/~stgruber/pubs/Hauck_2007-JGR.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766016075419353088 |