Three‐dimensional investigation of an open‐ and a closed‐system Pingo in northwestern Canada
Abstract The present study presents three‐dimensional investigations of a hydrostatic pingo in the Mackenzie Delta region and a hydraulic pingo in the Ogilvie Mountains and contributes to a better understanding about the internal structures of the two pingo types. A combined approach using quasi‐thr...
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crwiley:10.1002/ppp.2115 2024-06-09T07:45:27+00:00 Three‐dimensional investigation of an open‐ and a closed‐system Pingo in northwestern Canada Kunz, Julius Kneisel, Christof Deutsche Forschungsgemeinschaft 2021 http://dx.doi.org/10.1002/ppp.2115 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2115 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ppp.2115 en eng Wiley http://creativecommons.org/licenses/by-nc-nd/4.0/ Permafrost and Periglacial Processes volume 32, issue 4, page 541-557 ISSN 1045-6740 1099-1530 journal-article 2021 crwiley https://doi.org/10.1002/ppp.2115 2024-05-16T14:27:02Z Abstract The present study presents three‐dimensional investigations of a hydrostatic pingo in the Mackenzie Delta region and a hydraulic pingo in the Ogilvie Mountains and contributes to a better understanding about the internal structures of the two pingo types. A combined approach using quasi‐three‐dimensional electrical resistivity tomography, ground‐penetrating radar and frost probing allowed a clear delineation of frozen and unfrozen areas in the subsurface. At the hydrostatic pingo a massive ice core as well as a surrounding talik could be detected, but the location of the ice core and the talik differs from previous published assumptions. In contrast to acknowledged theory, at our site the massive ice core is not located in the center of the pingo but at the western edge, whereas the eastern flank is underlain by a talik, which surrounds the massive ice core. At the hydraulic pingo, the expected internal structure could be confirmed and the pathway of upwelling water could also be detected. The combined approach of the applied methods represents the first known three‐dimensional geoelectrical investigation of pingos and provides new insights into the internal structure and architecture of the two different pingo types. The chosen approach allows further conclusions on the formation of these permafrost‐affected landforms. Article in Journal/Newspaper closed system Pingo Ice ice core Mackenzie Delta Ogilvie Mountains permafrost Permafrost and Periglacial Processes Wiley Online Library Canada Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) Ogilvie ENVELOPE(-139.746,-139.746,63.563,63.563) Ogilvie Mountains ENVELOPE(-138.254,-138.254,64.583,64.583) Talik ENVELOPE(146.601,146.601,59.667,59.667) Permafrost and Periglacial Processes |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract The present study presents three‐dimensional investigations of a hydrostatic pingo in the Mackenzie Delta region and a hydraulic pingo in the Ogilvie Mountains and contributes to a better understanding about the internal structures of the two pingo types. A combined approach using quasi‐three‐dimensional electrical resistivity tomography, ground‐penetrating radar and frost probing allowed a clear delineation of frozen and unfrozen areas in the subsurface. At the hydrostatic pingo a massive ice core as well as a surrounding talik could be detected, but the location of the ice core and the talik differs from previous published assumptions. In contrast to acknowledged theory, at our site the massive ice core is not located in the center of the pingo but at the western edge, whereas the eastern flank is underlain by a talik, which surrounds the massive ice core. At the hydraulic pingo, the expected internal structure could be confirmed and the pathway of upwelling water could also be detected. The combined approach of the applied methods represents the first known three‐dimensional geoelectrical investigation of pingos and provides new insights into the internal structure and architecture of the two different pingo types. The chosen approach allows further conclusions on the formation of these permafrost‐affected landforms. |
author2 |
Deutsche Forschungsgemeinschaft |
format |
Article in Journal/Newspaper |
author |
Kunz, Julius Kneisel, Christof |
spellingShingle |
Kunz, Julius Kneisel, Christof Three‐dimensional investigation of an open‐ and a closed‐system Pingo in northwestern Canada |
author_facet |
Kunz, Julius Kneisel, Christof |
author_sort |
Kunz, Julius |
title |
Three‐dimensional investigation of an open‐ and a closed‐system Pingo in northwestern Canada |
title_short |
Three‐dimensional investigation of an open‐ and a closed‐system Pingo in northwestern Canada |
title_full |
Three‐dimensional investigation of an open‐ and a closed‐system Pingo in northwestern Canada |
title_fullStr |
Three‐dimensional investigation of an open‐ and a closed‐system Pingo in northwestern Canada |
title_full_unstemmed |
Three‐dimensional investigation of an open‐ and a closed‐system Pingo in northwestern Canada |
title_sort |
three‐dimensional investigation of an open‐ and a closed‐system pingo in northwestern canada |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1002/ppp.2115 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2115 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ppp.2115 |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) ENVELOPE(-139.746,-139.746,63.563,63.563) ENVELOPE(-138.254,-138.254,64.583,64.583) ENVELOPE(146.601,146.601,59.667,59.667) |
geographic |
Canada Mackenzie Delta Ogilvie Ogilvie Mountains Talik |
geographic_facet |
Canada Mackenzie Delta Ogilvie Ogilvie Mountains Talik |
genre |
closed system Pingo Ice ice core Mackenzie Delta Ogilvie Mountains permafrost Permafrost and Periglacial Processes |
genre_facet |
closed system Pingo Ice ice core Mackenzie Delta Ogilvie Mountains permafrost Permafrost and Periglacial Processes |
op_source |
Permafrost and Periglacial Processes volume 32, issue 4, page 541-557 ISSN 1045-6740 1099-1530 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1002/ppp.2115 |
container_title |
Permafrost and Periglacial Processes |
_version_ |
1801374814267506688 |