Investigations of polygonal patterned ground in continuous Antarctic permafrost by means of ground penetrating radar and electrical resistivity tomography: Some unexpected correlations
Abstract The results of a combined geophysical and geomorphological investigation of thermal‐contraction‐crack polygons near Gondwana station (Germany) in northern Victoria Land (Antarctica) are reported. An area of about 20,000 m 2 characterized by random orthogonal polygons was investigated using...
Published in: | Permafrost and Periglacial Processes |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2022
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1002/ppp.2156 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2156 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ppp.2156 |
id |
crwiley:10.1002/ppp.2156 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1002/ppp.2156 2024-09-15T17:48:04+00:00 Investigations of polygonal patterned ground in continuous Antarctic permafrost by means of ground penetrating radar and electrical resistivity tomography: Some unexpected correlations Forte, Emanuele French, Hugh M. Raffi, Rossana Santin, Ilaria Guglielmin, Mauro 2022 http://dx.doi.org/10.1002/ppp.2156 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2156 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ppp.2156 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Permafrost and Periglacial Processes volume 33, issue 3, page 226-240 ISSN 1045-6740 1099-1530 journal-article 2022 crwiley https://doi.org/10.1002/ppp.2156 2024-07-30T04:22:28Z Abstract The results of a combined geophysical and geomorphological investigation of thermal‐contraction‐crack polygons near Gondwana station (Germany) in northern Victoria Land (Antarctica) are reported. An area of about 20,000 m 2 characterized by random orthogonal polygons was investigated using integrated ground penetrating radar, electrical resistivity tomography, geomorphological surveys, and two trench excavations. The polygons are well developed only at elevations higher than 6–7 m above current sea level on Holocene‐age raised beaches. It is concluded that the polygons are composite in nature because the shallow linear depressions that outline the polygons are underlain by fissures that can contain both sandy gravel and foliated ice (i.e., ice wedges) even in the same polygon network and at distances of just a few meters. Unexpectedly, most of the polygons follow the border of the raised beaches and develop in correspondence with stratigraphic layers dipping toward the sea, imaged by ground penetrating radar (GPR) profiles and interpreted as prograding layers toward the present‐day shoreline. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice permafrost Permafrost and Periglacial Processes Victoria Land wedge* Wiley Online Library Permafrost and Periglacial Processes 33 3 226 240 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract The results of a combined geophysical and geomorphological investigation of thermal‐contraction‐crack polygons near Gondwana station (Germany) in northern Victoria Land (Antarctica) are reported. An area of about 20,000 m 2 characterized by random orthogonal polygons was investigated using integrated ground penetrating radar, electrical resistivity tomography, geomorphological surveys, and two trench excavations. The polygons are well developed only at elevations higher than 6–7 m above current sea level on Holocene‐age raised beaches. It is concluded that the polygons are composite in nature because the shallow linear depressions that outline the polygons are underlain by fissures that can contain both sandy gravel and foliated ice (i.e., ice wedges) even in the same polygon network and at distances of just a few meters. Unexpectedly, most of the polygons follow the border of the raised beaches and develop in correspondence with stratigraphic layers dipping toward the sea, imaged by ground penetrating radar (GPR) profiles and interpreted as prograding layers toward the present‐day shoreline. |
format |
Article in Journal/Newspaper |
author |
Forte, Emanuele French, Hugh M. Raffi, Rossana Santin, Ilaria Guglielmin, Mauro |
spellingShingle |
Forte, Emanuele French, Hugh M. Raffi, Rossana Santin, Ilaria Guglielmin, Mauro Investigations of polygonal patterned ground in continuous Antarctic permafrost by means of ground penetrating radar and electrical resistivity tomography: Some unexpected correlations |
author_facet |
Forte, Emanuele French, Hugh M. Raffi, Rossana Santin, Ilaria Guglielmin, Mauro |
author_sort |
Forte, Emanuele |
title |
Investigations of polygonal patterned ground in continuous Antarctic permafrost by means of ground penetrating radar and electrical resistivity tomography: Some unexpected correlations |
title_short |
Investigations of polygonal patterned ground in continuous Antarctic permafrost by means of ground penetrating radar and electrical resistivity tomography: Some unexpected correlations |
title_full |
Investigations of polygonal patterned ground in continuous Antarctic permafrost by means of ground penetrating radar and electrical resistivity tomography: Some unexpected correlations |
title_fullStr |
Investigations of polygonal patterned ground in continuous Antarctic permafrost by means of ground penetrating radar and electrical resistivity tomography: Some unexpected correlations |
title_full_unstemmed |
Investigations of polygonal patterned ground in continuous Antarctic permafrost by means of ground penetrating radar and electrical resistivity tomography: Some unexpected correlations |
title_sort |
investigations of polygonal patterned ground in continuous antarctic permafrost by means of ground penetrating radar and electrical resistivity tomography: some unexpected correlations |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1002/ppp.2156 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2156 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ppp.2156 |
genre |
Antarc* Antarctic Antarctica Ice permafrost Permafrost and Periglacial Processes Victoria Land wedge* |
genre_facet |
Antarc* Antarctic Antarctica Ice permafrost Permafrost and Periglacial Processes Victoria Land wedge* |
op_source |
Permafrost and Periglacial Processes volume 33, issue 3, page 226-240 ISSN 1045-6740 1099-1530 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ppp.2156 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
33 |
container_issue |
3 |
container_start_page |
226 |
op_container_end_page |
240 |
_version_ |
1810288959824068608 |