Arctic megaslide at presumed rest
Slope failure like in the Hinlopen/Yermak Megaslide is one of the major geohazards in a changing Arctic environment. We analysed hydroacoustic and 2D high-resolution seismic data from the apparently intact continental slope immediately north of the Hinlopen/Yermak Megaslide for signs of past and fut...
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2016
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Online Access: | https://pure.au.dk/portal/en/publications/81c17797-ee27-4903-9ef1-88218e2459f4 https://doi.org/10.1038/srep38529 http://www.scopus.com/inward/record.url?scp=85002680028&partnerID=8YFLogxK |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/81c17797-ee27-4903-9ef1-88218e2459f4 2024-02-04T09:56:32+01:00 Arctic megaslide at presumed rest Geissler, Wolfram H. Gebhardt, A. Catalina Gross, Felix Wollenburg, Jutta Jensen, Laura Schmidt-Aursch, Mechita C. Krastel, Sebastian Elger, Judith Osti, Giacomo 2016-12-06 https://pure.au.dk/portal/en/publications/81c17797-ee27-4903-9ef1-88218e2459f4 https://doi.org/10.1038/srep38529 http://www.scopus.com/inward/record.url?scp=85002680028&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/en/publications/81c17797-ee27-4903-9ef1-88218e2459f4 info:eu-repo/semantics/openAccess Geissler , W H , Gebhardt , A C , Gross , F , Wollenburg , J , Jensen , L , Schmidt-Aursch , M C , Krastel , S , Elger , J & Osti , G 2016 , ' Arctic megaslide at presumed rest ' , Scientific Reports , vol. 6 , 38529 . https://doi.org/10.1038/srep38529 article 2016 ftuniaarhuspubl https://doi.org/10.1038/srep38529 2024-01-11T00:03:30Z Slope failure like in the Hinlopen/Yermak Megaslide is one of the major geohazards in a changing Arctic environment. We analysed hydroacoustic and 2D high-resolution seismic data from the apparently intact continental slope immediately north of the Hinlopen/Yermak Megaslide for signs of past and future instabilities. Our new bathymetry and seismic data show clear evidence for incipient slope instability. Minor slide deposits and an internally-deformed sedimentary layer near the base of the gas hydrate stability zone imply an incomplete failure event, most probably about 30000 years ago, contemporaneous to or shortly after the Hinlopen/Yermak Megaslide. An active gas reservoir at the base of the gas hydrate stability zone demonstrate that over-pressured fluids might have played a key role in the initiation of slope failure at the studied slope, but more importantly also for the giant HYM slope failure. To date, it is not clear, if the studied slope is fully preconditioned to fail completely in future or if it might be slowly deforming and creeping at present. We detected widespread methane seepage on the adjacent shallow shelf areas not sealed by gas hydrates. Article in Journal/Newspaper Arctic Arctic Aarhus University: Research Arctic Scientific Reports 6 1 |
institution |
Open Polar |
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Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
description |
Slope failure like in the Hinlopen/Yermak Megaslide is one of the major geohazards in a changing Arctic environment. We analysed hydroacoustic and 2D high-resolution seismic data from the apparently intact continental slope immediately north of the Hinlopen/Yermak Megaslide for signs of past and future instabilities. Our new bathymetry and seismic data show clear evidence for incipient slope instability. Minor slide deposits and an internally-deformed sedimentary layer near the base of the gas hydrate stability zone imply an incomplete failure event, most probably about 30000 years ago, contemporaneous to or shortly after the Hinlopen/Yermak Megaslide. An active gas reservoir at the base of the gas hydrate stability zone demonstrate that over-pressured fluids might have played a key role in the initiation of slope failure at the studied slope, but more importantly also for the giant HYM slope failure. To date, it is not clear, if the studied slope is fully preconditioned to fail completely in future or if it might be slowly deforming and creeping at present. We detected widespread methane seepage on the adjacent shallow shelf areas not sealed by gas hydrates. |
format |
Article in Journal/Newspaper |
author |
Geissler, Wolfram H. Gebhardt, A. Catalina Gross, Felix Wollenburg, Jutta Jensen, Laura Schmidt-Aursch, Mechita C. Krastel, Sebastian Elger, Judith Osti, Giacomo |
spellingShingle |
Geissler, Wolfram H. Gebhardt, A. Catalina Gross, Felix Wollenburg, Jutta Jensen, Laura Schmidt-Aursch, Mechita C. Krastel, Sebastian Elger, Judith Osti, Giacomo Arctic megaslide at presumed rest |
author_facet |
Geissler, Wolfram H. Gebhardt, A. Catalina Gross, Felix Wollenburg, Jutta Jensen, Laura Schmidt-Aursch, Mechita C. Krastel, Sebastian Elger, Judith Osti, Giacomo |
author_sort |
Geissler, Wolfram H. |
title |
Arctic megaslide at presumed rest |
title_short |
Arctic megaslide at presumed rest |
title_full |
Arctic megaslide at presumed rest |
title_fullStr |
Arctic megaslide at presumed rest |
title_full_unstemmed |
Arctic megaslide at presumed rest |
title_sort |
arctic megaslide at presumed rest |
publishDate |
2016 |
url |
https://pure.au.dk/portal/en/publications/81c17797-ee27-4903-9ef1-88218e2459f4 https://doi.org/10.1038/srep38529 http://www.scopus.com/inward/record.url?scp=85002680028&partnerID=8YFLogxK |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic |
genre_facet |
Arctic Arctic |
op_source |
Geissler , W H , Gebhardt , A C , Gross , F , Wollenburg , J , Jensen , L , Schmidt-Aursch , M C , Krastel , S , Elger , J & Osti , G 2016 , ' Arctic megaslide at presumed rest ' , Scientific Reports , vol. 6 , 38529 . https://doi.org/10.1038/srep38529 |
op_relation |
https://pure.au.dk/portal/en/publications/81c17797-ee27-4903-9ef1-88218e2459f4 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/srep38529 |
container_title |
Scientific Reports |
container_volume |
6 |
container_issue |
1 |
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1789960996387815424 |