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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Nature Research
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ftoceanrep:oai:oceanrep.geomar.de:35436 2023-05-15T14:26:51+02:00 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 text https://oceanrep.geomar.de/id/eprint/35436/ https://oceanrep.geomar.de/id/eprint/35436/1/srep38529.pdf https://oceanrep.geomar.de/id/eprint/35436/7/srep46821.pdf https://doi.org/10.1038/srep38529 en eng Nature Research https://oceanrep.geomar.de/id/eprint/35436/1/srep38529.pdf https://oceanrep.geomar.de/id/eprint/35436/7/srep46821.pdf Geissler, W. H., Gebhardt, A. C., Gross, F., Wollenburg, J., Jensen, L., Schmidt-Aursch, M. C., Krastel, S., Elger, J. and Osti, G. (2016) Arctic megaslide at presumed rest. Open Access Scientific Reports, 6 (38529). DOI 10.1038/srep38529 <https://doi.org/10.1038/srep38529>. doi:10.1038/srep38529 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2016 ftoceanrep https://doi.org/10.1038/srep38529 2023-04-07T15:30:09Z 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 OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Scientific Reports 6 1 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
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 |
publisher |
Nature Research |
publishDate |
2016 |
url |
https://oceanrep.geomar.de/id/eprint/35436/ https://oceanrep.geomar.de/id/eprint/35436/1/srep38529.pdf https://oceanrep.geomar.de/id/eprint/35436/7/srep46821.pdf https://doi.org/10.1038/srep38529 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic |
genre_facet |
Arctic Arctic |
op_relation |
https://oceanrep.geomar.de/id/eprint/35436/1/srep38529.pdf https://oceanrep.geomar.de/id/eprint/35436/7/srep46821.pdf Geissler, W. H., Gebhardt, A. C., Gross, F., Wollenburg, J., Jensen, L., Schmidt-Aursch, M. C., Krastel, S., Elger, J. and Osti, G. (2016) Arctic megaslide at presumed rest. Open Access Scientific Reports, 6 (38529). DOI 10.1038/srep38529 <https://doi.org/10.1038/srep38529>. doi:10.1038/srep38529 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/srep38529 |
container_title |
Scientific Reports |
container_volume |
6 |
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1 |
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1766300294100025344 |