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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ftawi:oai:epic.awi.de:42546 2023-05-15T14:27:06+02:00 Arctic megaslide at presumed rest Geissler, Wolfram Gebhardt, Catalina Gross, Felix Wollenburg, Jutta Jensen, Laura Schmidt-Aursch, Mechita Krastel, Sebastian Elger, Judith Osti, Giacomo 2016 https://epic.awi.de/id/eprint/42546/ http://www.nature.com/articles/srep38529 https://hdl.handle.net/10013/epic.49179 unknown Springer Nature Geissler, W. orcid:0000-0001-6807-555X , Gebhardt, C. orcid:0000-0002-3227-0676 , Gross, F. , Wollenburg, J. orcid:0000-0002-8169-8310 , Jensen, L. , Schmidt-Aursch, M. orcid:0000-0002-2393-4514 , Krastel, S. , Elger, J. and Osti, G. (2016) Arctic megaslide at presumed rest , Scientific Reports, 6 (38529) . doi:10.1038/srep38529 <https://doi.org/10.1038/srep38529> , hdl:10013/epic.49179 EPIC3Scientific Reports, Springer Nature, 6(38529), ISSN: 2045-2322 Article isiRev 2016 ftawi https://doi.org/10.1038/srep38529 2021-12-24T15:42:11Z 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 Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Scientific Reports 6 1 |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
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 Gebhardt, Catalina Gross, Felix Wollenburg, Jutta Jensen, Laura Schmidt-Aursch, Mechita Krastel, Sebastian Elger, Judith Osti, Giacomo |
spellingShingle |
Geissler, Wolfram Gebhardt, Catalina Gross, Felix Wollenburg, Jutta Jensen, Laura Schmidt-Aursch, Mechita Krastel, Sebastian Elger, Judith Osti, Giacomo Arctic megaslide at presumed rest |
author_facet |
Geissler, Wolfram Gebhardt, Catalina Gross, Felix Wollenburg, Jutta Jensen, Laura Schmidt-Aursch, Mechita Krastel, Sebastian Elger, Judith Osti, Giacomo |
author_sort |
Geissler, Wolfram |
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 |
Springer Nature |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/42546/ http://www.nature.com/articles/srep38529 https://hdl.handle.net/10013/epic.49179 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic |
genre_facet |
Arctic Arctic |
op_source |
EPIC3Scientific Reports, Springer Nature, 6(38529), ISSN: 2045-2322 |
op_relation |
Geissler, W. orcid:0000-0001-6807-555X , Gebhardt, C. orcid:0000-0002-3227-0676 , Gross, F. , Wollenburg, J. orcid:0000-0002-8169-8310 , Jensen, L. , Schmidt-Aursch, M. orcid:0000-0002-2393-4514 , Krastel, S. , Elger, J. and Osti, G. (2016) Arctic megaslide at presumed rest , Scientific Reports, 6 (38529) . doi:10.1038/srep38529 <https://doi.org/10.1038/srep38529> , hdl:10013/epic.49179 |
op_doi |
https://doi.org/10.1038/srep38529 |
container_title |
Scientific Reports |
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6 |
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1 |
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1766300685344702464 |