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- W2893457443 abstract "Slope failure like in the Hinlopen/Yermak Megaslide is one of the major geohazards in a changing Arcticenvironment. We analysed hydroacoustic and 2D high-resolution seismic data from the apparentlyintact continental slope immediately north of the Hinlopen/Yermak Megaslide for signs of past andfuture instabilities. Our new bathymetry and seismic data show clear evidence for incipient slopeinstability. Minor slide deposits and an internally-deformed sedimentary layer near the base of thegas 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 thebase of the gas hydrate stability zone demonstrate that over-pressured fluids might have played akey role in the initiation of slope failure at the studied slope, but more importantly also for the giantHYM slope failure. To date, it is not clear, if the studied slope is fully preconditioned to fail completelyin future or if it might be slowly deforming and creeping at present. We detected widespread methaneseepage on the adjacent shallow shelf areas not sealed by gas hydrates." @default.
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- W2893457443 date "2017-01-01" @default.
- W2893457443 modified "2023-09-27" @default.
- W2893457443 title "Arctic megaslide at presumed rest" @default.
- W2893457443 hasPublicationYear "2017" @default.
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