A refreshing 3D view of an ancient sediment collapse and slope failure
A refreshing 3D view of an ancient sediment collapse and slope failure
The combined analysis of high-resolution 2D seismics and an industrial 3D seismic data volume from the western Porcupine Basin, offshore SW Ireland, revealed an unusual picture of a buried sediment collapse and slope failure. A proportionally thin (??85?m) but vast (>?750?km2) slab of consolidated sediments started to slide downslope, in the meantime breaking into hundreds of vertically undisturbed blocks, up to 500?m in diameter. The most probably overpressured underlying horizon seems to have liquefied and acted as a slide plane until the excess pore pressure had dissipated. Then?–?still very early in the slide development?–?the process stopped, freezing the failure at its initial stage.
33-40
Huvenne, V.A.I.
f22be3e2-708c-491b-b985-a438470fa053
Croker, P.F.
b8f9893f-528a-4a45-b8ff-3ba667609453
Henriet, J.P.
afa4730b-bdb3-4074-9942-ff6ab3b68489
2002
Huvenne, V.A.I.
f22be3e2-708c-491b-b985-a438470fa053
Croker, P.F.
b8f9893f-528a-4a45-b8ff-3ba667609453
Henriet, J.P.
afa4730b-bdb3-4074-9942-ff6ab3b68489
Huvenne, V.A.I., Croker, P.F. and Henriet, J.P.
(2002)
A refreshing 3D view of an ancient sediment collapse and slope failure.
Terra Nova, 14 (1), .
Abstract
The combined analysis of high-resolution 2D seismics and an industrial 3D seismic data volume from the western Porcupine Basin, offshore SW Ireland, revealed an unusual picture of a buried sediment collapse and slope failure. A proportionally thin (??85?m) but vast (>?750?km2) slab of consolidated sediments started to slide downslope, in the meantime breaking into hundreds of vertically undisturbed blocks, up to 500?m in diameter. The most probably overpressured underlying horizon seems to have liquefied and acted as a slide plane until the excess pore pressure had dissipated. Then?–?still very early in the slide development?–?the process stopped, freezing the failure at its initial stage.
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Published date: 2002
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Local EPrints ID: 41824
URI: http://eprints.soton.ac.uk/id/eprint/41824
PURE UUID: 1705fb13-2e41-4a23-bc41-d6040141d90a
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Date deposited: 05 Oct 2006
Last modified: 28 Apr 2022 01:53
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Author:
V.A.I. Huvenne
Author:
P.F. Croker
Author:
J.P. Henriet
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