| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
First direct observation of coseismic slip and seafloor rupture along a submarine normal fault and implications for fault slip history
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| Autores: |
Escartin, Javier
Leclerc, Frederique
Olive, Jean-arthur
Mevel, Catherine
Cannat, Mathilde
Petersen, Sven
Augustin, Nico
Feuillet, Nathalie
Deplus, Christine
Bezos, Antoine
Bonnemains, Diane
Chavagnac, Valerie
Choi, Yujin
Godard, Marguerite
Haaga, Kristian A.
Hamelin, Cedric
Ildefonse, Benoit
Jamieson, John W.
John, Barbara E.
Leleu, Thomas
Macleod, Christopher J.
Massot-campos, Miguel
Nomikou, Paraskevi
Paquet, Marine
Rommevaux-jestin, Celine
Rothenbeck, Marcel
Steinfuehrer, Anja
Tominaga, Masako
Triebe, Lars
Campos, Ricard
Gracias, Nuno
Garcia, Rafael
Andreani, Muriel
Vilaseca, Geraud
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| Data: |
2016-09
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| Ano: |
2016
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| Palavras-chave: |
Submarine fault
Surface rupture
Earthquake
Fault slip
Neotectonics
Microbathymetry
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| Resumo: |
Properly assessing the extent and magnitude of fault ruptures associated with large earthquakes is critical for understanding fault behavior and associated hazard. Submarine faults can trigger tsunamis, whose characteristics are defined by the geometry of seafloor displacement, studied primarily through indirect observations (e.g., seismic event parameters, seismic profiles, shipboard bathymetry, coring) rather than direct ones. Using deep-sea vehicles, we identify for the first time a marker of coseismic slip on a submarine fault plane along the Roseau Fault (Lesser Antilles), and measure its vertical displacement of ∼0.9 m in situ. We also map recent fissuring and faulting of sediments on the hangingwall, along ∼3 km of rupture in close proximity to the fault's base, and document the reactivation of erosion and sedimentation within and downslope of the scarp. These deformation structures were caused by the 2004 Mw 6.3 Les Saintes earthquake, which triggered a subsequent tsunami. Their characterization informs estimates of earthquake recurrence on this fault and provides new constraints on the geometry of fault rupture, which is both shorter and displays locally larger coseismic displacements than available model predictions that lack field constraints. This methodology of detailed field observations coupled with near-bottom geophysical surveying can be readily applied to numerous submarine fault systems, and should prove useful in evaluating seismic and tsunamigenic hazard in all geodynamic contexts.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
https://archimer.ifremer.fr/doc/00344/45500/45051.pdf
https://archimer.ifremer.fr/doc/00344/45500/45052.csv
DOI:10.1016/j.epsl.2016.06.024
https://archimer.ifremer.fr/doc/00344/45500/
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| Editor: |
Elsevier Science Bv
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| Formato: |
application/pdf
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| Fonte: |
Earth And Planetary Science Letters (0012-821X) (Elsevier Science Bv), 2016-09 , Vol. 450 , P. 96-107
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| Direitos: |
2016 Published by Elsevier B.V.
info:eu-repo/semantics/openAccess
restricted use
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