Data/hora: 03/06/2024 05:00:49

Provedor de dados: | 5
País: | France
Título: | Active deformation in old oceanic lithosphere and significance for earthquake hazard: Seismic imaging of the Coral Patch Ridge area and neighboring abyssal plains (SW Iberian Margin)
Autores: | Martinez-loriente, Sara; Gracia, Eulalia; Bartolome, Rafael; Sallares, Valenti; Connors, Christopher; Perea, Hector; Lo Iacono, Claudio; Klaeschen, Dirk; Terrinha, Pedro; Jose Danobeitia, Juan; Zitellini, Nevio.
Data: | 2013-07
Ano: | 2013
Palavras-chave: | Multichannel seismics; Fault-bend folds; Blind thrusts; Strike-slip faults; Seismic hazard assessment; Iberia-Africa boundary.
Resumo: | Recently acquired high-resolution multichannel seismic profiles together with bathymetric and sub-bottom profiler data from the external part of the Gulf of Cadiz (Iberia-Africa plate boundary) reveal active deformation involving old (Mesozoic) oceanic lithosphere. This area is located 180 km offshore the SW Iberian Peninsula and embraces the prominent NE-SW trending Coral Patch Ridge, and part of the surrounding deep Horseshoe and Seine abyssal plains. E-W trending dextral strike-slip faults showing surface deformation of flower-like structures predominate in the Horseshoe Abyssal Plain, whereas NE-SW trending compressive structures prevail in the Coral Patch Ridge and Seine Hills. Although the Coral Patch Ridge region is characterized by subdued seismic activity, the area is not free from seismic hazard. Most of the newly mapped faults correspond to active blind thrusts and strike-slip faults that are able to generate large magnitude earthquakes (Mw 7.2-8.4). This may represent a significant earthquake and tsunami hazard that has been overlooked so far.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00264/37513/36759.pdf

DOI:10.1002/ggge.20173

https://archimer.ifremer.fr/doc/00264/37513/

Editor: | Amer Geophysical Union
Formato: | application/pdf
Fonte: | Geochemistry Geophysics Geosystems (1525-2027) (Amer Geophysical Union), 2013-07 , Vol. 14 , N. 7 , P. 2206-2231

Fonte:

2013. The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial- NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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