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).

Martínez-Loriente, Sara, Gràcia, Eulàlia, Bartolome, Rafael, Sallarès, Valentí, Connors, Christopher, Perea, Hector, Lo Iacono, Claudio, Klaeschen, Dirk, Terrinha, Pedro, Dañobeitia, Juan José and Zitellini, Nevio (2013) 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). Open Access Geochemistry Geophysics Geosystems, 14 (7). pp. 2206-2231. DOI 10.1002/ggge.20173.

[img]
Preview
Text
ggge20173.pdf - Published Version

Download (3959Kb) | Preview

Supplementary data:

Abstract

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.

Document Type: Article
Additional Information: WOS:000323828800009
Keywords: multichannel seismics; fault-bend folds; blind thrusts; strike-slip faults; seismic hazard assessment; Iberia-Africa boundary
Research affiliation: OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.1002/ggge.20173
ISSN: 1525-2027
Projects: EVENT, SHAKE, SALVADORE, SWIM, NEAREST, TOPOMED, SWIMGLO, FLOWS, Future Ocean
Date Deposited: 23 Oct 2013 07:52
Last Modified: 28 Feb 2018 11:14
URI: http://oceanrep.geomar.de/id/eprint/22219

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...