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Evidence for active strike-slip faulting along the Eurasia-Africa convergence zone: Implications for seismic hazard in the southwest Iberian margin

2012; Geological Society of America; Volume: 40; Issue: 6 Linguagem: Inglês

10.1130/g33107.1

1943-2682

Rafael Bartolomé, Eulália Gràcia, Daniel Stich, S. Martínez‐Loriente, Dirk Klaeschen, Flor de Lis Mancilla, Claudio Lo Iacono, Juanjo Dañobeitia, Nevio Zitellini,

Geological and Geochemical Analysis

Research Article| June 01, 2012 Evidence for active strike-slip faulting along the Eurasia-Africa convergence zone: Implications for seismic hazard in the southwest Iberian margin Rafael Bartolome; Rafael Bartolome 1Unidad de Tecnología Marina, CSIC, E-08003 Barcelona, Spain Search for other works by this author on: GSW Google Scholar Eulàlia Gràcia; Eulàlia Gràcia 1Unidad de Tecnología Marina, CSIC, E-08003 Barcelona, Spain Search for other works by this author on: GSW Google Scholar Daniel Stich; Daniel Stich 2Instituto Andaluz de Geofísica (IAG), Universidad de Granada, E-18071 Granada, Spain Search for other works by this author on: GSW Google Scholar Sara Martínez-Loriente; Sara Martínez-Loriente 1Unidad de Tecnología Marina, CSIC, E-08003 Barcelona, Spain Search for other works by this author on: GSW Google Scholar Dirk Klaeschen; Dirk Klaeschen 3IFM-GEOMAR, D-24148 Kiel, Germany Search for other works by this author on: GSW Google Scholar Flor de Lis Mancilla; Flor de Lis Mancilla 2Instituto Andaluz de Geofísica (IAG), Universidad de Granada, E-18071 Granada, Spain Search for other works by this author on: GSW Google Scholar Claudio Lo Iacono; Claudio Lo Iacono 1Unidad de Tecnología Marina, CSIC, E-08003 Barcelona, Spain Search for other works by this author on: GSW Google Scholar Juan José Dañobeitia; Juan José Dañobeitia 1Unidad de Tecnología Marina, CSIC, E-08003 Barcelona, Spain Search for other works by this author on: GSW Google Scholar Nevio Zitellini Nevio Zitellini 4Istituto di Scienze Marine, CNR, 40129 Bologna, Italy Search for other works by this author on: GSW Google Scholar Geology (2012) 40 (6): 495–498. https://doi.org/10.1130/G33107.1 Article history received: 09 Dec 2011 rev-recd: 09 Jan 2012 accepted: 10 Jan 2012 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Rafael Bartolome, Eulàlia Gràcia, Daniel Stich, Sara Martínez-Loriente, Dirk Klaeschen, Flor de Lis Mancilla, Claudio Lo Iacono, Juan José Dañobeitia, Nevio Zitellini; Evidence for active strike-slip faulting along the Eurasia-Africa convergence zone: Implications for seismic hazard in the southwest Iberian margin. Geology 2012;; 40 (6): 495–498. doi: https://doi.org/10.1130/G33107.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract New seismic imaging and seismotectonic data from the southwest Iberian margin, the site of the present-day boundary between the European and African plates, reveal that active strike slip is occurring along two prominent lineaments that have recently been mapped using multibeam bathymetry. Multichannel seismic and subbottom profiler images acquired across the lineaments show seafloor displacements and active faulting to depths of at least 10 km and of a minimum length of 150 km. Seismic moment tensors show predominantly WNW–ESE right-lateral strike-slip motion, i.e., oblique to the direction of plate convergence. Estimates of earthquake source depths close to the fault planes indicate upper mantle (i.e., depths of 40–60 km) seismogenesis, implying the presence of old, thick, and brittle lithosphere. The estimated fault seismic parameters indicate that the faults are capable of generating great magnitude (Mw ≥ 8.0) earthquakes. Such large events raise the concomitant possibility of slope failures that have the potential to trigger tsunamis. Consequently, our findings identify an unreported earthquake and tsunami hazard for the Iberian and north African coastal areas. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.