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| Gràcia, Eulàlia; Grevemeyer, Ingo; Bartolomé, Rafael; Perea, Hector; Martínez-loriente, Sara; Gómez De La Peña, Laura; Villaseñor, Antonio; Klinger, Yann; Lo Iacono, Claudio; Diez, Susana; Calahorrano, Alcinoe; Camafort, Miquel; Costa, Sergio; D’acremont, Elia; Rabaute, Alain; Ranero, César R.. |
| Large continental faults extend for thousands of kilometres to form boundaries between rigid tectonic blocks. These faults are associated with prominent topographic features and can produce large earthquakes. Here we show the first evidence of a major tectonic structure in its initial-stage, the Al-Idrissi Fault System (AIFS), in the Alboran Sea. Combining bathymetric and seismic reflection data, together with seismological analyses of the 2016 Mw 6.4 earthquake offshore Morocco – the largest event ever recorded in the area – we unveil a 3D geometry for the AIFS. We report evidence of left-lateral strike-slip displacement, characterise the fault segmentation and demonstrate that AIFS is the source of the 2016 events. The occurrence of the Mw 6.4 earthquake... |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00513/62427/66705.pdf |
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| 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. |
| 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... |
| Tipo: Text |
Palavras-chave: Multichannel seismics; Fault-bend folds; Blind thrusts; Strike-slip faults; Seismic hazard assessment; Iberia-Africa boundary. |
| Ano: 2013 |
URL: https://archimer.ifremer.fr/doc/00264/37513/36759.pdf |
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