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Connection between the Jurassic oceanic lithosphere of the Gulf of Cádiz and the Alboran slab imaged by Sp receiver functions
dc.contributor.author | Molina-Aguilera, Antonio | |
dc.contributor.author | Mancilla Pérez, Flor de Lis | |
dc.contributor.author | Morales, José | |
dc.contributor.author | Stich, Daniel | |
dc.contributor.author | Yuan, Xiaohui | |
dc.contributor.author | Heit, Benjamin | |
dc.date.accessioned | 2020-02-17T10:15:50Z | |
dc.date.available | 2020-02-17T10:15:50Z | |
dc.date.issued | 2019-01-29 | |
dc.identifier.citation | Molina-Aguilera, A., et al., 2019, Connection between the Jurassic oceanic lithosphere of the Gulf of Cádiz and the Alboran slab imaged by Sp receiver functions: Geology, v. 47, p. 227–230, | es_ES |
dc.identifier.uri | http://hdl.handle.net/10481/59723 | |
dc.description.abstract | We investigate the lithospheric structure beneath the Gibraltar arc (western Mediterranean) using S-wave receiver functions (SRFs). From a dense network deployed in the Ibero-Maghrebian region during different seismic surveys, we calculated ~11,000 SRFs that sample the upper mantle detecting the lithosphere-asthenosphere boundary (LAB). The observed seismic LAB belongs to different lithospheric domains: Iberian and African forelands, Alboran domain, and Atlantic Ocean. Common conversion point (CCP) migrated profiles show the geometrical relation among them. Under the Strait of Gibraltar, we observe a deep LAB (~150 km). It can be associated with Jurassic-age lithosphere of ~120 km thickness, one of the thickest ever reported in oceanic environments. There is an abrupt offset between the oceanic LAB and the shallow (80-km-deep) continental LAB of the Iberian foreland, suggesting displacement along a former transform fault. The northwestern African continental LAB is 90–100 km deep. The oceanic LAB under the Gibraltar arc continues to ~180 km depth beneath the Alboran Sea, showing the connection between the Alboran slab and the oceanic lithosphere in the central Gulf of Cádiz. This geometry agrees with an ~200-km-wide corridor of oceanic lithosphere between the central Atlantic and the Alpine Tethys, developed during the Middle–Late Jurassic. Our results support the proposed westward rollback of an oceanic east-dipping slab, which has continuity at least to the central Gulf of Cádiz. | es_ES |
dc.description.sponsorship | This work was supported by the Spanish national projects CGL2015-67130-C2-2-R/FEDER and CGL2012-31472. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Geological Society of America | es_ES |
dc.rights | Atribución 3.0 España | * |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/es/ | * |
dc.title | Connection between the Jurassic oceanic lithosphere of the Gulf of Cádiz and the Alboran slab imaged by Sp receiver functions | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es_ES |
dc.identifier.doi | 10.1130/G45654.1 |