Alboran basin, Southern Spain. Part II: Neogene tectonic implications for the orogenic float model

We infer that the Alboran Basin, the first western Mediterranean Basin found after crossing Gibraltar, is an orogenic float underlained by a décollement system, a multi-layered ductile shear extending from 10 km to between 30 and 40 km below sea level. This float was formed as consequence of the col...

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Autores: Gómez-Ballesteros, María, Rivera, Jesús, Pereiro-Muñoz, José Antonio, Muñoz-Martín, A., Acosta-Yepes, Juan, Carbó, A., Uchupi, E.
Tipo de recurso: artículo
Fecha de publicación:2008
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/319938
Acceso en línea:http://hdl.handle.net/10261/319938
Access Level:acceso abierto
Palabra clave:Sede Central IEO
Medio Marino
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spelling Alboran basin, Southern Spain. Part II: Neogene tectonic implications for the orogenic float modelGómez-Ballesteros, MaríaRivera, JesúsPereiro-Muñoz, José AntonioMuñoz-Martín, A.Acosta-Yepes, JuanCarbó, A.Uchupi, E.Sede Central IEOMedio MarinoWe infer that the Alboran Basin, the first western Mediterranean Basin found after crossing Gibraltar, is an orogenic float underlained by a décollement system, a multi-layered ductile shear extending from 10 km to between 30 and 40 km below sea level. This float was formed as consequence of the collision of the African–Eurasian plates in the Oligocene–late Miocene. Synchronous with this compression the float experienced basin wide crustal thinning and subsidence about 25 m/year ago by subcrustal processes. Since latest Miocene the float has undergone compression due to the continuous convergence of Eurasia and Africa. The faults created as a result of this compression are dominated by a conjugate system of northeast trending left-lateral and northwest right-lateral strike–slip faults. This deformation is taking place under a simple shear mechanism. Associated with the northwest and northeast lateral faults are zones of compression trending west and east of north extending from the base of the basin's north upper slope to the Alboran Ridge. The initial morphology of the Alboran Ridge on the southern side of the Alboran Basin was due to the construction of a volcanic edifice at the northeast end of the ridge and igneous activity along northeast trending fractures southwest of the edifice. At the northeast end of the Alboran Ridge motion along a right-lateral fault cutting across the ridge led to sediment collapse and the creation of a prominent embayment on the ridge's northwest flank. Deformation is more subdued in the western than in the eastern part of the Alboran Basin, a tectonic style due either to differences in sediment rheology or that the accommodation of the convergence of Africa and Iberia is more diffused and attenuated in the west than in the east.Sí202320232008info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/319938reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésSede Central IEOhttps://www.sciencedirect.com/science/article/pii/S0264817207000621info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3199382026-05-22T06:33:51Z
dc.title.none.fl_str_mv Alboran basin, Southern Spain. Part II: Neogene tectonic implications for the orogenic float model
title Alboran basin, Southern Spain. Part II: Neogene tectonic implications for the orogenic float model
spellingShingle Alboran basin, Southern Spain. Part II: Neogene tectonic implications for the orogenic float model
Gómez-Ballesteros, María
Sede Central IEO
Medio Marino
title_short Alboran basin, Southern Spain. Part II: Neogene tectonic implications for the orogenic float model
title_full Alboran basin, Southern Spain. Part II: Neogene tectonic implications for the orogenic float model
title_fullStr Alboran basin, Southern Spain. Part II: Neogene tectonic implications for the orogenic float model
title_full_unstemmed Alboran basin, Southern Spain. Part II: Neogene tectonic implications for the orogenic float model
title_sort Alboran basin, Southern Spain. Part II: Neogene tectonic implications for the orogenic float model
dc.creator.none.fl_str_mv Gómez-Ballesteros, María
Rivera, Jesús
Pereiro-Muñoz, José Antonio
Muñoz-Martín, A.
Acosta-Yepes, Juan
Carbó, A.
Uchupi, E.
author Gómez-Ballesteros, María
author_facet Gómez-Ballesteros, María
Rivera, Jesús
Pereiro-Muñoz, José Antonio
Muñoz-Martín, A.
Acosta-Yepes, Juan
Carbó, A.
Uchupi, E.
author_role author
author2 Rivera, Jesús
Pereiro-Muñoz, José Antonio
Muñoz-Martín, A.
Acosta-Yepes, Juan
Carbó, A.
Uchupi, E.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Sede Central IEO
Medio Marino
topic Sede Central IEO
Medio Marino
description We infer that the Alboran Basin, the first western Mediterranean Basin found after crossing Gibraltar, is an orogenic float underlained by a décollement system, a multi-layered ductile shear extending from 10 km to between 30 and 40 km below sea level. This float was formed as consequence of the collision of the African–Eurasian plates in the Oligocene–late Miocene. Synchronous with this compression the float experienced basin wide crustal thinning and subsidence about 25 m/year ago by subcrustal processes. Since latest Miocene the float has undergone compression due to the continuous convergence of Eurasia and Africa. The faults created as a result of this compression are dominated by a conjugate system of northeast trending left-lateral and northwest right-lateral strike–slip faults. This deformation is taking place under a simple shear mechanism. Associated with the northwest and northeast lateral faults are zones of compression trending west and east of north extending from the base of the basin's north upper slope to the Alboran Ridge. The initial morphology of the Alboran Ridge on the southern side of the Alboran Basin was due to the construction of a volcanic edifice at the northeast end of the ridge and igneous activity along northeast trending fractures southwest of the edifice. At the northeast end of the Alboran Ridge motion along a right-lateral fault cutting across the ridge led to sediment collapse and the creation of a prominent embayment on the ridge's northwest flank. Deformation is more subdued in the western than in the eastern part of the Alboran Basin, a tectonic style due either to differences in sediment rheology or that the accommodation of the convergence of Africa and Iberia is more diffused and attenuated in the west than in the east.
publishDate 2008
dc.date.none.fl_str_mv 2008
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/319938
url http://hdl.handle.net/10261/319938
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Sede Central IEO
https://www.sciencedirect.com/science/article/pii/S0264817207000621
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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