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 de´ collement system, a multi-layered ductile shear extending from 10km to between 30 and 40km below sea level. This float was formed as consequence of the col...

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Authors: Gómez Ballesteros, María, Rivera, Jesus, Muñoz, Araceli, Muñoz Martín, Alfonso, Acosta, Juan, Carbo Gorosabel, Andrés, Uchupi, E.
Format: article
Publication Date:2008
Country:España
Institution:Universidad Complutense de Madrid (UCM)
Repository:Docta Complutense
Language:English
OAI Identifier:oai:docta.ucm.es:20.500.14352/52609
Online Access:https://hdl.handle.net/20.500.14352/52609
Access Level:Open access
Keyword:Alboran Ridge
Alboran Basin
Carbonate mounds
Conjugate faults
Motril and Adra anticlines
Orogenic float
Stress regime (pure and simple shear)
Serrata-Carboneras Fault
Geodinámica
2507 Geofísica
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spelling Alboran basin, Southern Spain. Part II: Neogene tectonic implications for the orogenic float modelGómez Ballesteros, MaríaRivera, JesusMuñoz, AraceliMuñoz Martín, AlfonsoAcosta, JuanCarbo Gorosabel, AndrésUchupi, E.Alboran RidgeAlboran BasinCarbonate moundsConjugate faultsMotril and Adra anticlinesOrogenic floatStress regime (pure and simple shear)Serrata-Carboneras FaultGeodinámica2507 GeofísicaWe infer that the Alboran Basin, the first western Mediterranean Basin found after crossing Gibraltar, is an orogenic float underlained by a de´ collement system, a multi-layered ductile shear extending from 10km to between 30 and 40km 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.Universidad Complutense de Madrid20082008-01-0120082008-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/52609reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/526092026-06-02T12:44:21Z
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
Alboran Ridge
Alboran Basin
Carbonate mounds
Conjugate faults
Motril and Adra anticlines
Orogenic float
Stress regime (pure and simple shear)
Serrata-Carboneras Fault
Geodinámica
2507 Geofísica
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, Jesus
Muñoz, Araceli
Muñoz Martín, Alfonso
Acosta, Juan
Carbo Gorosabel, Andrés
Uchupi, E.
author Gómez Ballesteros, María
author_facet Gómez Ballesteros, María
Rivera, Jesus
Muñoz, Araceli
Muñoz Martín, Alfonso
Acosta, Juan
Carbo Gorosabel, Andrés
Uchupi, E.
author_role author
author2 Rivera, Jesus
Muñoz, Araceli
Muñoz Martín, Alfonso
Acosta, Juan
Carbo Gorosabel, Andrés
Uchupi, E.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv Alboran Ridge
Alboran Basin
Carbonate mounds
Conjugate faults
Motril and Adra anticlines
Orogenic float
Stress regime (pure and simple shear)
Serrata-Carboneras Fault
Geodinámica
2507 Geofísica
topic Alboran Ridge
Alboran Basin
Carbonate mounds
Conjugate faults
Motril and Adra anticlines
Orogenic float
Stress regime (pure and simple shear)
Serrata-Carboneras Fault
Geodinámica
2507 Geofísica
description We infer that the Alboran Basin, the first western Mediterranean Basin found after crossing Gibraltar, is an orogenic float underlained by a de´ collement system, a multi-layered ductile shear extending from 10km to between 30 and 40km 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
2008-01-01
2008
2008-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/52609
url https://hdl.handle.net/20.500.14352/52609
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869403116468699136
score 15,300719

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