Geometría y Cinemática de Fallas recientes en el margen septentrional del mar de Alborán (sector de Maro, provincia de Málaga)

The more recent structures in the northern continental margin of the Alboran Sea are NW-SE high-angle normal faults, oblique to the present coastal line and also to the actual crustal thinning pattern. The geometry and kinematics, with particular emphasis on the fault linkage patterns, of two of the...

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Detalhes bibliográficos
Autores: Soto, Juan I., Manzano, F. J.
Formato: artículo
Fecha de publicación:2001
País:España
Recursos:Universidad de Huelva (UHU)
Repositorio:Arias Montano. Repositorio Institucional de la Universidad de Huelva
Idioma:español
OAI Identifier:oai:ariasmontano.uhu.es:10272/9492
Acesso em linha:http://hdl.handle.net/10272/9492
Access Level:acceso abierto
Palavra-chave:Normal faults
Alboran Sea
Recent tectonics
Continental margins
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spelling Geometría y Cinemática de Fallas recientes en el margen septentrional del mar de Alborán (sector de Maro, provincia de Málaga)Geometry and Kinematics of Recent Normal Faults in the Northern Margin of the Alboran Sea (Maro Region, Málaga)Soto, Juan I.Manzano, F. J.Normal faultsAlboran SeaRecent tectonicsContinental marginsThe more recent structures in the northern continental margin of the Alboran Sea are NW-SE high-angle normal faults, oblique to the present coastal line and also to the actual crustal thinning pattern. The geometry and kinematics, with particular emphasis on the fault linkage patterns, of two of these recent faults with a preserved fault-scarp, the Las Alberquillas (av. 136/69° SW) and the Maro (av. 149/58° NE) faults, have been studied. The Maro fault is formed by several, small, and non-cylindrical fault segments (< 500 m length) frequently displaced by transfer faults, whereas the Las Alberquillas fault is formed by two long and planar fault segments (total length~ 3800 m), linked by a narrow en-echelon step, thus suggesting a major displacement in this master fault (estimated total displacement of the fault= 38 m). The maximum displacement in the Las Alberquillas fault occurs near its SE tip line, therefore suggesting the overlapping interference with a close and related synthetic normal fault in relay towards the SE in the Alboran Sea. Kinematic data on fault surfaces indicate a normal oblique sense of movement of these faults (rake of the main striae > 60°), being dextral and sinistral in the Las Alberquillas and the Maro faults, respectively. Other, secondary striae, with a right- or left-lateral sense of displacement occurs also locally near major corrugations in these faults. Average fault plane solution in both faults results in a NNE-SSW subvertical compression (P ax/s= 66/033° and 77/232°) and subhorizontal extension (T axis= 23/231° and 13/060°). Last fault slip occurred probably during the lower Pleistocene (-800 ka), on the basis of the geometrical relationships with alluvial-fan deposits and radiometric dataSociedad Geológica de España20012001-01-0120012001-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10272/9492reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelvainstname:Universidad de Huelva (UHU)Españolspaopen accesshttp://purl.org/coar/access_right/c_abf2Atribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:ariasmontano.uhu.es:10272/94922026-06-02T14:58:11Z
dc.title.none.fl_str_mv Geometría y Cinemática de Fallas recientes en el margen septentrional del mar de Alborán (sector de Maro, provincia de Málaga)
Geometry and Kinematics of Recent Normal Faults in the Northern Margin of the Alboran Sea (Maro Region, Málaga)
title Geometría y Cinemática de Fallas recientes en el margen septentrional del mar de Alborán (sector de Maro, provincia de Málaga)
spellingShingle Geometría y Cinemática de Fallas recientes en el margen septentrional del mar de Alborán (sector de Maro, provincia de Málaga)
Soto, Juan I.
Normal faults
Alboran Sea
Recent tectonics
Continental margins
title_short Geometría y Cinemática de Fallas recientes en el margen septentrional del mar de Alborán (sector de Maro, provincia de Málaga)
title_full Geometría y Cinemática de Fallas recientes en el margen septentrional del mar de Alborán (sector de Maro, provincia de Málaga)
title_fullStr Geometría y Cinemática de Fallas recientes en el margen septentrional del mar de Alborán (sector de Maro, provincia de Málaga)
title_full_unstemmed Geometría y Cinemática de Fallas recientes en el margen septentrional del mar de Alborán (sector de Maro, provincia de Málaga)
title_sort Geometría y Cinemática de Fallas recientes en el margen septentrional del mar de Alborán (sector de Maro, provincia de Málaga)
dc.creator.none.fl_str_mv Soto, Juan I.
Manzano, F. J.
author Soto, Juan I.
author_facet Soto, Juan I.
Manzano, F. J.
author_role author
author2 Manzano, F. J.
author2_role author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv Normal faults
Alboran Sea
Recent tectonics
Continental margins
topic Normal faults
Alboran Sea
Recent tectonics
Continental margins
description The more recent structures in the northern continental margin of the Alboran Sea are NW-SE high-angle normal faults, oblique to the present coastal line and also to the actual crustal thinning pattern. The geometry and kinematics, with particular emphasis on the fault linkage patterns, of two of these recent faults with a preserved fault-scarp, the Las Alberquillas (av. 136/69° SW) and the Maro (av. 149/58° NE) faults, have been studied. The Maro fault is formed by several, small, and non-cylindrical fault segments (< 500 m length) frequently displaced by transfer faults, whereas the Las Alberquillas fault is formed by two long and planar fault segments (total length~ 3800 m), linked by a narrow en-echelon step, thus suggesting a major displacement in this master fault (estimated total displacement of the fault= 38 m). The maximum displacement in the Las Alberquillas fault occurs near its SE tip line, therefore suggesting the overlapping interference with a close and related synthetic normal fault in relay towards the SE in the Alboran Sea. Kinematic data on fault surfaces indicate a normal oblique sense of movement of these faults (rake of the main striae > 60°), being dextral and sinistral in the Las Alberquillas and the Maro faults, respectively. Other, secondary striae, with a right- or left-lateral sense of displacement occurs also locally near major corrugations in these faults. Average fault plane solution in both faults results in a NNE-SSW subvertical compression (P ax/s= 66/033° and 77/232°) and subhorizontal extension (T axis= 23/231° and 13/060°). Last fault slip occurred probably during the lower Pleistocene (-800 ka), on the basis of the geometrical relationships with alluvial-fan deposits and radiometric data
publishDate 2001
dc.date.none.fl_str_mv 2001
2001-01-01
2001
2001-01-01
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 http://hdl.handle.net/10272/9492
url http://hdl.handle.net/10272/9492
dc.language.none.fl_str_mv Español
spa
language_invalid_str_mv Español
language spa
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
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
Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Sociedad Geológica de España
publisher.none.fl_str_mv Sociedad Geológica de España
dc.source.none.fl_str_mv reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelva
instname:Universidad de Huelva (UHU)
instname_str Universidad de Huelva (UHU)
reponame_str Arias Montano. Repositorio Institucional de la Universidad de Huelva
collection Arias Montano. Repositorio Institucional de la Universidad de Huelva
repository.name.fl_str_mv
repository.mail.fl_str_mv
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