Arc-parallel vs back-arc extension in the Western Gibraltar arc : is the Gibraltar forearc still active?

Extremely tight arcs, framed within the Eurasia-Africa convergence region, developed during the Neogene on both sides of the western Mediterranean. A complex interplate deformation zone has been invoked to explain their structural trend-line patterns, the shortening directions and the development of...

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Autores: Balanyá, J. C., Crespo Blanc, Ana|||0000-0003-3723-2529, Díaz-Azpiroz, M., Expósito Barea, Isabel|||0000-0002-2084-5487, Torcal, F., Pérez-Peña, José Vicente|||0000-0001-8880-7375, Booth-Rea, G.
Tipo de recurso: artículo
Fecha de publicación:2012
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:99650
Acceso en línea:https://ddd.uab.cat/record/99650
https://dx.doi.org/urn:doi:10.1344/105.000001771
Access Level:acceso abierto
Palabra clave:Forearc tectonics
Strain partitioning
Crustal earthquakes
Gibraltar arc
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spelling Arc-parallel vs back-arc extension in the Western Gibraltar arc : is the Gibraltar forearc still active?Balanyá, J. C.Crespo Blanc, Ana|||0000-0003-3723-2529Díaz-Azpiroz, M.Expósito Barea, Isabel|||0000-0002-2084-5487Torcal, F.Pérez-Peña, José Vicente|||0000-0001-8880-7375Booth-Rea, G.Forearc tectonicsStrain partitioningCrustal earthquakesGibraltar arcExtremely tight arcs, framed within the Eurasia-Africa convergence region, developed during the Neogene on both sides of the western Mediterranean. A complex interplate deformation zone has been invoked to explain their structural trend-line patterns, the shortening directions and the development of back-arc basins. Updated structural and kinematic maps, combined with earthquake data covering the complete hinge zone of the western Gibraltar arc help us to explore the mode of strain partitioning from 25My ago to present. During the Miocene, the strain partitioning pattern showed arc-perpendicular shortening in the active orogenic wedge -assessed from the radial pattern of tectonic transport directions- accompained by subhorizontal stretching. Structures accommodating stretching fall into two categories on the basis of their space distribution and their relationships with the structural trend-line pattern: i) arc-parallel stretching structures in the external wedge (mainly normal faults and conjugate strike-slip faults); and ii) extensional faults developed in the hinterland zone in which transport directions are centripetal towards the Alborán back-arc basin. Pliocene to Recent deformational structures together with focal solutions from crustal earthquakes (n=167; 1.5. 22012-01-0120122012-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/99650https://dx.doi.org/urn:doi:10.1344/105.000001771reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengopen accesshttp://purl.org/coar/access_right/c_abf2Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre i quan aquestes es distribueixin sota la mateixa llicència que regula l'obra original i es reconegui l'autoria.https://creativecommons.org/licenses/by-sa/3.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:996502026-06-06T12:50:31Z
dc.title.none.fl_str_mv Arc-parallel vs back-arc extension in the Western Gibraltar arc : is the Gibraltar forearc still active?
title Arc-parallel vs back-arc extension in the Western Gibraltar arc : is the Gibraltar forearc still active?
spellingShingle Arc-parallel vs back-arc extension in the Western Gibraltar arc : is the Gibraltar forearc still active?
Balanyá, J. C.
Forearc tectonics
Strain partitioning
Crustal earthquakes
Gibraltar arc
title_short Arc-parallel vs back-arc extension in the Western Gibraltar arc : is the Gibraltar forearc still active?
title_full Arc-parallel vs back-arc extension in the Western Gibraltar arc : is the Gibraltar forearc still active?
title_fullStr Arc-parallel vs back-arc extension in the Western Gibraltar arc : is the Gibraltar forearc still active?
title_full_unstemmed Arc-parallel vs back-arc extension in the Western Gibraltar arc : is the Gibraltar forearc still active?
title_sort Arc-parallel vs back-arc extension in the Western Gibraltar arc : is the Gibraltar forearc still active?
dc.creator.none.fl_str_mv Balanyá, J. C.
Crespo Blanc, Ana|||0000-0003-3723-2529
Díaz-Azpiroz, M.
Expósito Barea, Isabel|||0000-0002-2084-5487
Torcal, F.
Pérez-Peña, José Vicente|||0000-0001-8880-7375
Booth-Rea, G.
author Balanyá, J. C.
author_facet Balanyá, J. C.
Crespo Blanc, Ana|||0000-0003-3723-2529
Díaz-Azpiroz, M.
Expósito Barea, Isabel|||0000-0002-2084-5487
Torcal, F.
Pérez-Peña, José Vicente|||0000-0001-8880-7375
Booth-Rea, G.
author_role author
author2 Crespo Blanc, Ana|||0000-0003-3723-2529
Díaz-Azpiroz, M.
Expósito Barea, Isabel|||0000-0002-2084-5487
Torcal, F.
Pérez-Peña, José Vicente|||0000-0001-8880-7375
Booth-Rea, G.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Forearc tectonics
Strain partitioning
Crustal earthquakes
Gibraltar arc
topic Forearc tectonics
Strain partitioning
Crustal earthquakes
Gibraltar arc
description Extremely tight arcs, framed within the Eurasia-Africa convergence region, developed during the Neogene on both sides of the western Mediterranean. A complex interplate deformation zone has been invoked to explain their structural trend-line patterns, the shortening directions and the development of back-arc basins. Updated structural and kinematic maps, combined with earthquake data covering the complete hinge zone of the western Gibraltar arc help us to explore the mode of strain partitioning from 25My ago to present. During the Miocene, the strain partitioning pattern showed arc-perpendicular shortening in the active orogenic wedge -assessed from the radial pattern of tectonic transport directions- accompained by subhorizontal stretching. Structures accommodating stretching fall into two categories on the basis of their space distribution and their relationships with the structural trend-line pattern: i) arc-parallel stretching structures in the external wedge (mainly normal faults and conjugate strike-slip faults); and ii) extensional faults developed in the hinterland zone in which transport directions are centripetal towards the Alborán back-arc basin. Pliocene to Recent deformational structures together with focal solutions from crustal earthquakes (n=167; 1.5.
publishDate 2012
dc.date.none.fl_str_mv 2
2012-01-01
2012
2012-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/99650
https://dx.doi.org/urn:doi:10.1344/105.000001771
url https://ddd.uab.cat/record/99650
https://dx.doi.org/urn:doi:10.1344/105.000001771
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
https://creativecommons.org/licenses/by-sa/3.0/
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
https://creativecommons.org/licenses/by-sa/3.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
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