Seismicity and potencially active faults in the Northwest and Central-West Iberian Peninsula

[EN] The Northwest and Central-West Iberian Peninsula configure an intraplate area far from the active plate boundaries, where the Variscan basement crops out extensively (Iberian Massif). This area of the Iberian Peninsula has been traditionally considered a seismically stable region; however, it p...

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Detalles Bibliográficos
Autores: Martín-González, Fidel, Antón, Loreto, Insúa Arévalo, Juan Miguel, Vicente, G. de, Martínez-Díaz, J. J., Muñoz-Martín, Alfonso, Heredia, Nemesio, Olaiz, A.
Tipo de recurso: artículo
Fecha de publicación:2012
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/76057
Acceso en línea:http://hdl.handle.net/10261/76057
Access Level:acceso abierto
Palabra clave:Seismicity
Potentially active faults
Spain
Active tectonics
Neotectonics
Variscan basement
Sismicidad intraplaca
Fallas potencialmente activas
España
Tectónica activa
Neotectónica
Basamento varisco
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oai_identifier_str oai:digital.csic.es:10261/76057
network_acronym_str ES
network_name_str España
repository_id_str
spelling Seismicity and potencially active faults in the Northwest and Central-West Iberian PeninsulaSismicidad y Fallas Potencialmente Activas en el Noroeste y Centro Oeste de la Península IbéricaMartín-González, FidelAntón, LoretoInsúa Arévalo, Juan MiguelVicente, G. deMartínez-Díaz, J. J.Muñoz-Martín, AlfonsoHeredia, NemesioOlaiz, A.SeismicityPotentially active faultsSpainActive tectonicsNeotectonicsVariscan basementSismicidad intraplacaFallas potencialmente activasEspañaTectónica activaNeotectónicaBasamento varisco[EN] The Northwest and Central-West Iberian Peninsula configure an intraplate area far from the active plate boundaries, where the Variscan basement crops out extensively (Iberian Massif). This area of the Iberian Peninsula has been traditionally considered a seismically stable region; however, it presents a moderate intraplate seismicity which indicates the presence of active structures and the occurrence of potentially damaging earthquakes. The scarcity of Mesozoic and Cenozoic deposits makes very difficult to track the record of the more recent tectonic activity and the characterization of active tectonic structures within the Iberian Massif. Nevertheless the seismic sequences of 1995-1997 in Lugo (5.1 mb; IV) and 2003 in Zamora (4.2 Mw) provided important information about the orientation of the present stress tensor, and the distribution of the hypocenters informed about the rupture geometry of the fault planes. The present work integrates geological, geomorphological, structural, and seismological data in order to define the main potentially active faults in the region. Faults trending NE–SW to N–S are potentially active as strike-slip, in some cases with a reverse component, under a NW-SE to N–S compression[ES] El Noroeste y Centro Oeste de la Peninsula Ibérica son parte de una región intraplaca alejada de los bordes de placa sísmicamente activos, donde aflora el basamento varisco (Macizo Ibérico). Esta región de la Península Ibérica ha sido tradicionalmente considerada sísmicamente estable; sin embargo, presenta una moderada sismicidad que indica la presencia de estructuras activas y terremotos potencialmente catastróficos. La escasez y dispersión de los depósitos Mesozoicos y Cenozoicos hace difícil identificar la actividad tectónica más reciente, así como la caracterización de las fallas potencialmente activas dentro del Macizo Iberico. Sin embargo la sismicidad de 1995 y 1997 en Lugo (5.1 mb) y de 2003 en Zamora (4.2 Mw) aportó importante información para determinar la orientación del tensor actual de esfuerzos. De igual modo, la orientación de las replicas aportó información sobre los planos de rotura. El presente trabajo integra datos geológicos, geomorfológicos, estructurales y sismotectónicos para definir las principales fallas potencialmente activas en la región. Las fallas con orientaciones NE-SW hasta N-S son potencialmente activas, bajo un tensor de esfuerzos de NW-SE a N-S, como fallas de desgarre y en algunas zonas con componente inversaPeer reviewedCSIC-UCM - Instituto de Geociencias (IGEO)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201320132012info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/76057reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.5209/rev_JIGE.2012.v38.n1.39205Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/760572026-05-22T06:33:51Z
dc.title.none.fl_str_mv Seismicity and potencially active faults in the Northwest and Central-West Iberian Peninsula
Sismicidad y Fallas Potencialmente Activas en el Noroeste y Centro Oeste de la Península Ibérica
title Seismicity and potencially active faults in the Northwest and Central-West Iberian Peninsula
spellingShingle Seismicity and potencially active faults in the Northwest and Central-West Iberian Peninsula
Martín-González, Fidel
Seismicity
Potentially active faults
Spain
Active tectonics
Neotectonics
Variscan basement
Sismicidad intraplaca
Fallas potencialmente activas
España
Tectónica activa
Neotectónica
Basamento varisco
title_short Seismicity and potencially active faults in the Northwest and Central-West Iberian Peninsula
title_full Seismicity and potencially active faults in the Northwest and Central-West Iberian Peninsula
title_fullStr Seismicity and potencially active faults in the Northwest and Central-West Iberian Peninsula
title_full_unstemmed Seismicity and potencially active faults in the Northwest and Central-West Iberian Peninsula
title_sort Seismicity and potencially active faults in the Northwest and Central-West Iberian Peninsula
dc.creator.none.fl_str_mv Martín-González, Fidel
Antón, Loreto
Insúa Arévalo, Juan Miguel
Vicente, G. de
Martínez-Díaz, J. J.
Muñoz-Martín, Alfonso
Heredia, Nemesio
Olaiz, A.
author Martín-González, Fidel
author_facet Martín-González, Fidel
Antón, Loreto
Insúa Arévalo, Juan Miguel
Vicente, G. de
Martínez-Díaz, J. J.
Muñoz-Martín, Alfonso
Heredia, Nemesio
Olaiz, A.
author_role author
author2 Antón, Loreto
Insúa Arévalo, Juan Miguel
Vicente, G. de
Martínez-Díaz, J. J.
Muñoz-Martín, Alfonso
Heredia, Nemesio
Olaiz, A.
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Seismicity
Potentially active faults
Spain
Active tectonics
Neotectonics
Variscan basement
Sismicidad intraplaca
Fallas potencialmente activas
España
Tectónica activa
Neotectónica
Basamento varisco
topic Seismicity
Potentially active faults
Spain
Active tectonics
Neotectonics
Variscan basement
Sismicidad intraplaca
Fallas potencialmente activas
España
Tectónica activa
Neotectónica
Basamento varisco
description [EN] The Northwest and Central-West Iberian Peninsula configure an intraplate area far from the active plate boundaries, where the Variscan basement crops out extensively (Iberian Massif). This area of the Iberian Peninsula has been traditionally considered a seismically stable region; however, it presents a moderate intraplate seismicity which indicates the presence of active structures and the occurrence of potentially damaging earthquakes. The scarcity of Mesozoic and Cenozoic deposits makes very difficult to track the record of the more recent tectonic activity and the characterization of active tectonic structures within the Iberian Massif. Nevertheless the seismic sequences of 1995-1997 in Lugo (5.1 mb; IV) and 2003 in Zamora (4.2 Mw) provided important information about the orientation of the present stress tensor, and the distribution of the hypocenters informed about the rupture geometry of the fault planes. The present work integrates geological, geomorphological, structural, and seismological data in order to define the main potentially active faults in the region. Faults trending NE–SW to N–S are potentially active as strike-slip, in some cases with a reverse component, under a NW-SE to N–S compression
publishDate 2012
dc.date.none.fl_str_mv 2012
2013
2013
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/10261/76057
url http://hdl.handle.net/10261/76057
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.5209/rev_JIGE.2012.v38.n1.39205
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv CSIC-UCM - Instituto de Geociencias (IGEO)
publisher.none.fl_str_mv CSIC-UCM - Instituto de Geociencias (IGEO)
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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score 15,811543

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