An exceptionally long paleoseismic record of a slow-moving fault: the Alhama de Murcia fault (Eastern Betic Shear Zone, Spain)

Most catastrophic earthquakes occur along fast-moving faults, although some of them are triggered by slow-moving ones. Long paleoseismic histories are infrequent in the latter faults. Here, an exceptionally long paleoseismic record (more than 300 k.y.) of a slow-moving structure is presented for the...

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Autores: Ortuño Candela, Maria, Masana, Eulàlia, García Meléndez, Eduardo, Martínez-Díaz, José J., Těpančíková, Petra, Cunha, Pedro Proença, Sohbati, Reza, Canora, Carolina, Buylaert, Jan-Pieter, Murria, Andrew S.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2012
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/163418
Acceso en línea:https://hdl.handle.net/2445/163418
Access Level:acceso abierto
Palabra clave:Paleosismologia
Sismologia
Serralades Bètiques
Paleoseismology
Seismology
Benéticos Range (Spain)
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spelling An exceptionally long paleoseismic record of a slow-moving fault: the Alhama de Murcia fault (Eastern Betic Shear Zone, Spain)Ortuño Candela, MariaMasana, EulàliaGarcía Meléndez, EduardoMartínez-Díaz, José J.Těpančíková, PetraCunha, Pedro ProençaSohbati, RezaCanora, CarolinaBuylaert, Jan-PieterMurria, Andrew S.PaleosismologiaSismologiaSerralades BètiquesPaleoseismologySeismologyBenéticos Range (Spain)Most catastrophic earthquakes occur along fast-moving faults, although some of them are triggered by slow-moving ones. Long paleoseismic histories are infrequent in the latter faults. Here, an exceptionally long paleoseismic record (more than 300 k.y.) of a slow-moving structure is presented for the southern tip of the Alhama de Murcia fault (Eastern Betic shear zone), which is characterized by morphological expression of current tectonic activity and by a lack of historical seismicity. At its tip, the fault divides into a splay with two main faults bounding the Góñar fault system. At this area, the condensed sedimentation and the distribution of the deformation in several structures provided us with more opportunities to obtain a complete paleoseismic record than at other segments of the fault. The tectonic deformation of the system was studied by an integrated structural, geomorphological, and paleoseismological approach. Stratigraphic and tectonic features at six paleoseismic trenches indicate that old alluvial units have been repeatedly folded and thrusted over younger ones along the different traces of the structure. The correlation of the event timing inferred for each of these trenches and the application of an improved protocol for the infrared stimulated luminescence (IRSL) dating of K-feldspar allowed us to constrain a paleoseismic record as old as 325 ka. We identifi ed a minimum of six possible paleoearthquakes of Mw = 6-7 and a maximum mean recurrence interval of 29 k.y. This provides compelling evidence for the underestimation of the seismic hazard in the region.Geological Society of America2020202020122020info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion70 p.application/pdfapplication/pdfhttps://hdl.handle.net/2445/163418Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: https://doi.org/10.1130/B30558.1Geological Society of America Bulletin, 2012, vol. 124, num. 9-10, p. 1474-1494https://doi.org/10.1130/B30558.1(c) Geological Society of America, 2012info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1634182026-05-29T05:05:01Z
dc.title.none.fl_str_mv An exceptionally long paleoseismic record of a slow-moving fault: the Alhama de Murcia fault (Eastern Betic Shear Zone, Spain)
title An exceptionally long paleoseismic record of a slow-moving fault: the Alhama de Murcia fault (Eastern Betic Shear Zone, Spain)
spellingShingle An exceptionally long paleoseismic record of a slow-moving fault: the Alhama de Murcia fault (Eastern Betic Shear Zone, Spain)
Ortuño Candela, Maria
Paleosismologia
Sismologia
Serralades Bètiques
Paleoseismology
Seismology
Benéticos Range (Spain)
title_short An exceptionally long paleoseismic record of a slow-moving fault: the Alhama de Murcia fault (Eastern Betic Shear Zone, Spain)
title_full An exceptionally long paleoseismic record of a slow-moving fault: the Alhama de Murcia fault (Eastern Betic Shear Zone, Spain)
title_fullStr An exceptionally long paleoseismic record of a slow-moving fault: the Alhama de Murcia fault (Eastern Betic Shear Zone, Spain)
title_full_unstemmed An exceptionally long paleoseismic record of a slow-moving fault: the Alhama de Murcia fault (Eastern Betic Shear Zone, Spain)
title_sort An exceptionally long paleoseismic record of a slow-moving fault: the Alhama de Murcia fault (Eastern Betic Shear Zone, Spain)
dc.creator.none.fl_str_mv Ortuño Candela, Maria
Masana, Eulàlia
García Meléndez, Eduardo
Martínez-Díaz, José J.
Těpančíková, Petra
Cunha, Pedro Proença
Sohbati, Reza
Canora, Carolina
Buylaert, Jan-Pieter
Murria, Andrew S.
author Ortuño Candela, Maria
author_facet Ortuño Candela, Maria
Masana, Eulàlia
García Meléndez, Eduardo
Martínez-Díaz, José J.
Těpančíková, Petra
Cunha, Pedro Proença
Sohbati, Reza
Canora, Carolina
Buylaert, Jan-Pieter
Murria, Andrew S.
author_role author
author2 Masana, Eulàlia
García Meléndez, Eduardo
Martínez-Díaz, José J.
Těpančíková, Petra
Cunha, Pedro Proença
Sohbati, Reza
Canora, Carolina
Buylaert, Jan-Pieter
Murria, Andrew S.
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Paleosismologia
Sismologia
Serralades Bètiques
Paleoseismology
Seismology
Benéticos Range (Spain)
topic Paleosismologia
Sismologia
Serralades Bètiques
Paleoseismology
Seismology
Benéticos Range (Spain)
description Most catastrophic earthquakes occur along fast-moving faults, although some of them are triggered by slow-moving ones. Long paleoseismic histories are infrequent in the latter faults. Here, an exceptionally long paleoseismic record (more than 300 k.y.) of a slow-moving structure is presented for the southern tip of the Alhama de Murcia fault (Eastern Betic shear zone), which is characterized by morphological expression of current tectonic activity and by a lack of historical seismicity. At its tip, the fault divides into a splay with two main faults bounding the Góñar fault system. At this area, the condensed sedimentation and the distribution of the deformation in several structures provided us with more opportunities to obtain a complete paleoseismic record than at other segments of the fault. The tectonic deformation of the system was studied by an integrated structural, geomorphological, and paleoseismological approach. Stratigraphic and tectonic features at six paleoseismic trenches indicate that old alluvial units have been repeatedly folded and thrusted over younger ones along the different traces of the structure. The correlation of the event timing inferred for each of these trenches and the application of an improved protocol for the infrared stimulated luminescence (IRSL) dating of K-feldspar allowed us to constrain a paleoseismic record as old as 325 ka. We identifi ed a minimum of six possible paleoearthquakes of Mw = 6-7 and a maximum mean recurrence interval of 29 k.y. This provides compelling evidence for the underestimation of the seismic hazard in the region.
publishDate 2012
dc.date.none.fl_str_mv 2012
2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/163418
url https://hdl.handle.net/2445/163418
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1130/B30558.1
Geological Society of America Bulletin, 2012, vol. 124, num. 9-10, p. 1474-1494
https://doi.org/10.1130/B30558.1
dc.rights.none.fl_str_mv (c) Geological Society of America, 2012
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Geological Society of America, 2012
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 70 p.
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Geological Society of America
publisher.none.fl_str_mv Geological Society of America
dc.source.none.fl_str_mv Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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