Structural evolution of the El Salvador Fault Zone: an evolving fault system within a volcanic arc

The El Salvador Fault Zone, firstly identified after the 13th February 2001 Mw 6.6 El Salvador earthquake, is a 150 km long, 20 km wide right-lateral strike-slip fault system. Ruptures along the ESFZ are thought to be responsible for most of the historical destructive earthquakes along the El Salvad...

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Autores: Canora Catalán, Carolina, Martínez Díaz, José Jesús, Villamor Pérez, María Pilar, Staller, A., Berryman, K.R., Álvarez Gómez, José Antonio, Capote Del Villar, Ramón, Díaz Flores, Manuel Roberto
Formato: artículo
Fecha de publicación:2014
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/33821
Acesso em linha:https://hdl.handle.net/20.500.14352/33821
Access Level:acceso abierto
Palavra-chave:551.24(728)
551.21(728)
El Salvador Fault Zone
active strike-slip fault
13 February 2001 earthquake
geomorphology
Volcanic arc
Zona de Falla de El Salvador
falla activa de desgarre
terremoto 13 Febrero 2001
geomorfología
Arco Volcánico
Geodinámica
2507 Geofísica
id ES_1df6d9d7c41b551fefaeb3dcc29208e8
oai_identifier_str oai:docta.ucm.es:20.500.14352/33821
network_acronym_str ES
network_name_str España
repository_id_str
spelling Structural evolution of the El Salvador Fault Zone: an evolving fault system within a volcanic arcCanora Catalán, CarolinaMartínez Díaz, José JesúsVillamor Pérez, María PilarStaller, A.Berryman, K.R.Álvarez Gómez, José AntonioCapote Del Villar, RamónDíaz Flores, Manuel Roberto551.24(728)551.21(728)El Salvador Fault Zoneactive strike-slip fault13 February 2001 earthquakegeomorphologyVolcanic arcZona de Falla de El Salvadorfalla activa de desgarreterremoto 13 Febrero 2001geomorfologíaArco VolcánicoGeodinámica2507 GeofísicaThe El Salvador Fault Zone, firstly identified after the 13th February 2001 Mw 6.6 El Salvador earthquake, is a 150 km long, 20 km wide right-lateral strike-slip fault system. Ruptures along the ESFZ are thought to be responsible for most of the historical destructive earthquakes along the El Salvador Volcanic Arc, as well as for most of the current seismicity of the area. In this work, we focus on the geological setting of the fault zone by describing its geomorphology and structure, using field-based observations, digital terrain modelling, and aerial photograph interpretation with the aim at contributing to the understanding of the ESFZ slip behaviour. In particular, we address the ESFZ structure, kinematics and evolution with time. The ESFZ is a complex set of traces divided in major rupture segments characterized by different geometry, kinematics and geomorphic expressions. Natural fault exposures and paleoseismic trenches excavated along the fault show that the strike-slip deformation is distributed in several planes. Both geometry and kinematics of the fault zone are consistent with a transtensional strain regime. The estimated geological slip rate for the main fault segments by paleoseismic trenches and displaced geomorphic features implies a deficit in velocity of the fault compared to the available GPS velocities data. The high vertical scarps of some fault segments would require Quaternary slip rates not coherent neither with measured GPS velocities nor with slip rates obtained from paleoseismic analysis. This mismatch suggests a pre-existing graben structure that would be inherited from the previous regional roll back related extensional stage. We consider that the ESFZ is using this relict structure to grow up along it. As a result, we ropose a model for ESFZ development consistent with all these observations.Universidad Complutense de MadridUniversidad Complutense de Madrid20142014-01-0120142014-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/33821reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/338212026-06-02T12:44:21Z
dc.title.none.fl_str_mv Structural evolution of the El Salvador Fault Zone: an evolving fault system within a volcanic arc
title Structural evolution of the El Salvador Fault Zone: an evolving fault system within a volcanic arc
spellingShingle Structural evolution of the El Salvador Fault Zone: an evolving fault system within a volcanic arc
Canora Catalán, Carolina
551.24(728)
551.21(728)
El Salvador Fault Zone
active strike-slip fault
13 February 2001 earthquake
geomorphology
Volcanic arc
Zona de Falla de El Salvador
falla activa de desgarre
terremoto 13 Febrero 2001
geomorfología
Arco Volcánico
Geodinámica
2507 Geofísica
title_short Structural evolution of the El Salvador Fault Zone: an evolving fault system within a volcanic arc
title_full Structural evolution of the El Salvador Fault Zone: an evolving fault system within a volcanic arc
title_fullStr Structural evolution of the El Salvador Fault Zone: an evolving fault system within a volcanic arc
title_full_unstemmed Structural evolution of the El Salvador Fault Zone: an evolving fault system within a volcanic arc
title_sort Structural evolution of the El Salvador Fault Zone: an evolving fault system within a volcanic arc
dc.creator.none.fl_str_mv Canora Catalán, Carolina
Martínez Díaz, José Jesús
Villamor Pérez, María Pilar
Staller, A.
Berryman, K.R.
Álvarez Gómez, José Antonio
Capote Del Villar, Ramón
Díaz Flores, Manuel Roberto
author Canora Catalán, Carolina
author_facet Canora Catalán, Carolina
Martínez Díaz, José Jesús
Villamor Pérez, María Pilar
Staller, A.
Berryman, K.R.
Álvarez Gómez, José Antonio
Capote Del Villar, Ramón
Díaz Flores, Manuel Roberto
author_role author
author2 Martínez Díaz, José Jesús
Villamor Pérez, María Pilar
Staller, A.
Berryman, K.R.
Álvarez Gómez, José Antonio
Capote Del Villar, Ramón
Díaz Flores, Manuel Roberto
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 551.24(728)
551.21(728)
El Salvador Fault Zone
active strike-slip fault
13 February 2001 earthquake
geomorphology
Volcanic arc
Zona de Falla de El Salvador
falla activa de desgarre
terremoto 13 Febrero 2001
geomorfología
Arco Volcánico
Geodinámica
2507 Geofísica
topic 551.24(728)
551.21(728)
El Salvador Fault Zone
active strike-slip fault
13 February 2001 earthquake
geomorphology
Volcanic arc
Zona de Falla de El Salvador
falla activa de desgarre
terremoto 13 Febrero 2001
geomorfología
Arco Volcánico
Geodinámica
2507 Geofísica
description The El Salvador Fault Zone, firstly identified after the 13th February 2001 Mw 6.6 El Salvador earthquake, is a 150 km long, 20 km wide right-lateral strike-slip fault system. Ruptures along the ESFZ are thought to be responsible for most of the historical destructive earthquakes along the El Salvador Volcanic Arc, as well as for most of the current seismicity of the area. In this work, we focus on the geological setting of the fault zone by describing its geomorphology and structure, using field-based observations, digital terrain modelling, and aerial photograph interpretation with the aim at contributing to the understanding of the ESFZ slip behaviour. In particular, we address the ESFZ structure, kinematics and evolution with time. The ESFZ is a complex set of traces divided in major rupture segments characterized by different geometry, kinematics and geomorphic expressions. Natural fault exposures and paleoseismic trenches excavated along the fault show that the strike-slip deformation is distributed in several planes. Both geometry and kinematics of the fault zone are consistent with a transtensional strain regime. The estimated geological slip rate for the main fault segments by paleoseismic trenches and displaced geomorphic features implies a deficit in velocity of the fault compared to the available GPS velocities data. The high vertical scarps of some fault segments would require Quaternary slip rates not coherent neither with measured GPS velocities nor with slip rates obtained from paleoseismic analysis. This mismatch suggests a pre-existing graben structure that would be inherited from the previous regional roll back related extensional stage. We consider that the ESFZ is using this relict structure to grow up along it. As a result, we ropose a model for ESFZ development consistent with all these observations.
publishDate 2014
dc.date.none.fl_str_mv 2014
2014-01-01
2014
2014-01-01
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/20.500.14352/33821
url https://hdl.handle.net/20.500.14352/33821
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.publisher.none.fl_str_mv Universidad Complutense de Madrid
publisher.none.fl_str_mv Universidad Complutense de Madrid
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
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score 15.300719

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