New Insights on the Crustal Deformation in the Eastern Betics From Densified GNSS Data

[EN] The Eastern Betic cordillera, southeastern Spain, is characterized by slow tectonic deformation rates and moderate seismicity. Great uncertainties persist regarding the precise kinematics of the main fault system within the region, the Eastern Betic Shear Zone (EBSZ). We present a new GNSS (Glo...

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Autores: Portela, J. J., Staller, Alejandra, Béjar Pizarro, Marta, Martínez Díaz, J. J., Álvarez Gómez, José Antonio, Khazaradze, Giorgi
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/402820
Acesso em linha:http://hdl.handle.net/10261/402820
https://api.elsevier.com/content/abstract/scopus_id/85218942000
Access Level:acceso abierto
Palavra-chave:Tectonics
Eastern Betic Shear Zone
Eastern Betics
GNSS
Kinematic models
Tectonic deformation
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spelling New Insights on the Crustal Deformation in the Eastern Betics From Densified GNSS DataPortela, J. J.Staller, AlejandraBéjar Pizarro, MartaMartínez Díaz, J. J.Álvarez Gómez, José AntonioKhazaradze, GiorgiTectonicsEastern Betic Shear ZoneEastern BeticsGNSSKinematic modelsTectonic deformation[EN] The Eastern Betic cordillera, southeastern Spain, is characterized by slow tectonic deformation rates and moderate seismicity. Great uncertainties persist regarding the precise kinematics of the main fault system within the region, the Eastern Betic Shear Zone (EBSZ). We present a new GNSS (Global Navigation Satellite System) velocity field in the Eastern Betics, including new episodic and continuous stations belonging to the GeoActiva network, as well as all available continuous stations in southern Iberia. We use this data to build kinematic models with elastic blocks, obtaining slip rates and locking ratios in the main faults of the EBSZ. Our model suggests that the central EBSZ is dominated by reverse and sinistral motion, accommodated by two fault branches closing the Guadalentín and Segura valleys. For the first time, we use geodetic data to quantify how slip is distributed between these branches in the central EBSZ: the Alhama de Murcia fault (western branch) accommodates up to 1.3 mm/yr sinistral and 0.6 mm/yr reverse slip, while the Palomares fault (eastern branch) is slower (0.5 mm/yr sinistral and 0.3 mm/yr reverse slip). Although slip rates are higher in the south Palomares and Carboneras faults, data scarcity limits their constraint. The deformation in the northern limit of the Eastern Betics appears to be distributed between the Jumilla and Crevillente faults. On a regional scale, our data suggest that the Nubia-Eurasia plate convergence is distributed radially from the Eastern Betics, consistent with the escape of multiple blocks driven by indentation and rollback tectonics in the Alboran Sea.This work is part of the PhD thesis of J.P. and was supported by Grant FPU19/03929, funded by MCIN/AEI/10.13039/501100011033 and by “FSE invests in your future”; by (GeoActiva) Project CGL2017-83931-C3-3-P, funded by MCIN/AEI/10.13039/501100011033 and by “ERDF A way of making Europe”; as well as by projects SARAI (PID2020-116540RB-C22) and NSOURCES (PID2020-119772RB-I00), funded by MCIN/AEI/10.13039/501100011033.Peer reviewedAmerican Geophysical UnionAgencia Estatal de Investigación (España)European CommissionPortela, J. J. [0000-0001-7944-5747]Staller, Alejandra [0000-0003-0335-0949]Béjar Pizarro, Marta [0000-0001-7449-4048]Martínez Díaz, J. J. [0000-0003-4846-0279]Álvarez Gómez, José Antonio [0000-0002-2814-3172]Khazaradze, Giorgi [0000-0002-1190-0296]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/402820https://api.elsevier.com/content/abstract/scopus_id/85218942000reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI//FPU19info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2017-83931-C3-3-Pinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-116540RB-C22info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-119772RB-I00https://doi.org/10.1029/2024TC008381Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4028202026-05-22T06:33:51Z
dc.title.none.fl_str_mv New Insights on the Crustal Deformation in the Eastern Betics From Densified GNSS Data
title New Insights on the Crustal Deformation in the Eastern Betics From Densified GNSS Data
spellingShingle New Insights on the Crustal Deformation in the Eastern Betics From Densified GNSS Data
Portela, J. J.
Tectonics
Eastern Betic Shear Zone
Eastern Betics
GNSS
Kinematic models
Tectonic deformation
title_short New Insights on the Crustal Deformation in the Eastern Betics From Densified GNSS Data
title_full New Insights on the Crustal Deformation in the Eastern Betics From Densified GNSS Data
title_fullStr New Insights on the Crustal Deformation in the Eastern Betics From Densified GNSS Data
title_full_unstemmed New Insights on the Crustal Deformation in the Eastern Betics From Densified GNSS Data
title_sort New Insights on the Crustal Deformation in the Eastern Betics From Densified GNSS Data
dc.creator.none.fl_str_mv Portela, J. J.
Staller, Alejandra
Béjar Pizarro, Marta
Martínez Díaz, J. J.
Álvarez Gómez, José Antonio
Khazaradze, Giorgi
author Portela, J. J.
author_facet Portela, J. J.
Staller, Alejandra
Béjar Pizarro, Marta
Martínez Díaz, J. J.
Álvarez Gómez, José Antonio
Khazaradze, Giorgi
author_role author
author2 Staller, Alejandra
Béjar Pizarro, Marta
Martínez Díaz, J. J.
Álvarez Gómez, José Antonio
Khazaradze, Giorgi
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Agencia Estatal de Investigación (España)
European Commission
Portela, J. J. [0000-0001-7944-5747]
Staller, Alejandra [0000-0003-0335-0949]
Béjar Pizarro, Marta [0000-0001-7449-4048]
Martínez Díaz, J. J. [0000-0003-4846-0279]
Álvarez Gómez, José Antonio [0000-0002-2814-3172]
Khazaradze, Giorgi [0000-0002-1190-0296]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Tectonics
Eastern Betic Shear Zone
Eastern Betics
GNSS
Kinematic models
Tectonic deformation
topic Tectonics
Eastern Betic Shear Zone
Eastern Betics
GNSS
Kinematic models
Tectonic deformation
description [EN] The Eastern Betic cordillera, southeastern Spain, is characterized by slow tectonic deformation rates and moderate seismicity. Great uncertainties persist regarding the precise kinematics of the main fault system within the region, the Eastern Betic Shear Zone (EBSZ). We present a new GNSS (Global Navigation Satellite System) velocity field in the Eastern Betics, including new episodic and continuous stations belonging to the GeoActiva network, as well as all available continuous stations in southern Iberia. We use this data to build kinematic models with elastic blocks, obtaining slip rates and locking ratios in the main faults of the EBSZ. Our model suggests that the central EBSZ is dominated by reverse and sinistral motion, accommodated by two fault branches closing the Guadalentín and Segura valleys. For the first time, we use geodetic data to quantify how slip is distributed between these branches in the central EBSZ: the Alhama de Murcia fault (western branch) accommodates up to 1.3 mm/yr sinistral and 0.6 mm/yr reverse slip, while the Palomares fault (eastern branch) is slower (0.5 mm/yr sinistral and 0.3 mm/yr reverse slip). Although slip rates are higher in the south Palomares and Carboneras faults, data scarcity limits their constraint. The deformation in the northern limit of the Eastern Betics appears to be distributed between the Jumilla and Crevillente faults. On a regional scale, our data suggest that the Nubia-Eurasia plate convergence is distributed radially from the Eastern Betics, consistent with the escape of multiple blocks driven by indentation and rollback tectonics in the Alboran Sea.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/402820
https://api.elsevier.com/content/abstract/scopus_id/85218942000
url http://hdl.handle.net/10261/402820
https://api.elsevier.com/content/abstract/scopus_id/85218942000
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI//FPU19
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2017-83931-C3-3-P
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-116540RB-C22
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-119772RB-I00
https://doi.org/10.1029/2024TC008381
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Geophysical Union
publisher.none.fl_str_mv American Geophysical Union
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
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