New insights on the crustal deformation in the Eastern Betics from densified GNSS data

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 N...

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Autores: Portela, J., Staller, A., Béjar-Pizarro, M., Martínez-Díaz, J. J., Álvarez-Gómez, J. A., Khazaradze, Giorgi
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2025
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:2445/224437
Acceso en línea:https://hdl.handle.net/2445/224437
Access Level:acceso abierto
Palabra clave:Geodèsia
Geodinàmica
Sismologia
Tectònica
Falles (Geologia)
Geodesy
Geodynamics
Seismology
Tectonics
Faults (Geology)
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repository_id_str
spelling New insights on the crustal deformation in the Eastern Betics from densified GNSS dataPortela, J.Staller, A.Béjar-Pizarro, M.Martínez-Díaz, J. J.Álvarez-Gómez, J. A.Khazaradze, GiorgiGeodèsiaGeodinàmicaSismologiaTectònicaFalles (Geologia)GeodesyGeodynamicsSeismologyTectonicsFaults (Geology)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.Wiley2025202520252025info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion24 p.application/pdfhttps://hdl.handle.net/2445/224437Articles 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)InglésReproducció del document publicat a: https://doi.org/https://doi.org/10.1029/2024TC008381Tectonics, 2025, vol. 44, num.2, p. 1-24https://doi.org/https://doi.org/10.1029/2024TC008381cc-by-nc-nd (c) J. Portela et. al., 2025https://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:recercat.cat:2445/2244372026-05-29T05:05:01Z
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.
Geodèsia
Geodinàmica
Sismologia
Tectònica
Falles (Geologia)
Geodesy
Geodynamics
Seismology
Tectonics
Faults (Geology)
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.
Staller, A.
Béjar-Pizarro, M.
Martínez-Díaz, J. J.
Álvarez-Gómez, J. A.
Khazaradze, Giorgi
author Portela, J.
author_facet Portela, J.
Staller, A.
Béjar-Pizarro, M.
Martínez-Díaz, J. J.
Álvarez-Gómez, J. A.
Khazaradze, Giorgi
author_role author
author2 Staller, A.
Béjar-Pizarro, M.
Martínez-Díaz, J. J.
Álvarez-Gómez, J. A.
Khazaradze, Giorgi
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Geodèsia
Geodinàmica
Sismologia
Tectònica
Falles (Geologia)
Geodesy
Geodynamics
Seismology
Tectonics
Faults (Geology)
topic Geodèsia
Geodinàmica
Sismologia
Tectònica
Falles (Geologia)
Geodesy
Geodynamics
Seismology
Tectonics
Faults (Geology)
description 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
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/224437
url https://hdl.handle.net/2445/224437
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/https://doi.org/10.1029/2024TC008381
Tectonics, 2025, vol. 44, num.2, p. 1-24
https://doi.org/https://doi.org/10.1029/2024TC008381
dc.rights.none.fl_str_mv cc-by-nc-nd (c) J. Portela et. al., 2025
https://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by-nc-nd (c) J. Portela et. al., 2025
https://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 24 p.
application/pdf
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
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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