Three-dimensional architecture of foreland basins from seismic noise recording: tectonic implications for the western end of the Guadalquivir Basin

The Variscan and Mesozoic basement are covered by Neogene and Quaternary sediments belonging to the Guadalquivir foreland Basin (southern Spain). This study explores the subsurface of the northern margin of its westernmost sector using the HVSR method, recording seismic noise at 334 stations between...

Descripción completa

Detalles Bibliográficos
Autores: Amador Luna, David, Macau, Albert, Fernández Rodríguez, Carlos, Alonso Chaves, Francisco M.
Tipo de recurso: artículo
Fecha de publicación:2025
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/124745
Acceso en línea:https://hdl.handle.net/20.500.14352/124745
Access Level:acceso abierto
Palabra clave:551.24(460)
HVSR method
Seismic noise
Guadalquivir Basin
Fundamental frequency
3-D model
Horst-graben system
Geodinámica
2506.20 Geología Estructural
id ES_2f406e55f95cfc2e5620f2fffa512a3e
oai_identifier_str oai:docta.ucm.es:20.500.14352/124745
network_acronym_str ES
network_name_str España
repository_id_str
spelling Three-dimensional architecture of foreland basins from seismic noise recording: tectonic implications for the western end of the Guadalquivir BasinAmador Luna, DavidMacau, AlbertFernández Rodríguez, CarlosAlonso Chaves, Francisco M.551.24(460)HVSR methodSeismic noiseGuadalquivir BasinFundamental frequency3-D modelHorst-graben systemGeodinámica2506.20 Geología EstructuralThe Variscan and Mesozoic basement are covered by Neogene and Quaternary sediments belonging to the Guadalquivir foreland Basin (southern Spain). This study explores the subsurface of the northern margin of its westernmost sector using the HVSR method, recording seismic noise at 334 stations between the mouths of the Guadiana and the Guadalquivir rivers, near Doñana National Park. Fundamental frequency and basement measurements enabled the estimation of an empirical formula for basement depth: h = 80.16·f0−1.48. Five distinct HVSR responses were obtained: (a) low-frequency peaks, indicating deep substratum; (b) high-frequency peaks, shallow bedrock; (c) broad peaks, potential critical zones (3D-2D effects, suggesting faults); (d) double peaks (marshlands); and (e) no peaks, near-outcropping bedrock. The soil fundamental frequencies range from 0.23 to 18 Hz, with bedrock depth ranges from 1 to 5 m in the northwest to over 600 m in the southeast. Borehole data correlate strongly with HVSR-derived results, with typical discrepancies of only a few tens of meters, likely due to the presence of non-geological basement acting as a mechanical basement. Although the possibility of ancient fluvial terraces of the Guadalquivir River contributing to abrupt slope changes is considered, H/V spectra with broad peaks suggest tectonic origins. This study presents the first regional three-dimensional model of the basin basement over an area exceeding 2300 km2, revealing a horst-and-graben system formed by foreland deformation linked to the westward advance of the Rif-Betic orogenic front.MDPIUniversidad Complutense de Madrid20252025-09-0320252025-09-03journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/124745reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/1247452026-06-02T12:44:21Z
dc.title.none.fl_str_mv Three-dimensional architecture of foreland basins from seismic noise recording: tectonic implications for the western end of the Guadalquivir Basin
title Three-dimensional architecture of foreland basins from seismic noise recording: tectonic implications for the western end of the Guadalquivir Basin
spellingShingle Three-dimensional architecture of foreland basins from seismic noise recording: tectonic implications for the western end of the Guadalquivir Basin
Amador Luna, David
551.24(460)
HVSR method
Seismic noise
Guadalquivir Basin
Fundamental frequency
3-D model
Horst-graben system
Geodinámica
2506.20 Geología Estructural
title_short Three-dimensional architecture of foreland basins from seismic noise recording: tectonic implications for the western end of the Guadalquivir Basin
title_full Three-dimensional architecture of foreland basins from seismic noise recording: tectonic implications for the western end of the Guadalquivir Basin
title_fullStr Three-dimensional architecture of foreland basins from seismic noise recording: tectonic implications for the western end of the Guadalquivir Basin
title_full_unstemmed Three-dimensional architecture of foreland basins from seismic noise recording: tectonic implications for the western end of the Guadalquivir Basin
title_sort Three-dimensional architecture of foreland basins from seismic noise recording: tectonic implications for the western end of the Guadalquivir Basin
dc.creator.none.fl_str_mv Amador Luna, David
Macau, Albert
Fernández Rodríguez, Carlos
Alonso Chaves, Francisco M.
author Amador Luna, David
author_facet Amador Luna, David
Macau, Albert
Fernández Rodríguez, Carlos
Alonso Chaves, Francisco M.
author_role author
author2 Macau, Albert
Fernández Rodríguez, Carlos
Alonso Chaves, Francisco M.
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 551.24(460)
HVSR method
Seismic noise
Guadalquivir Basin
Fundamental frequency
3-D model
Horst-graben system
Geodinámica
2506.20 Geología Estructural
topic 551.24(460)
HVSR method
Seismic noise
Guadalquivir Basin
Fundamental frequency
3-D model
Horst-graben system
Geodinámica
2506.20 Geología Estructural
description The Variscan and Mesozoic basement are covered by Neogene and Quaternary sediments belonging to the Guadalquivir foreland Basin (southern Spain). This study explores the subsurface of the northern margin of its westernmost sector using the HVSR method, recording seismic noise at 334 stations between the mouths of the Guadiana and the Guadalquivir rivers, near Doñana National Park. Fundamental frequency and basement measurements enabled the estimation of an empirical formula for basement depth: h = 80.16·f0−1.48. Five distinct HVSR responses were obtained: (a) low-frequency peaks, indicating deep substratum; (b) high-frequency peaks, shallow bedrock; (c) broad peaks, potential critical zones (3D-2D effects, suggesting faults); (d) double peaks (marshlands); and (e) no peaks, near-outcropping bedrock. The soil fundamental frequencies range from 0.23 to 18 Hz, with bedrock depth ranges from 1 to 5 m in the northwest to over 600 m in the southeast. Borehole data correlate strongly with HVSR-derived results, with typical discrepancies of only a few tens of meters, likely due to the presence of non-geological basement acting as a mechanical basement. Although the possibility of ancient fluvial terraces of the Guadalquivir River contributing to abrupt slope changes is considered, H/V spectra with broad peaks suggest tectonic origins. This study presents the first regional three-dimensional model of the basin basement over an area exceeding 2300 km2, revealing a horst-and-graben system formed by foreland deformation linked to the westward advance of the Rif-Betic orogenic front.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025-09-03
2025
2025-09-03
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/124745
url https://hdl.handle.net/20.500.14352/124745
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
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
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
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
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
_version_ 1869405465520111616
score 15.811543

Similares en LA Referencia