Pliocene-Quaternary Deformational Structures in the Eastern Algarve Continental Shelf, Gulf of Cadiz

The eastern Algarve continental shelf in the northern margin of the Gulf of Cadiz has been investigated by analysing a set of high-resolution seismic reflection profiles. We examine the major structural elements affecting the upper sedimentary units. A seismo-stratigraphic interpretation and regiona...

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Detalles Bibliográficos
Autores: Luján, María, Lobo, Francisco José, Mestdagh, Thomas, Vázquez, Juan Tomás, Fernández-Puga, M. C., Van Rooij, D.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/225328
Acceso en línea:http://hdl.handle.net/10261/225328
Access Level:acceso abierto
Palabra clave:Gulf of Cadiz
Continental shelf
Pliocene-Quaternary deformation
seismic stratigraphy
Golfo de Cádiz
Plataforma continental
Deformación pliocena-cuaternaria
Estratigrafía sísmica
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spelling Pliocene-Quaternary Deformational Structures in the Eastern Algarve Continental Shelf, Gulf of CadizDeformaciones Pliocenas y Cuaternarias en la Plataforma Continental Oriental del Algarve, Golfo de CádizLuján, MaríaLobo, Francisco JoséMestdagh, ThomasVázquez, Juan TomásFernández-Puga, M. C.Van Rooij, D.Gulf of CadizContinental shelfPliocene-Quaternary deformationseismic stratigraphyGolfo de CádizPlataforma continentalDeformación pliocena-cuaternariaEstratigrafía sísmicaThe eastern Algarve continental shelf in the northern margin of the Gulf of Cadiz has been investigated by analysing a set of high-resolution seismic reflection profiles. We examine the major structural elements affecting the upper sedimentary units. A seismo-stratigraphic interpretation and regional correlation allowed the identification of a major discontinuity that separates two main intervals, pre-Middle Pleistocene (MP) and post-MP. In addition, a number of deformation features such as ENE-WSW to NE-SW thrusts, kilometric-scale N-S to NW-SE folds and NNE-SSW to NNW-SSE sub-vertical normal faults were identified affecting the Pliocene-Quaternary sedimentary record, indicating neotectonic activity. The structures pre-dating MP are in agreement with a dominant transpressive regime along the continental shelf, under the Late Cenozoic NW-SE oblique convergence and related to the reactivation of Mesozoic diapiric structures. The structures post-dating MP induce a lower deformation of the sedimentary cover but were still active during the last glacial maximum, in agreement with the low uplift recognized in the Portuguese mainland.[ES] La plataforma continental del Algarve en el margen septentrio-nal del Golfo de Cádiz ha sido investigada mediante el análisis de una red de perfiles sísmicos de alta resolución. Se presentan las prin-cipales estructuras que afectan a la cobertera sedimentaria super-ficial. Una interpretación sismoestratigráfica y correlaciones a nivel regional han permitido diferenciar dos intervalos separados por una discontinuidad principal, anterior y posterior al Pleistoceno Medio (PM). Los depósitos del Plioceno y Cuaternario están deformados por estructuras de deformación tales como cabalgamientos ENE-OSO a NE-SO, pliegues N-S a NO-SE de escala kilométrica y fallas subverticales NNE-SSO a NNO-SSE, que indican actividad neotec-tónica. Las estructuras anteriores al PM se generan en relación con el régimen transpresivo (NO-SE) dominante a fInales del Cenozoico en esta región y la reactivación de las estructuras diapíricas mesozoicas observadas en el margen. En cambio, las estructuras posteriores al PM producen una ligera deformación de la cobertera sedimentaria y actividad durante el último máximo glaciar, lo que concuerda con un moderado levantamiento tectónico observado en la zona conti-nental del margen portugués.The research was supported through projects CGL2011-30302 and CTM2017- 88237-P and Group RNM-373 of Junta de Andalucía. We are very grateful to Javier Hernández Molina for his critical reading of the manuscript. We thank Guillermo Booth and Ferrán Estrada for their detailed reviews and constructive comments of the original version of the manuscript.Sociedad Geológica de EspañaMinisterio de Economía y Competitividad (España)Ministerio de Ciencia, Innovación y Universidades (España)Junta de AndalucíaConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2020202020202020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/225328reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/CTM2017- 88237-PSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2253282026-05-22T06:33:51Z
dc.title.none.fl_str_mv Pliocene-Quaternary Deformational Structures in the Eastern Algarve Continental Shelf, Gulf of Cadiz
Deformaciones Pliocenas y Cuaternarias en la Plataforma Continental Oriental del Algarve, Golfo de Cádiz
title Pliocene-Quaternary Deformational Structures in the Eastern Algarve Continental Shelf, Gulf of Cadiz
spellingShingle Pliocene-Quaternary Deformational Structures in the Eastern Algarve Continental Shelf, Gulf of Cadiz
Luján, María
Gulf of Cadiz
Continental shelf
Pliocene-Quaternary deformation
seismic stratigraphy
Golfo de Cádiz
Plataforma continental
Deformación pliocena-cuaternaria
Estratigrafía sísmica
title_short Pliocene-Quaternary Deformational Structures in the Eastern Algarve Continental Shelf, Gulf of Cadiz
title_full Pliocene-Quaternary Deformational Structures in the Eastern Algarve Continental Shelf, Gulf of Cadiz
title_fullStr Pliocene-Quaternary Deformational Structures in the Eastern Algarve Continental Shelf, Gulf of Cadiz
title_full_unstemmed Pliocene-Quaternary Deformational Structures in the Eastern Algarve Continental Shelf, Gulf of Cadiz
title_sort Pliocene-Quaternary Deformational Structures in the Eastern Algarve Continental Shelf, Gulf of Cadiz
dc.creator.none.fl_str_mv Luján, María
Lobo, Francisco José
Mestdagh, Thomas
Vázquez, Juan Tomás
Fernández-Puga, M. C.
Van Rooij, D.
author Luján, María
author_facet Luján, María
Lobo, Francisco José
Mestdagh, Thomas
Vázquez, Juan Tomás
Fernández-Puga, M. C.
Van Rooij, D.
author_role author
author2 Lobo, Francisco José
Mestdagh, Thomas
Vázquez, Juan Tomás
Fernández-Puga, M. C.
Van Rooij, D.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Ministerio de Ciencia, Innovación y Universidades (España)
Junta de Andalucía
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Gulf of Cadiz
Continental shelf
Pliocene-Quaternary deformation
seismic stratigraphy
Golfo de Cádiz
Plataforma continental
Deformación pliocena-cuaternaria
Estratigrafía sísmica
topic Gulf of Cadiz
Continental shelf
Pliocene-Quaternary deformation
seismic stratigraphy
Golfo de Cádiz
Plataforma continental
Deformación pliocena-cuaternaria
Estratigrafía sísmica
description The eastern Algarve continental shelf in the northern margin of the Gulf of Cadiz has been investigated by analysing a set of high-resolution seismic reflection profiles. We examine the major structural elements affecting the upper sedimentary units. A seismo-stratigraphic interpretation and regional correlation allowed the identification of a major discontinuity that separates two main intervals, pre-Middle Pleistocene (MP) and post-MP. In addition, a number of deformation features such as ENE-WSW to NE-SW thrusts, kilometric-scale N-S to NW-SE folds and NNE-SSW to NNW-SSE sub-vertical normal faults were identified affecting the Pliocene-Quaternary sedimentary record, indicating neotectonic activity. The structures pre-dating MP are in agreement with a dominant transpressive regime along the continental shelf, under the Late Cenozoic NW-SE oblique convergence and related to the reactivation of Mesozoic diapiric structures. The structures post-dating MP induce a lower deformation of the sedimentary cover but were still active during the last glacial maximum, in agreement with the low uplift recognized in the Portuguese mainland.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020
2020
2020
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/10261/225328
url http://hdl.handle.net/10261/225328
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/CTM2017- 88237-P
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Sociedad Geológica de España
publisher.none.fl_str_mv Sociedad Geológica de España
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
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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