Mapping the crustal structure beneath the eastern Pyrenees

Two passive seismic profiles have been acquired in the eastern Pyrenees as part of the Pyrope and Orogen projects to investigate the crustal structure differences between this area and the central and western Pyrenees. Up to 28 broad-band stations were deployed along two orthogonal lines, with an in...

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Autores: Diaz, J., Vergés Masip, Jaume, Chevrot, Sébastien, Antonio-Vigil, A., Ruiz Fernández, Mario, Sylvander, Matthieu, Gallart Muset, Josep
Tipo de recurso: artículo
Fecha de publicación:2018
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/171535
Acceso en línea:http://hdl.handle.net/10261/171535
Access Level:acceso abierto
Palabra clave:Crustal structure beneath eastern Pyrenees
Receiver function stacked sections
Local events modelling
Geological interpretation of the results
Eastward limit of the crustal imbrication
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spelling Mapping the crustal structure beneath the eastern PyreneesDiaz, J.Vergés Masip, JaumeChevrot, SébastienAntonio-Vigil, A.Ruiz Fernández, MarioSylvander, MatthieuGallart Muset, JosepCrustal structure beneath eastern PyreneesReceiver function stacked sectionsLocal events modellingGeological interpretation of the resultsEastward limit of the crustal imbricationTwo passive seismic profiles have been acquired in the eastern Pyrenees as part of the Pyrope and Orogen projects to investigate the crustal structure differences between this area and the central and western Pyrenees. Up to 28 broad-band stations were deployed along two orthogonal lines, with an interstation spacing close to 10 km. High frequency receiver functions allowed us to obtain the main lithospheric interfaces along those lines. The NNE-SSW profile shows a well-defined Moho beneath Iberia, slightly deepening northwards. Beneath the Axial zone the Moho appears to be segmented but does not show evidence of crustal imbrication. Further North, the Moho appears again as a continuous interface located around 30 km depth. This image clearly differs from the conspicuous imbrication between the Iberian and Eurasian crusts observed westward. The E-W profile shows a smooth Moho thinning from a 40 km depth to the west of the profile to 23 km close to the coastline, evidencing the crustal thinning related to the Neogene extensional processes. Additional constraints on the geometry of the crust/mantle boundary in the Eastern Pyrenees are obtained from local moderate magnitude earthquakes recorded along the seismic lines during the experiment. In particular, a fan profile built from an event located near the Mediterranean coast suggests that crustal thickness differences between Iberian and Eurasian crusts can still be recognized 30 km westward of the Mediterranean coast, in an area that seems to mark the limit between regions dominated by compressive and extensive processes. We propose a model in which the observed dissimilar Moho structure beneath the Eastern Pyrenees is interpreted as the result of a different Mesozoic pre-shortening margin configuration. Seismic results are consistent with recently proposed tectonic models including an intermediate continental block separating Iberia and Europe by two basins with extremely thin crust or exhumed mantle.This work was funded by the Spanish Ministry of Economy and Competitiveness Project MISTERIOS (CGL2013-48601-C2-2-R), with additional support from the Generalitat de Catalunya grant 2017SGR1022 and projects ALPIMED (PIE-CSIC-201530E082) and SUBTETIS (PIE-CSIC-201830E039). The PYROPE experiment was supported by the French Research Agency ANR blanc programme (project PYROPE, ANR-09-BLAN-0229).Peer reviewedElsevierGeneralitat de CatalunyaMinisterio de Economía y Competitividad (España)Diaz, J. [0000-0003-1801-0541]Vergés, Jaume [0000-0002-4467-5291]Ruiz Fernández, Mario [0000-0002-0924-8980]Gallart Muset, Josep [0000-0003-3833-9571]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201820182018info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/171535reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#MINECO/CGL2013-48601-C2-2-Rhttps://doi.org/10.1016/j.tecto.2018.07.011Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1715352026-05-22T06:33:51Z
dc.title.none.fl_str_mv Mapping the crustal structure beneath the eastern Pyrenees
title Mapping the crustal structure beneath the eastern Pyrenees
spellingShingle Mapping the crustal structure beneath the eastern Pyrenees
Diaz, J.
Crustal structure beneath eastern Pyrenees
Receiver function stacked sections
Local events modelling
Geological interpretation of the results
Eastward limit of the crustal imbrication
title_short Mapping the crustal structure beneath the eastern Pyrenees
title_full Mapping the crustal structure beneath the eastern Pyrenees
title_fullStr Mapping the crustal structure beneath the eastern Pyrenees
title_full_unstemmed Mapping the crustal structure beneath the eastern Pyrenees
title_sort Mapping the crustal structure beneath the eastern Pyrenees
dc.creator.none.fl_str_mv Diaz, J.
Vergés Masip, Jaume
Chevrot, Sébastien
Antonio-Vigil, A.
Ruiz Fernández, Mario
Sylvander, Matthieu
Gallart Muset, Josep
author Diaz, J.
author_facet Diaz, J.
Vergés Masip, Jaume
Chevrot, Sébastien
Antonio-Vigil, A.
Ruiz Fernández, Mario
Sylvander, Matthieu
Gallart Muset, Josep
author_role author
author2 Vergés Masip, Jaume
Chevrot, Sébastien
Antonio-Vigil, A.
Ruiz Fernández, Mario
Sylvander, Matthieu
Gallart Muset, Josep
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Generalitat de Catalunya
Ministerio de Economía y Competitividad (España)
Diaz, J. [0000-0003-1801-0541]
Vergés, Jaume [0000-0002-4467-5291]
Ruiz Fernández, Mario [0000-0002-0924-8980]
Gallart Muset, Josep [0000-0003-3833-9571]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Crustal structure beneath eastern Pyrenees
Receiver function stacked sections
Local events modelling
Geological interpretation of the results
Eastward limit of the crustal imbrication
topic Crustal structure beneath eastern Pyrenees
Receiver function stacked sections
Local events modelling
Geological interpretation of the results
Eastward limit of the crustal imbrication
description Two passive seismic profiles have been acquired in the eastern Pyrenees as part of the Pyrope and Orogen projects to investigate the crustal structure differences between this area and the central and western Pyrenees. Up to 28 broad-band stations were deployed along two orthogonal lines, with an interstation spacing close to 10 km. High frequency receiver functions allowed us to obtain the main lithospheric interfaces along those lines. The NNE-SSW profile shows a well-defined Moho beneath Iberia, slightly deepening northwards. Beneath the Axial zone the Moho appears to be segmented but does not show evidence of crustal imbrication. Further North, the Moho appears again as a continuous interface located around 30 km depth. This image clearly differs from the conspicuous imbrication between the Iberian and Eurasian crusts observed westward. The E-W profile shows a smooth Moho thinning from a 40 km depth to the west of the profile to 23 km close to the coastline, evidencing the crustal thinning related to the Neogene extensional processes. Additional constraints on the geometry of the crust/mantle boundary in the Eastern Pyrenees are obtained from local moderate magnitude earthquakes recorded along the seismic lines during the experiment. In particular, a fan profile built from an event located near the Mediterranean coast suggests that crustal thickness differences between Iberian and Eurasian crusts can still be recognized 30 km westward of the Mediterranean coast, in an area that seems to mark the limit between regions dominated by compressive and extensive processes. We propose a model in which the observed dissimilar Moho structure beneath the Eastern Pyrenees is interpreted as the result of a different Mesozoic pre-shortening margin configuration. Seismic results are consistent with recently proposed tectonic models including an intermediate continental block separating Iberia and Europe by two basins with extremely thin crust or exhumed mantle.
publishDate 2018
dc.date.none.fl_str_mv 2018
2018
2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/171535
url http://hdl.handle.net/10261/171535
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
MINECO/CGL2013-48601-C2-2-R
https://doi.org/10.1016/j.tecto.2018.07.011
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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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score 15,81155

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