Deformation and magnetic fabrics in isoclinal folds of the Variscan Pyrenees

23 p.

Detalles Bibliográficos
Autores: Oliva-Urcia, Belén, Román-Berdiel, T., Clariana, Pilar, Soto, Ruth, Izquierdo Llavall, Esther, Casas-Sainz, Antonio M.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/403559
Acceso en línea:http://hdl.handle.net/10261/403559
https://api.elsevier.com/content/abstract/scopus_id/105009415626
Access Level:acceso abierto
Palabra clave:Variscan
Alpine
Anisotropy of magnetic susceptibility
Isocline folds
Limestones
Pyrenees
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spelling Deformation and magnetic fabrics in isoclinal folds of the Variscan PyreneesOliva-Urcia, BelénRomán-Berdiel, T.Clariana, PilarSoto, RuthIzquierdo Llavall, EstherCasas-Sainz, Antonio M.VariscanAlpineAnisotropy of magnetic susceptibilityIsocline foldsLimestonesPyrenees23 p.[EN] Magnetic fabrics are used as strain markers since they reflect the orientation-distribution of grains in a rock. In this work we analyzed, from the point of view of anisotropy of magnetic susceptibility (at low-temperature and room temperature), Devonian (29 sites) and Ordovician-Silurian (3 sites) sedimentary rocks in the Pyrenean Axial Zone, totalling 611 samples. The main target is to determine the strain in relation to the Variscan (polyphased) and Alpine orogenies in limestones and shales. The magnetic information also derives from thermomagnetic curves, acquisition of the isothermal remanent magnetization (IRM) and coercivity of the remanence analyses, together with hysteresis loops and stepwise thermal demagnetization of induced IRM in 3 axes techniques. The analyses of magnetic properties were complemented with optical microscopy observations and calcimetries. In two of the sample areas (Sen and Llisat valleys), the minimum axes of the magnetic susceptibility ellipsoid (k<inf>min</inf> axes) are mostly perpendicular to bedding whereas in the other two (Zinqueta valley and near Posets peak area), a more developed tectonic fabric is found: the k<inf>min</inf> axes are not completely perpendicular to bedding, and the magnetic susceptibility ellipsoid relates to the foliation plane. Different minerals carry a concordant magnetic fabric with pyrrhotite, magnetite (ferromagnetic s.l.) and phyllosilicates (paramagnetic), and little influence of calcite grains (diamagnetic). The magnetic fabric is interpreted to form at the early stages of the Variscan deformation, prior to the dextral transpression synchronous with granite emplacement that characterizes the late stages of the Variscan Orogeny. However, contact metamorphism and associated fluid circulation can enhance or obliterate the primary magnetic fabric.Field work and thin section preparation was possible thanks to the “Ayuda a la Investigación de la Comarca de Sobrarbe” and National Project CGL 2017-90632-REDT. Project PID 2019-108753 GB-C22, funded by MICIN/AEI/10.3039/501100011033 and by “ERDF A way of making Europe” is also aknowledged. Proyecto del Gobierno de Aragón (E32_20R: Grupo de Investigación Geotransfer).Peer reviewedElsevierAgencia Estatal de Investigación (España)Gobierno de AragónOliva-Urcia, Belén [0000-0003-1563-6434]Román-Berdiel, T. [0000-0002-9743-8695]Clariana, Pilar [0000-0002-4168-2744]Soto, Ruth [0000-0002-1929-8850]Izquierdo Llavall, Esther [0000-0002-3102-8001]Casas-Sainz, Antonio M. [0000-0003-3652-3527]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/10261/403559https://api.elsevier.com/content/abstract/scopus_id/105009415626reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement///CGL 2017-90632info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-108753GB-C22https://doi.org/10.1016/j.jsg.2025.105495Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4035592026-05-22T06:33:51Z
dc.title.none.fl_str_mv Deformation and magnetic fabrics in isoclinal folds of the Variscan Pyrenees
title Deformation and magnetic fabrics in isoclinal folds of the Variscan Pyrenees
spellingShingle Deformation and magnetic fabrics in isoclinal folds of the Variscan Pyrenees
Oliva-Urcia, Belén
Variscan
Alpine
Anisotropy of magnetic susceptibility
Isocline folds
Limestones
Pyrenees
title_short Deformation and magnetic fabrics in isoclinal folds of the Variscan Pyrenees
title_full Deformation and magnetic fabrics in isoclinal folds of the Variscan Pyrenees
title_fullStr Deformation and magnetic fabrics in isoclinal folds of the Variscan Pyrenees
title_full_unstemmed Deformation and magnetic fabrics in isoclinal folds of the Variscan Pyrenees
title_sort Deformation and magnetic fabrics in isoclinal folds of the Variscan Pyrenees
dc.creator.none.fl_str_mv Oliva-Urcia, Belén
Román-Berdiel, T.
Clariana, Pilar
Soto, Ruth
Izquierdo Llavall, Esther
Casas-Sainz, Antonio M.
author Oliva-Urcia, Belén
author_facet Oliva-Urcia, Belén
Román-Berdiel, T.
Clariana, Pilar
Soto, Ruth
Izquierdo Llavall, Esther
Casas-Sainz, Antonio M.
author_role author
author2 Román-Berdiel, T.
Clariana, Pilar
Soto, Ruth
Izquierdo Llavall, Esther
Casas-Sainz, Antonio M.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Agencia Estatal de Investigación (España)
Gobierno de Aragón
Oliva-Urcia, Belén [0000-0003-1563-6434]
Román-Berdiel, T. [0000-0002-9743-8695]
Clariana, Pilar [0000-0002-4168-2744]
Soto, Ruth [0000-0002-1929-8850]
Izquierdo Llavall, Esther [0000-0002-3102-8001]
Casas-Sainz, Antonio M. [0000-0003-3652-3527]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Variscan
Alpine
Anisotropy of magnetic susceptibility
Isocline folds
Limestones
Pyrenees
topic Variscan
Alpine
Anisotropy of magnetic susceptibility
Isocline folds
Limestones
Pyrenees
description 23 p.
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/10261/403559
https://api.elsevier.com/content/abstract/scopus_id/105009415626
url http://hdl.handle.net/10261/403559
https://api.elsevier.com/content/abstract/scopus_id/105009415626
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#
info:eu-repo/grantAgreement///CGL 2017-90632
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-108753GB-C22
https://doi.org/10.1016/j.jsg.2025.105495
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 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
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