Mechanical stratigraphy influence on fault-related folds development: Insights from the Cantabrian Zone (NW Iberian Peninsula)

[EN] An excellently exposed outcrop of Carboniferous rocks in the Cantabrian Zone (Variscan foreland fold-thrust belt in NW Iberia) displays fault-bend, fault-propagation and detachment folds. To unravel the parameters that controlled their development, we constructed detailed cross-sections and ana...

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Detalhes bibliográficos
Autores: Bulnes Cudeiro, María Teresa, Poblet Esplugas, Josep, Uzkeda Apesteguia, Hodei, Rodríguez Álvarez, Indira
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2019
País:España
Recursos:Universidad de León
Repositorio:BULERIA. Repositorio Institucional de la Universidad de León
OAI Identifier:oai:buleria.unileon.es:10612/26779
Acesso em linha:https://www.sciencedirect.com/science/article/pii/S0191814118302293
https://hdl.handle.net/10612/26779
Access Level:acceso abierto
Palavra-chave:Geología
Cantabrian zone
Carboniferous griotte limestones
Detachment folds
Fault-bend folds
Fault-propagation folds
Mechanical stratigraphy
2506.20 Geología Estructural
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spelling Mechanical stratigraphy influence on fault-related folds development: Insights from the Cantabrian Zone (NW Iberian Peninsula)Bulnes Cudeiro, María TeresaPoblet Esplugas, JosepUzkeda Apesteguia, HodeiRodríguez Álvarez, IndiraGeologíaCantabrian zoneCarboniferous griotte limestonesDetachment foldsFault-bend foldsFault-propagation foldsMechanical stratigraphy2506.20 Geología Estructural[EN] An excellently exposed outcrop of Carboniferous rocks in the Cantabrian Zone (Variscan foreland fold-thrust belt in NW Iberia) displays fault-bend, fault-propagation and detachment folds. To unravel the parameters that controlled their development, we constructed detailed cross-sections and analysed them. Detachment folds exhibit the greatest amounts of layer-parallel/bulk strain, forelimb dip and forelimb/hinge thickening and the lowest interlimb angle, whereas fault-bend folds have the lowest values except for the interlimb angle, with fault-propagation folds exhibiting intermediate values. The forelimbs of all these folds show some strain and thickening, and the detachment folds also show thickening and strain in the hinge area. Mechanical stratigraphy was determined to be the main controlling factor on the fold/thrust style; ramp folds developed in thick-bedded, isotropic, relatively strong and brittle rocks, whereas detachment folds developed in a thin-bedded, anisotropic, relatively weak and ductile unit. Competent rocks and smooth bedding surfaces induced fault-bend folding, whereas less competent and rough bedding surfaces favoured fault-propagation folding. The main detachments are located at the boundaries between mechanical units with substantial changes in their mechanical properties. The size of the structures depends on the occurrence of a basal detachment, variety of lithologies with different competences and smoothness of bedding surfacesSIWe would like to acknowledge financial support by research project CGL 2015-66997-R (“Aplicación del análisis del plegamiento a la investigación de recursos geológicos” -AAPLIREGE-) funded by the Spanish Ministry for Economy and Competitivity and the European Fund for Regional Development (FEDER). H. Uzkeda work has been partly supported by research contract CN-16-014 (“Convenio específico para la realización de un trabajo de investigación post-doctoral en la disciplina de Geología”) and I. Rodríguez-Álvarez work has been partly supported by research contract CN-016-15 (“Convenio específico para la realización de una tesis doctoral en la línea de investigación en Geología y Geosistemas del programa de doctorado en Biogeociencias”), both under the framework agreement between Repsol Exploración S.A. and the University of Oviedo. We thank Midland Valley for permission to use the software Move (Academic site software license and support agreement number 1915). Richard Allmendinger and Nestor Cardozo are thanked for permission to use their software Stereonet. We thank the editor I. Alsop, J.L. Alonso, M. Masini, F. Bastida, L.P. Fernández and an anonymous reviewer for their scientific contribution, J.G. Antuña for maintaining the software for structural interpretation and modelling, and I. Moriano for assisting us during one field campaignElsevierGeodinamica ExternaFacultad de Ciencias Biologicas y Ambientales2019info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionhttps://www.sciencedirect.com/science/article/pii/S0191814118302293https://hdl.handle.net/10612/26779reponame:BULERIA. Repositorio Institucional de la Universidad de Leóninstname:Universidad de LeónInglésinfo:eu-repo/grantAgreement/MINECO/Programa Estatal de I+D+I Orientada a los Retos de la Sociedad/CGL2015-66997-Rhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:buleria.unileon.es:10612/267792026-06-24T12:43:27Z
dc.title.none.fl_str_mv Mechanical stratigraphy influence on fault-related folds development: Insights from the Cantabrian Zone (NW Iberian Peninsula)
title Mechanical stratigraphy influence on fault-related folds development: Insights from the Cantabrian Zone (NW Iberian Peninsula)
spellingShingle Mechanical stratigraphy influence on fault-related folds development: Insights from the Cantabrian Zone (NW Iberian Peninsula)
Bulnes Cudeiro, María Teresa
Geología
Cantabrian zone
Carboniferous griotte limestones
Detachment folds
Fault-bend folds
Fault-propagation folds
Mechanical stratigraphy
2506.20 Geología Estructural
title_short Mechanical stratigraphy influence on fault-related folds development: Insights from the Cantabrian Zone (NW Iberian Peninsula)
title_full Mechanical stratigraphy influence on fault-related folds development: Insights from the Cantabrian Zone (NW Iberian Peninsula)
title_fullStr Mechanical stratigraphy influence on fault-related folds development: Insights from the Cantabrian Zone (NW Iberian Peninsula)
title_full_unstemmed Mechanical stratigraphy influence on fault-related folds development: Insights from the Cantabrian Zone (NW Iberian Peninsula)
title_sort Mechanical stratigraphy influence on fault-related folds development: Insights from the Cantabrian Zone (NW Iberian Peninsula)
dc.creator.none.fl_str_mv Bulnes Cudeiro, María Teresa
Poblet Esplugas, Josep
Uzkeda Apesteguia, Hodei
Rodríguez Álvarez, Indira
author Bulnes Cudeiro, María Teresa
author_facet Bulnes Cudeiro, María Teresa
Poblet Esplugas, Josep
Uzkeda Apesteguia, Hodei
Rodríguez Álvarez, Indira
author_role author
author2 Poblet Esplugas, Josep
Uzkeda Apesteguia, Hodei
Rodríguez Álvarez, Indira
author2_role author
author
author
dc.contributor.none.fl_str_mv Geodinamica Externa
Facultad de Ciencias Biologicas y Ambientales
dc.subject.none.fl_str_mv Geología
Cantabrian zone
Carboniferous griotte limestones
Detachment folds
Fault-bend folds
Fault-propagation folds
Mechanical stratigraphy
2506.20 Geología Estructural
topic Geología
Cantabrian zone
Carboniferous griotte limestones
Detachment folds
Fault-bend folds
Fault-propagation folds
Mechanical stratigraphy
2506.20 Geología Estructural
description [EN] An excellently exposed outcrop of Carboniferous rocks in the Cantabrian Zone (Variscan foreland fold-thrust belt in NW Iberia) displays fault-bend, fault-propagation and detachment folds. To unravel the parameters that controlled their development, we constructed detailed cross-sections and analysed them. Detachment folds exhibit the greatest amounts of layer-parallel/bulk strain, forelimb dip and forelimb/hinge thickening and the lowest interlimb angle, whereas fault-bend folds have the lowest values except for the interlimb angle, with fault-propagation folds exhibiting intermediate values. The forelimbs of all these folds show some strain and thickening, and the detachment folds also show thickening and strain in the hinge area. Mechanical stratigraphy was determined to be the main controlling factor on the fold/thrust style; ramp folds developed in thick-bedded, isotropic, relatively strong and brittle rocks, whereas detachment folds developed in a thin-bedded, anisotropic, relatively weak and ductile unit. Competent rocks and smooth bedding surfaces induced fault-bend folding, whereas less competent and rough bedding surfaces favoured fault-propagation folding. The main detachments are located at the boundaries between mechanical units with substantial changes in their mechanical properties. The size of the structures depends on the occurrence of a basal detachment, variety of lithologies with different competences and smoothness of bedding surfaces
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://www.sciencedirect.com/science/article/pii/S0191814118302293
https://hdl.handle.net/10612/26779
url https://www.sciencedirect.com/science/article/pii/S0191814118302293
https://hdl.handle.net/10612/26779
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MINECO/Programa Estatal de I+D+I Orientada a los Retos de la Sociedad/CGL2015-66997-R
dc.rights.none.fl_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
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:BULERIA. Repositorio Institucional de la Universidad de León
instname:Universidad de León
instname_str Universidad de León
reponame_str BULERIA. Repositorio Institucional de la Universidad de León
collection BULERIA. Repositorio Institucional de la Universidad de León
repository.name.fl_str_mv
repository.mail.fl_str_mv
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