Fracture distribution in a folded fluvial succession: the Puig-reig anticline (South-eastern Pyrenees)

Sedimentary rocks of foreland fold-and-thrust belts typically undergo intensive fracturing as fold grows. The resulting fracture networks can present significant variations depending on the distribution of sedimentary facies and the complex structural characteristics of fold-and-thrust belts. The Pu...

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Autores: Sun, Xiaolong, Gómez-Rivas, Enrique, Alcalde, Juan, Martín-Martín, J. D., Ma, Cunfei, Muñoz-López, D., Cruset, David, Cantarero, Irene, Griera, Albert, Travé, A.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2021
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/243139
Acceso en línea:http://hdl.handle.net/10261/243139
Access Level:acceso abierto
Palabra clave:Fold
Pyrenees
Fluvial fan
Structural position
Fractures
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network_name_str España
repository_id_str
dc.title.none.fl_str_mv Fracture distribution in a folded fluvial succession: the Puig-reig anticline (South-eastern Pyrenees)
title Fracture distribution in a folded fluvial succession: the Puig-reig anticline (South-eastern Pyrenees)
spellingShingle Fracture distribution in a folded fluvial succession: the Puig-reig anticline (South-eastern Pyrenees)
Sun, Xiaolong
Fold
Pyrenees
Fluvial fan
Structural position
Fractures
title_short Fracture distribution in a folded fluvial succession: the Puig-reig anticline (South-eastern Pyrenees)
title_full Fracture distribution in a folded fluvial succession: the Puig-reig anticline (South-eastern Pyrenees)
title_fullStr Fracture distribution in a folded fluvial succession: the Puig-reig anticline (South-eastern Pyrenees)
title_full_unstemmed Fracture distribution in a folded fluvial succession: the Puig-reig anticline (South-eastern Pyrenees)
title_sort Fracture distribution in a folded fluvial succession: the Puig-reig anticline (South-eastern Pyrenees)
dc.creator.none.fl_str_mv Sun, Xiaolong
Gómez-Rivas, Enrique
Alcalde, Juan
Martín-Martín, J. D.
Ma, Cunfei
Muñoz-López, D.
Cruset, David
Cantarero, Irene
Griera, Albert
Travé, A.
author Sun, Xiaolong
author_facet Sun, Xiaolong
Gómez-Rivas, Enrique
Alcalde, Juan
Martín-Martín, J. D.
Ma, Cunfei
Muñoz-López, D.
Cruset, David
Cantarero, Irene
Griera, Albert
Travé, A.
author_role author
author2 Gómez-Rivas, Enrique
Alcalde, Juan
Martín-Martín, J. D.
Ma, Cunfei
Muñoz-López, D.
Cruset, David
Cantarero, Irene
Griera, Albert
Travé, A.
author2_role author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Generalitat de Catalunya
Ministerio de Ciencia, Innovación y Universidades (España)
Dirección General de Investigación Científica y Técnica, DGICT (España)
Alcalde, Juan [0000-0001-9806-5600]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Fold
Pyrenees
Fluvial fan
Structural position
Fractures
topic Fold
Pyrenees
Fluvial fan
Structural position
Fractures
description Sedimentary rocks of foreland fold-and-thrust belts typically undergo intensive fracturing as fold grows. The resulting fracture networks can present significant variations depending on the distribution of sedimentary facies and the complex structural characteristics of fold-and-thrust belts. The Puig-reig anticline, located in the south-eastern Pyrenees, mainly exposes proximal fluvial deposits in the north limb and medial fluvial deposits in the rest of the anticline. Thus, this anticline constitutes an excellent case study to investigate the main controls on the distribution of fracture networks in folded fluvial deposits, in terms of structural position and lithofacies variations. Outcrops were selected to be representative of different structural positions, from the fold hinge to its limbs, and of a variety of the main lithofacies, from proximal to medial fluvial deposits. Fracture data were acquired using the linear scanline method. Results indicate that the anticline is affected by four sets of fractures. The north limb is dominated by thick conglomerate bodies with interlayered sandstones deposited from unconfined flash floods and wide-shallow channel streams in the proximal fluvial fan, and presents large fracture spacing and low fracture intensity but relatively large fracture length and aperture. The crest and the crest-limb transition zones are mainly composed of interlayered conglomerates, sandstones, siltstones and clays, deposited from braided channel streams and overbanks in the medial fluvial fan and present fractures with relatively high fracture intensity and variable fracture length and aperture. The south limb, composed of channel filling sandstone layers and stable overbank fine deposits in the medial fluvial fan, is characterised by low fracture intensity and small fracture length and aperture. Based on multiple linear regression analysis, fracture intensity is mainly controlled by the structural position, bedding thickness and lithological associations, with relatively more intense fracturing in thin sandstone layers with multiple interlayers of fine deposits in the anticline crest. The fracture length is mainly controlled by bedding thickness and is affected lithological associations. The fracture apertures are mainly controlled by lithofacies, with relatively higher apertures affecting conglomerate bodies. The results of this study are relevant for characterising similar systems in the subsurface, where data is scarce.
publishDate 2021
dc.date.none.fl_str_mv 2021
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/243139
url http://hdl.handle.net/10261/243139
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/PGC2018-093903-B-C22
https://doi.org/10.1016/j.marpetgeo.2021.105169
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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spelling Fracture distribution in a folded fluvial succession: the Puig-reig anticline (South-eastern Pyrenees)Sun, XiaolongGómez-Rivas, EnriqueAlcalde, JuanMartín-Martín, J. D.Ma, CunfeiMuñoz-López, D.Cruset, DavidCantarero, IreneGriera, AlbertTravé, A.FoldPyreneesFluvial fanStructural positionFracturesSedimentary rocks of foreland fold-and-thrust belts typically undergo intensive fracturing as fold grows. The resulting fracture networks can present significant variations depending on the distribution of sedimentary facies and the complex structural characteristics of fold-and-thrust belts. The Puig-reig anticline, located in the south-eastern Pyrenees, mainly exposes proximal fluvial deposits in the north limb and medial fluvial deposits in the rest of the anticline. Thus, this anticline constitutes an excellent case study to investigate the main controls on the distribution of fracture networks in folded fluvial deposits, in terms of structural position and lithofacies variations. Outcrops were selected to be representative of different structural positions, from the fold hinge to its limbs, and of a variety of the main lithofacies, from proximal to medial fluvial deposits. Fracture data were acquired using the linear scanline method. Results indicate that the anticline is affected by four sets of fractures. The north limb is dominated by thick conglomerate bodies with interlayered sandstones deposited from unconfined flash floods and wide-shallow channel streams in the proximal fluvial fan, and presents large fracture spacing and low fracture intensity but relatively large fracture length and aperture. The crest and the crest-limb transition zones are mainly composed of interlayered conglomerates, sandstones, siltstones and clays, deposited from braided channel streams and overbanks in the medial fluvial fan and present fractures with relatively high fracture intensity and variable fracture length and aperture. The south limb, composed of channel filling sandstone layers and stable overbank fine deposits in the medial fluvial fan, is characterised by low fracture intensity and small fracture length and aperture. Based on multiple linear regression analysis, fracture intensity is mainly controlled by the structural position, bedding thickness and lithological associations, with relatively more intense fracturing in thin sandstone layers with multiple interlayers of fine deposits in the anticline crest. The fracture length is mainly controlled by bedding thickness and is affected lithological associations. The fracture apertures are mainly controlled by lithofacies, with relatively higher apertures affecting conglomerate bodies. The results of this study are relevant for characterising similar systems in the subsurface, where data is scarce.Funding was provided by the Catalan Council to the Grup Consolidat de Recerca “Geologia Sedimentària” (2017SGR-824) and the DGICYT Spanish Project PGC2018-093903-B-C22 (Ministerio de Ciencia, Innovación y Universidades/Agencia Estatal de Investigación/Fondo Europeo de Desarrollo Regional, Unión Europea). XS acknowledges funding by the China Scholarship Council for a PhD scholarship (201806450043). EGR acknowledges funding provided by the Spanish Ministry of Science, Innovation and Universities (“Ramón y Cajal” fellowship RYC2018-026335-I). JA is funded by MICINN (Juan de la Cierva fellowship - IJC2018-036074-I).Peer reviewedElsevierGeneralitat de CatalunyaMinisterio de Ciencia, Innovación y Universidades (España)Dirección General de Investigación Científica y Técnica, DGICT (España)Alcalde, Juan [0000-0001-9806-5600]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202120212021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/243139reponame: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/PGC2018-093903-B-C22https://doi.org/10.1016/j.marpetgeo.2021.105169Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2431392026-05-22T06:33:51Z
score 15,81155

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