Structure of the south-central Taiwan fold-and-thrust belt: Testing the viability of the model

A structural model is developed for the south-central Taiwan fold-and-thrust belt that shows consistency across an array of data types and marks an important step forward in the consideration of geological hazards and risks. Although there is general agreement about the regional scale geology of Tai...

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Autores: Brown, Dennis, Alvarez-Marrón, Joaquina, Camanni, Giovanni, Biete, Cristina, Kuo-Chen, Hao, Wu, Y. M.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/306798
Acceso en línea:http://hdl.handle.net/10261/306798
Access Level:acceso abierto
Palabra clave:Taiwan
Fold-and-thrust belt
Crystalline basement
Imbricate thrust system
Shortening
Fault reactivation
Seismicity
GPSTopography
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spelling Structure of the south-central Taiwan fold-and-thrust belt: Testing the viability of the modelBrown, DennisAlvarez-Marrón, JoaquinaCamanni, GiovanniBiete, CristinaKuo-Chen, HaoWu, Y. M.TaiwanFold-and-thrust beltCrystalline basementImbricate thrust systemShorteningFault reactivationSeismicityGPSTopographyA structural model is developed for the south-central Taiwan fold-and-thrust belt that shows consistency across an array of data types and marks an important step forward in the consideration of geological hazards and risks. Although there is general agreement about the regional scale geology of Taiwan, there are considerable differences in the structural interpretations of its western fold-and-thrust belt. In this paper, we bring together results of our previous studies and add new data and data analyses to develop a consistent 3D structural model for the south-central Taiwan fold-and-thrust belt that can explain key aspects of the seismicity, GPS, and topography data. We interpret the fold-and-thrust belt to be a west-verging, imbricate thrust system developed above a single basal thrust that is breached by ENE-striking faults that are inherited from the continental margin. These breaching faults are associated with ENE-striking transverse zones in the fold-and-thrust belt that are marked by changes in stratigraphy, structural style, strike and dip of the basal thrust, and uplift of the stratigraphic contacts. Along the eastern flank of the fold-and-thrust belt, metamorphic basement rocks are involved in the thrusting. Shortening estimates range from 15 km to >25 km. Much of the seismicity is taking place beneath the basal thrust, in the basement, along the flanks of basement highs and lows where strike-slip and transpressive fault types are common. There are systematic changes in GPS displacement vectors and strain rates across the transverse zones. Topography is higher in areas where basement is involved in the thrusting. The proposed structural model has depth and along-strike consistency, and can explain aspects of the distribution of seismicity, faults types, GPS displacement vectors and strain rates, and topography of the study area, and can therefore be considered a viable model.This publication if part of the I+D+i project PGC2018-094227-B-I00 financed by MCIN/AEI/ https://doi.org/10.13039/501100011033 and the Generalitat de Catalunya, grant/award number AGAUR 2017SGR1022.Peer reviewedElsevierMinisterio de Ciencia, Innovación y Universidades (España)Agencia Estatal de Investigación (España)Generalitat de CatalunyaConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2023202320222023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_dcae04bcPublisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/306798reponame: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/PGC2018-094227-B-I00http://dx.doi.org/10.1016/j.earscirev.2022.104094Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3067982026-05-22T06:33:51Z
dc.title.none.fl_str_mv Structure of the south-central Taiwan fold-and-thrust belt: Testing the viability of the model
title Structure of the south-central Taiwan fold-and-thrust belt: Testing the viability of the model
spellingShingle Structure of the south-central Taiwan fold-and-thrust belt: Testing the viability of the model
Brown, Dennis
Taiwan
Fold-and-thrust belt
Crystalline basement
Imbricate thrust system
Shortening
Fault reactivation
Seismicity
GPSTopography
title_short Structure of the south-central Taiwan fold-and-thrust belt: Testing the viability of the model
title_full Structure of the south-central Taiwan fold-and-thrust belt: Testing the viability of the model
title_fullStr Structure of the south-central Taiwan fold-and-thrust belt: Testing the viability of the model
title_full_unstemmed Structure of the south-central Taiwan fold-and-thrust belt: Testing the viability of the model
title_sort Structure of the south-central Taiwan fold-and-thrust belt: Testing the viability of the model
dc.creator.none.fl_str_mv Brown, Dennis
Alvarez-Marrón, Joaquina
Camanni, Giovanni
Biete, Cristina
Kuo-Chen, Hao
Wu, Y. M.
author Brown, Dennis
author_facet Brown, Dennis
Alvarez-Marrón, Joaquina
Camanni, Giovanni
Biete, Cristina
Kuo-Chen, Hao
Wu, Y. M.
author_role author
author2 Alvarez-Marrón, Joaquina
Camanni, Giovanni
Biete, Cristina
Kuo-Chen, Hao
Wu, Y. M.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia, Innovación y Universidades (España)
Agencia Estatal de Investigación (España)
Generalitat de Catalunya
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Taiwan
Fold-and-thrust belt
Crystalline basement
Imbricate thrust system
Shortening
Fault reactivation
Seismicity
GPSTopography
topic Taiwan
Fold-and-thrust belt
Crystalline basement
Imbricate thrust system
Shortening
Fault reactivation
Seismicity
GPSTopography
description A structural model is developed for the south-central Taiwan fold-and-thrust belt that shows consistency across an array of data types and marks an important step forward in the consideration of geological hazards and risks. Although there is general agreement about the regional scale geology of Taiwan, there are considerable differences in the structural interpretations of its western fold-and-thrust belt. In this paper, we bring together results of our previous studies and add new data and data analyses to develop a consistent 3D structural model for the south-central Taiwan fold-and-thrust belt that can explain key aspects of the seismicity, GPS, and topography data. We interpret the fold-and-thrust belt to be a west-verging, imbricate thrust system developed above a single basal thrust that is breached by ENE-striking faults that are inherited from the continental margin. These breaching faults are associated with ENE-striking transverse zones in the fold-and-thrust belt that are marked by changes in stratigraphy, structural style, strike and dip of the basal thrust, and uplift of the stratigraphic contacts. Along the eastern flank of the fold-and-thrust belt, metamorphic basement rocks are involved in the thrusting. Shortening estimates range from 15 km to >25 km. Much of the seismicity is taking place beneath the basal thrust, in the basement, along the flanks of basement highs and lows where strike-slip and transpressive fault types are common. There are systematic changes in GPS displacement vectors and strain rates across the transverse zones. Topography is higher in areas where basement is involved in the thrusting. The proposed structural model has depth and along-strike consistency, and can explain aspects of the distribution of seismicity, faults types, GPS displacement vectors and strain rates, and topography of the study area, and can therefore be considered a viable model.
publishDate 2022
dc.date.none.fl_str_mv 2022
2023
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_dcae04bc
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/306798
url http://hdl.handle.net/10261/306798
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/PGC2018-094227-B-I00
http://dx.doi.org/10.1016/j.earscirev.2022.104094
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
repository.name.fl_str_mv
repository.mail.fl_str_mv
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