Numerical modelling of inversion tectonics in fold-and-thrust belts

This work presents numerical experiments of inversion of rift basins and consequent sub-thrust imbrication in tectonic wedges. Half-graben basins initially develop and then are covered with a post-rift sequence bearing a décollement-prone horizon (i.e., the upper décollement). A total of twelve mode...

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Detalhes bibliográficos
Autores: Granado, Pablo, Ruh, J.B.
Tipo de documento: artigo
Estado:Versión aceptada para publicación
Data de publicação:2019
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositório:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/193939
Acesso em linha:https://hdl.handle.net/2445/193939
Access Level:Acceso aberto
Palavra-chave:Tectònica
Geologia estructural
Tectonics
Structural geology
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spelling Numerical modelling of inversion tectonics in fold-and-thrust beltsGranado, PabloRuh, J.B.TectònicaGeologia estructuralTectonicsStructural geologyThis work presents numerical experiments of inversion of rift basins and consequent sub-thrust imbrication in tectonic wedges. Half-graben basins initially develop and then are covered with a post-rift sequence bearing a décollement-prone horizon (i.e., the upper décollement). A total of twelve models of tectonic inversion have been conducted varying (i) the strength of inherited extensional fault arrays and (ii) applying different fluid pressure ratios (i.e., strength) within syn-rift strata. Combinations of those were simulated using different internal angles of friction for the inherited faults, different strengths for the syn-rift infill and for the upper décollement. Results show that changes in relative strength between inherited faults, syn-rift deposits and the upper crustal décollement leads to important variations in structural styles. Weak faults systematically favour the compressional reactivation of inherited extensional faults. Weak syn-rift sediments favour hanging wall by-pass structures instead of fault reactivation and less internal deformation of the syn-rift deposits. Weak upper décollements supports the accretion of basement in a hinterland antiformal stack, decoupling of basement and cover, and forward tectonic transport of rift basins. Strong upper crustal décollements favours basement and cover coupling, can lead to fault reactivation in the absence of weak faults and syn-rift sediments, however combinations of weak faults and strong upper décollement shows fault reactivation, weak syn-rift sediments and strong upper décollement form hanging wall by-pass structures. Modelling results are compared to natural case studies.Elsevier B.V.2023202320192023info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion47 p.application/pdfapplication/pdfhttps://hdl.handle.net/2445/193939Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: https://doi.org/10.1016/j.tecto.2019.04.033Tectonophysics, 2019, vol. 763, p. 14-29https://doi.org/10.1016/j.tecto.2019.04.033cc-by-nc-nd (c) Elsevier B.V., 2019https://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1939392026-05-29T05:05:01Z
dc.title.none.fl_str_mv Numerical modelling of inversion tectonics in fold-and-thrust belts
title Numerical modelling of inversion tectonics in fold-and-thrust belts
spellingShingle Numerical modelling of inversion tectonics in fold-and-thrust belts
Granado, Pablo
Tectònica
Geologia estructural
Tectonics
Structural geology
title_short Numerical modelling of inversion tectonics in fold-and-thrust belts
title_full Numerical modelling of inversion tectonics in fold-and-thrust belts
title_fullStr Numerical modelling of inversion tectonics in fold-and-thrust belts
title_full_unstemmed Numerical modelling of inversion tectonics in fold-and-thrust belts
title_sort Numerical modelling of inversion tectonics in fold-and-thrust belts
dc.creator.none.fl_str_mv Granado, Pablo
Ruh, J.B.
author Granado, Pablo
author_facet Granado, Pablo
Ruh, J.B.
author_role author
author2 Ruh, J.B.
author2_role author
dc.subject.none.fl_str_mv Tectònica
Geologia estructural
Tectonics
Structural geology
topic Tectònica
Geologia estructural
Tectonics
Structural geology
description This work presents numerical experiments of inversion of rift basins and consequent sub-thrust imbrication in tectonic wedges. Half-graben basins initially develop and then are covered with a post-rift sequence bearing a décollement-prone horizon (i.e., the upper décollement). A total of twelve models of tectonic inversion have been conducted varying (i) the strength of inherited extensional fault arrays and (ii) applying different fluid pressure ratios (i.e., strength) within syn-rift strata. Combinations of those were simulated using different internal angles of friction for the inherited faults, different strengths for the syn-rift infill and for the upper décollement. Results show that changes in relative strength between inherited faults, syn-rift deposits and the upper crustal décollement leads to important variations in structural styles. Weak faults systematically favour the compressional reactivation of inherited extensional faults. Weak syn-rift sediments favour hanging wall by-pass structures instead of fault reactivation and less internal deformation of the syn-rift deposits. Weak upper décollements supports the accretion of basement in a hinterland antiformal stack, decoupling of basement and cover, and forward tectonic transport of rift basins. Strong upper crustal décollements favours basement and cover coupling, can lead to fault reactivation in the absence of weak faults and syn-rift sediments, however combinations of weak faults and strong upper décollement shows fault reactivation, weak syn-rift sediments and strong upper décollement form hanging wall by-pass structures. Modelling results are compared to natural case studies.
publishDate 2019
dc.date.none.fl_str_mv 2019
2023
2023
2023
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://hdl.handle.net/2445/193939
url https://hdl.handle.net/2445/193939
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1016/j.tecto.2019.04.033
Tectonophysics, 2019, vol. 763, p. 14-29
https://doi.org/10.1016/j.tecto.2019.04.033
dc.rights.none.fl_str_mv cc-by-nc-nd (c) Elsevier B.V., 2019
https://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by-nc-nd (c) Elsevier B.V., 2019
https://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 47 p.
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.812429

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