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...

Descripción completa

Detalles Bibliográficos
Autores: Granado, Pablo, Ruh, J.B.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2019
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/193939
Acceso en línea:https://hdl.handle.net/2445/193939
Access Level:acceso abierto
Palabra clave:Tectònica
Geologia estructural
Tectonics
Structural geology
id ES_a874b0a10f93d2cfcfc59b15f5fac4bb
oai_identifier_str oai:diposit.ub.edu:2445/193939
network_acronym_str ES
network_name_str España
repository_id_str
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.2019info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://hdl.handle.net/2445/193939Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésVersió 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:diposit.ub.edu:2445/1939392026-05-27T06:46:51Z
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
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 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:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869415880987770880
score 15,300719

Similares en LA Referencia