Linked detachment folds, thrust faults, and salt diapirs: Observations and analog models

Contractional deformation in salt-bearing rifted- and convergent-margin settings often involves diapirism. Diapirs may predate the onset of shortening, such that they exert a pronounced influence on how contractional strain is accommodated, or they may be triggered by the shortening. Analog models h...

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Autores: Rowan, Mark G., Muñoz, J. A., Roca i Abella, Eduard, Ferrer García, J. Oriol (José Oriol), Santolaria, Pablo, Granado, Pablo, Snidero, Marco
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2022
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/183595
Acceso en línea:https://hdl.handle.net/2445/183595
Access Level:acceso abierto
Palabra clave:Tectònica salina
Falles (Geologia)
Mèxic
Tectonique du sel
Faults (Geology)
Mexico
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spelling Linked detachment folds, thrust faults, and salt diapirs: Observations and analog modelsRowan, Mark G.Muñoz, J. A.Roca i Abella, EduardFerrer García, J. Oriol (José Oriol)Santolaria, PabloGranado, PabloSnidero, MarcoTectònica salinaFalles (Geologia)MèxicTectonique du selFaults (Geology)MexicoContractional deformation in salt-bearing rifted- and convergent-margin settings often involves diapirism. Diapirs may predate the onset of shortening, such that they exert a pronounced influence on how contractional strain is accommodated, or they may be triggered by the shortening. Analog models have been used to help understand the interaction and evolution of detachment folds, thrust faults, and diapirs, but few surface or subsurface datasets provide adequate three-dimensional images to test and refine the experimental results. Here we use 3D depth-migrated seismic data from the Sureste Basin, offshore SE Mexico, to map two structures, one dominated by salt-cored anticlines and one characterized by thrust faults. Associated diapirs include both preand syncontractional stocks and walls. We show that although analog models in the literature nicely reproduce some of the seismic geometries, there are also apparent mismatches. Whereas models often generate decapitated diapirs and thrust-fault salients centered on the diapirs, such features are absent in the study area. Moreover, in contrast to model thrust faults that dip 20-45◦, faults in the study area are steeper, ranging from 50 to 75◦. We bring in observations from other salt basins to discuss these discrepancies, possible explanations, and suggestions for improving the applicability of models to nature.Elsevier Ltd2022info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://hdl.handle.net/2445/183595Articles 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.jsg.2022.104509Journal of Structural Geology, 2022, vol. 155, p. 104509https://doi.org/10.1016/j.jsg.2022.104509cc-by-nc-nd (c) Elsevier Ltd, 2022https://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1835952026-05-27T06:46:51Z
dc.title.none.fl_str_mv Linked detachment folds, thrust faults, and salt diapirs: Observations and analog models
title Linked detachment folds, thrust faults, and salt diapirs: Observations and analog models
spellingShingle Linked detachment folds, thrust faults, and salt diapirs: Observations and analog models
Rowan, Mark G.
Tectònica salina
Falles (Geologia)
Mèxic
Tectonique du sel
Faults (Geology)
Mexico
title_short Linked detachment folds, thrust faults, and salt diapirs: Observations and analog models
title_full Linked detachment folds, thrust faults, and salt diapirs: Observations and analog models
title_fullStr Linked detachment folds, thrust faults, and salt diapirs: Observations and analog models
title_full_unstemmed Linked detachment folds, thrust faults, and salt diapirs: Observations and analog models
title_sort Linked detachment folds, thrust faults, and salt diapirs: Observations and analog models
dc.creator.none.fl_str_mv Rowan, Mark G.
Muñoz, J. A.
Roca i Abella, Eduard
Ferrer García, J. Oriol (José Oriol)
Santolaria, Pablo
Granado, Pablo
Snidero, Marco
author Rowan, Mark G.
author_facet Rowan, Mark G.
Muñoz, J. A.
Roca i Abella, Eduard
Ferrer García, J. Oriol (José Oriol)
Santolaria, Pablo
Granado, Pablo
Snidero, Marco
author_role author
author2 Muñoz, J. A.
Roca i Abella, Eduard
Ferrer García, J. Oriol (José Oriol)
Santolaria, Pablo
Granado, Pablo
Snidero, Marco
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Tectònica salina
Falles (Geologia)
Mèxic
Tectonique du sel
Faults (Geology)
Mexico
topic Tectònica salina
Falles (Geologia)
Mèxic
Tectonique du sel
Faults (Geology)
Mexico
description Contractional deformation in salt-bearing rifted- and convergent-margin settings often involves diapirism. Diapirs may predate the onset of shortening, such that they exert a pronounced influence on how contractional strain is accommodated, or they may be triggered by the shortening. Analog models have been used to help understand the interaction and evolution of detachment folds, thrust faults, and diapirs, but few surface or subsurface datasets provide adequate three-dimensional images to test and refine the experimental results. Here we use 3D depth-migrated seismic data from the Sureste Basin, offshore SE Mexico, to map two structures, one dominated by salt-cored anticlines and one characterized by thrust faults. Associated diapirs include both preand syncontractional stocks and walls. We show that although analog models in the literature nicely reproduce some of the seismic geometries, there are also apparent mismatches. Whereas models often generate decapitated diapirs and thrust-fault salients centered on the diapirs, such features are absent in the study area. Moreover, in contrast to model thrust faults that dip 20-45◦, faults in the study area are steeper, ranging from 50 to 75◦. We bring in observations from other salt basins to discuss these discrepancies, possible explanations, and suggestions for improving the applicability of models to nature.
publishDate 2022
dc.date.none.fl_str_mv 2022
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/2445/183595
url https://hdl.handle.net/2445/183595
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.jsg.2022.104509
Journal of Structural Geology, 2022, vol. 155, p. 104509
https://doi.org/10.1016/j.jsg.2022.104509
dc.rights.none.fl_str_mv cc-by-nc-nd (c) Elsevier Ltd, 2022
https://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by-nc-nd (c) Elsevier Ltd, 2022
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 Ltd
publisher.none.fl_str_mv Elsevier Ltd
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
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score 15.300724

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