Physical modelling of the interplay between salt-detached gravity gliding and spreading across complex rift topography, Santos Basin, offshore Brazil

The Santos Basin, offshore Brazil contains a complex set of salt-tectonic structures, the origins of which are debated, that is, the Albian Gap and the São Paulo Plateau (SPP). The Albian Gap is a ca. 450 km long, 60 km wide feature characterized by a post-Albian, counter-regional rollover overlying...

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Autores: Pichel, Leonardo M., Ferrer García, J. Oriol (José Oriol), Jackson, Christopher A.-L., Roca i Abella, Eduard
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2022
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/190771
Acceso en línea:https://hdl.handle.net/2445/190771
Access Level:acceso abierto
Palabra clave:Geologia estructural
Tectònica salina
Brasil
Structural geology
Tectonique du sel
Brazil
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spelling Physical modelling of the interplay between salt-detached gravity gliding and spreading across complex rift topography, Santos Basin, offshore BrazilPichel, Leonardo M.Ferrer García, J. Oriol (José Oriol)Jackson, Christopher A.-L.Roca i Abella, EduardGeologia estructuralTectònica salinaBrasilStructural geologyTectonique du selBrazilThe Santos Basin, offshore Brazil contains a complex set of salt-tectonic structures, the origins of which are debated, that is, the Albian Gap and the São Paulo Plateau (SPP). The Albian Gap is a ca. 450 km long, 60 km wide feature characterized by a post-Albian, counter-regional rollover overlying depleted Aptian salt, and in which the Albian is largely absent. The SPP, located immediately downdip, is defined by a pre-salt structural high overlain by ca. 2.5 km thick salt. Another prominent feature is the Merluza Graben, a rift-related depocentre that underlies the southern portion of the Albian Gap and displays significant (3-4 km) base-salt relief along its main faults. Two competing hypotheses have been proposed to explain the kinematics of these provinces. One invokes post-Albian extension in the Albian Gap and kinematically-linked contraction in the SPP. The other invokes post-Albian salt expulsion in the Albian Gap and salt inflation in the SPP. Recent studies, however, suggest these processes likely alternate in time and space, contributing nearly equally to the evolution of these domains. We apply 3D physical modelling to (i) test this hypothesis; and (ii) to more generally understand how gravity gliding and spreading over three-dimensionally variable base-salt relief control regional salt tectonics. The results show a similar salt-related evolution and structural styles to those proposed in the most recent studies. They also (i) explain the origin of the ca. 25 km wide diapir precursor of the Albian Gap by early salt inflation against base-salt steps; (ii) show that normal faults with different polarities and rollover types form due to the interplay between gliding and spreading over different base-salt domains and (iii) provide a mechanism for the origin of strata encased within salt structures. This improves our understanding of the distribution and origin of salt-related structural styles in worldwide salt basins.John Wiley & Sons2022202220222022info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion22 p.application/pdfhttps://hdl.handle.net/2445/190771Articles 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)InglésReproducció del document publicat a: https://doi.org/10.1111/bre.12695Basin Research, 2022https://doi.org/10.1111/bre.12695(c) The Authors, 2022http://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1907712026-05-29T05:05:01Z
dc.title.none.fl_str_mv Physical modelling of the interplay between salt-detached gravity gliding and spreading across complex rift topography, Santos Basin, offshore Brazil
title Physical modelling of the interplay between salt-detached gravity gliding and spreading across complex rift topography, Santos Basin, offshore Brazil
spellingShingle Physical modelling of the interplay between salt-detached gravity gliding and spreading across complex rift topography, Santos Basin, offshore Brazil
Pichel, Leonardo M.
Geologia estructural
Tectònica salina
Brasil
Structural geology
Tectonique du sel
Brazil
title_short Physical modelling of the interplay between salt-detached gravity gliding and spreading across complex rift topography, Santos Basin, offshore Brazil
title_full Physical modelling of the interplay between salt-detached gravity gliding and spreading across complex rift topography, Santos Basin, offshore Brazil
title_fullStr Physical modelling of the interplay between salt-detached gravity gliding and spreading across complex rift topography, Santos Basin, offshore Brazil
title_full_unstemmed Physical modelling of the interplay between salt-detached gravity gliding and spreading across complex rift topography, Santos Basin, offshore Brazil
title_sort Physical modelling of the interplay between salt-detached gravity gliding and spreading across complex rift topography, Santos Basin, offshore Brazil
dc.creator.none.fl_str_mv Pichel, Leonardo M.
Ferrer García, J. Oriol (José Oriol)
Jackson, Christopher A.-L.
Roca i Abella, Eduard
author Pichel, Leonardo M.
author_facet Pichel, Leonardo M.
Ferrer García, J. Oriol (José Oriol)
Jackson, Christopher A.-L.
Roca i Abella, Eduard
author_role author
author2 Ferrer García, J. Oriol (José Oriol)
Jackson, Christopher A.-L.
Roca i Abella, Eduard
author2_role author
author
author
dc.subject.none.fl_str_mv Geologia estructural
Tectònica salina
Brasil
Structural geology
Tectonique du sel
Brazil
topic Geologia estructural
Tectònica salina
Brasil
Structural geology
Tectonique du sel
Brazil
description The Santos Basin, offshore Brazil contains a complex set of salt-tectonic structures, the origins of which are debated, that is, the Albian Gap and the São Paulo Plateau (SPP). The Albian Gap is a ca. 450 km long, 60 km wide feature characterized by a post-Albian, counter-regional rollover overlying depleted Aptian salt, and in which the Albian is largely absent. The SPP, located immediately downdip, is defined by a pre-salt structural high overlain by ca. 2.5 km thick salt. Another prominent feature is the Merluza Graben, a rift-related depocentre that underlies the southern portion of the Albian Gap and displays significant (3-4 km) base-salt relief along its main faults. Two competing hypotheses have been proposed to explain the kinematics of these provinces. One invokes post-Albian extension in the Albian Gap and kinematically-linked contraction in the SPP. The other invokes post-Albian salt expulsion in the Albian Gap and salt inflation in the SPP. Recent studies, however, suggest these processes likely alternate in time and space, contributing nearly equally to the evolution of these domains. We apply 3D physical modelling to (i) test this hypothesis; and (ii) to more generally understand how gravity gliding and spreading over three-dimensionally variable base-salt relief control regional salt tectonics. The results show a similar salt-related evolution and structural styles to those proposed in the most recent studies. They also (i) explain the origin of the ca. 25 km wide diapir precursor of the Albian Gap by early salt inflation against base-salt steps; (ii) show that normal faults with different polarities and rollover types form due to the interplay between gliding and spreading over different base-salt domains and (iii) provide a mechanism for the origin of strata encased within salt structures. This improves our understanding of the distribution and origin of salt-related structural styles in worldwide salt basins.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022
2022
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/2445/190771
url https://hdl.handle.net/2445/190771
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1111/bre.12695
Basin Research, 2022
https://doi.org/10.1111/bre.12695
dc.rights.none.fl_str_mv (c) The Authors, 2022
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The Authors, 2022
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 22 p.
application/pdf
dc.publisher.none.fl_str_mv John Wiley & Sons
publisher.none.fl_str_mv John Wiley & Sons
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 15,81155

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