Strain partitioning and localization due to detachment heterogeneities in fold-and-thrust belts of progressive arcs: results from analog modeling

Although most arcuate orogens are deformed as progressive arcs—curvature is acquired during shortening-, they have been scarcely simulated by analog modeling. To investigate factors that control the growth of progressive curves in fold-and-thrust belts, we developed seven analog models where the bac...

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Autores: Jiménez Bonilla, Alejandro, Expósito Ramos, Inmaculada, Díaz Azpiroz, Manuel, Balanyá Roure, Juan Carlos, Crespo-Blanc, Ana
Tipo de recurso: artículo
Fecha de publicación:2022
País:España
Institución:Universidad Pablo de Olavide (UPO)
Repositorio:RIO. Repositorio Institucional Olavide
Idioma:inglés
OAI Identifier:oai:rio.upo.es:10433/25492
Acceso en línea:https://hdl.handle.net/10433/25492
Access Level:acceso abierto
Palabra clave:Progressive arc
Analog experiments
Detachment heterogeneity
Strain partitioning
Fold-and-thrust belt
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spelling Strain partitioning and localization due to detachment heterogeneities in fold-and-thrust belts of progressive arcs: results from analog modelingJiménez Bonilla, AlejandroExpósito Ramos, InmaculadaDíaz Azpiroz, ManuelBalanyá Roure, Juan CarlosCrespo-Blanc, AnaProgressive arcAnalog experimentsDetachment heterogeneityStrain partitioningFold-and-thrust beltAlthough most arcuate orogens are deformed as progressive arcs—curvature is acquired during shortening-, they have been scarcely simulated by analog modeling. To investigate factors that control the growth of progressive curves in fold-and-thrust belts, we developed seven analog models where the backstop shape changed over time, and distinctive geometric heterogeneities were set in the detachment layer. These heterogeneities, often described in natural cases, include diapirs, thickness lateral variations (including pinch-outs) of the viscous detachment layer as well as frontal pinch-outs. Our results show that strain was partitioned between shortening structures showing radial transport directions, and both normal and oblique strike-slip faults that accommodated arc-lengthening. The location of any heterogeneity conditioned the nucleation of structures and thus, the wedge evolution and its resulting geometry. The presence of both diapirs and frontal silicone pinch-outs favored the stagnation of the deformation front, and the subsequent wedge thickening up to reach the supercritical angle. Both diapirs and thickness lateral variations of the viscous layer localized arc-parallel stretching. In addition, their configuration determined the amount and distribution of salients and recesses along the arcuate belt, diapirs and more frictional detachments favoring thicker wedges and less frontal propagation. The differential displacement between salients and recesses was accommodated by strongly partitioned transfer zones, localized by the boundaries between distinctive detachment domains. These results may be useful to investigate geometric and kinematic changes along natural progressive arcs such as the Gibraltar, Sulaiman and Zagros cases.American Geophysical Union20262026-01-1220222022-11-2920222022-11-29journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10433/25492reponame:RIO. Repositorio Institucional Olavideinstname:Universidad Pablo de Olavide (UPO)InglésengAgencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 PGC2018-100914-B-I00 ANALISIS MULTIDISCIPLINAR Y MULTIESCALA DE LOS MECANISMOS DE LOCALIZACION Y REPARTO DE LA DEFORMACION CORTICAL EN CONVERGENCIA OBLICUAopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-ShareAlike 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-sa/4.0/info:eu-repo/semantics/openAccessoai:rio.upo.es:10433/254922026-06-13T12:46:27Z
dc.title.none.fl_str_mv Strain partitioning and localization due to detachment heterogeneities in fold-and-thrust belts of progressive arcs: results from analog modeling
title Strain partitioning and localization due to detachment heterogeneities in fold-and-thrust belts of progressive arcs: results from analog modeling
spellingShingle Strain partitioning and localization due to detachment heterogeneities in fold-and-thrust belts of progressive arcs: results from analog modeling
Jiménez Bonilla, Alejandro
Progressive arc
Analog experiments
Detachment heterogeneity
Strain partitioning
Fold-and-thrust belt
title_short Strain partitioning and localization due to detachment heterogeneities in fold-and-thrust belts of progressive arcs: results from analog modeling
title_full Strain partitioning and localization due to detachment heterogeneities in fold-and-thrust belts of progressive arcs: results from analog modeling
title_fullStr Strain partitioning and localization due to detachment heterogeneities in fold-and-thrust belts of progressive arcs: results from analog modeling
title_full_unstemmed Strain partitioning and localization due to detachment heterogeneities in fold-and-thrust belts of progressive arcs: results from analog modeling
title_sort Strain partitioning and localization due to detachment heterogeneities in fold-and-thrust belts of progressive arcs: results from analog modeling
dc.creator.none.fl_str_mv Jiménez Bonilla, Alejandro
Expósito Ramos, Inmaculada
Díaz Azpiroz, Manuel
Balanyá Roure, Juan Carlos
Crespo-Blanc, Ana
author Jiménez Bonilla, Alejandro
author_facet Jiménez Bonilla, Alejandro
Expósito Ramos, Inmaculada
Díaz Azpiroz, Manuel
Balanyá Roure, Juan Carlos
Crespo-Blanc, Ana
author_role author
author2 Expósito Ramos, Inmaculada
Díaz Azpiroz, Manuel
Balanyá Roure, Juan Carlos
Crespo-Blanc, Ana
author2_role author
author
author
author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv Progressive arc
Analog experiments
Detachment heterogeneity
Strain partitioning
Fold-and-thrust belt
topic Progressive arc
Analog experiments
Detachment heterogeneity
Strain partitioning
Fold-and-thrust belt
description Although most arcuate orogens are deformed as progressive arcs—curvature is acquired during shortening-, they have been scarcely simulated by analog modeling. To investigate factors that control the growth of progressive curves in fold-and-thrust belts, we developed seven analog models where the backstop shape changed over time, and distinctive geometric heterogeneities were set in the detachment layer. These heterogeneities, often described in natural cases, include diapirs, thickness lateral variations (including pinch-outs) of the viscous detachment layer as well as frontal pinch-outs. Our results show that strain was partitioned between shortening structures showing radial transport directions, and both normal and oblique strike-slip faults that accommodated arc-lengthening. The location of any heterogeneity conditioned the nucleation of structures and thus, the wedge evolution and its resulting geometry. The presence of both diapirs and frontal silicone pinch-outs favored the stagnation of the deformation front, and the subsequent wedge thickening up to reach the supercritical angle. Both diapirs and thickness lateral variations of the viscous layer localized arc-parallel stretching. In addition, their configuration determined the amount and distribution of salients and recesses along the arcuate belt, diapirs and more frictional detachments favoring thicker wedges and less frontal propagation. The differential displacement between salients and recesses was accommodated by strongly partitioned transfer zones, localized by the boundaries between distinctive detachment domains. These results may be useful to investigate geometric and kinematic changes along natural progressive arcs such as the Gibraltar, Sulaiman and Zagros cases.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-11-29
2022
2022-11-29
2026
2026-01-12
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10433/25492
url https://hdl.handle.net/10433/25492
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 PGC2018-100914-B-I00 ANALISIS MULTIDISCIPLINAR Y MULTIESCALA DE LOS MECANISMOS DE LOCALIZACION Y REPARTO DE LA DEFORMACION CORTICAL EN CONVERGENCIA OBLICUA
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-ShareAlike 4.0 International
http://creativecommons.org/licenses/by-nc-sa/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-ShareAlike 4.0 International
http://creativecommons.org/licenses/by-nc-sa/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Geophysical Union
publisher.none.fl_str_mv American Geophysical Union
dc.source.none.fl_str_mv reponame:RIO. Repositorio Institucional Olavide
instname:Universidad Pablo de Olavide (UPO)
instname_str Universidad Pablo de Olavide (UPO)
reponame_str RIO. Repositorio Institucional Olavide
collection RIO. Repositorio Institucional Olavide
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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