Changes in dip and frictional properties of the basal detachment controlling orogenic wedge propagation and frontal collapse: The external central Betics case

Thin-skinned fold-and-thrust belts (FTBs) have been extensively studied through both field examples and modeling. The overall dynamics of FTBs are, therefore, well understood. One less understood aspect is the combined influence of across-strike changes in the detachment properties and the basement...

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Autores: Jiménez Bonilla, Alejandro, Torvela, T., Balanyá Roure, Juan Carlos, Expósito Ramos, Inmaculada, Díaz Azpiroz, Manuel
Tipo de recurso: artículo
Fecha de publicación:2016
País:España
Institución:Universidad Pablo de Olavide (UPO)
Repositorio:RIO. Repositorio Institucional Olavide
Idioma:inglés
OAI Identifier:oai:rio.upo.es:10433/22682
Acceso en línea:https://hdl.handle.net/10433/22682
Access Level:acceso abierto
Palabra clave:Basement topography
External orogenic wedges
Betic fold
Collapse
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spelling Changes in dip and frictional properties of the basal detachment controlling orogenic wedge propagation and frontal collapse: The external central Betics caseJiménez Bonilla, AlejandroTorvela, T.Balanyá Roure, Juan CarlosExpósito Ramos, InmaculadaDíaz Azpiroz, ManuelBasement topographyExternal orogenic wedgesBetic foldCollapseThin-skinned fold-and-thrust belts (FTBs) have been extensively studied through both field examples and modeling. The overall dynamics of FTBs are, therefore, well understood. One less understood aspect is the combined influence of across-strike changes in the detachment properties and the basement topography on the behavior of an orogenic wedge. In this paper, we use field data together with reflection seismic interpretation from the external zones of the central Betics FTB, southern Spain, to identify a significant increase in the wedge basal dip (a basement “threshold”) coinciding with the pinch-out of a weak substrate. This induced both changes to the wedge geometry and to the basal friction, which in turn influenced the wedge dynamics. The changing dynamics led to a transient “stagnation” of the FTB propagation, topographic buildup, and subsequent collapse of the FTB front. This in turn fed an important Langhian depocenter made up of mass transport deposits. Coevally with the FTB propagation, extension took place both parallel and perpendicular to the orogenic trend. This case study illustrates how across-strike changes in wedge basal properties can control the detailed behavior of a developing FTB front, but questions remain regarding the time-space interaction and relative importance of the basal parameters.AGU20252025-01-2420162016-11-2420162016-11-24journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10433/22682reponame:RIO. Repositorio Institucional Olavideinstname:Universidad Pablo de Olavide (UPO)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:rio.upo.es:10433/226822026-06-13T12:46:27Z
dc.title.none.fl_str_mv Changes in dip and frictional properties of the basal detachment controlling orogenic wedge propagation and frontal collapse: The external central Betics case
title Changes in dip and frictional properties of the basal detachment controlling orogenic wedge propagation and frontal collapse: The external central Betics case
spellingShingle Changes in dip and frictional properties of the basal detachment controlling orogenic wedge propagation and frontal collapse: The external central Betics case
Jiménez Bonilla, Alejandro
Basement topography
External orogenic wedges
Betic fold
Collapse
title_short Changes in dip and frictional properties of the basal detachment controlling orogenic wedge propagation and frontal collapse: The external central Betics case
title_full Changes in dip and frictional properties of the basal detachment controlling orogenic wedge propagation and frontal collapse: The external central Betics case
title_fullStr Changes in dip and frictional properties of the basal detachment controlling orogenic wedge propagation and frontal collapse: The external central Betics case
title_full_unstemmed Changes in dip and frictional properties of the basal detachment controlling orogenic wedge propagation and frontal collapse: The external central Betics case
title_sort Changes in dip and frictional properties of the basal detachment controlling orogenic wedge propagation and frontal collapse: The external central Betics case
dc.creator.none.fl_str_mv Jiménez Bonilla, Alejandro
Torvela, T.
Balanyá Roure, Juan Carlos
Expósito Ramos, Inmaculada
Díaz Azpiroz, Manuel
author Jiménez Bonilla, Alejandro
author_facet Jiménez Bonilla, Alejandro
Torvela, T.
Balanyá Roure, Juan Carlos
Expósito Ramos, Inmaculada
Díaz Azpiroz, Manuel
author_role author
author2 Torvela, T.
Balanyá Roure, Juan Carlos
Expósito Ramos, Inmaculada
Díaz Azpiroz, Manuel
author2_role author
author
author
author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv Basement topography
External orogenic wedges
Betic fold
Collapse
topic Basement topography
External orogenic wedges
Betic fold
Collapse
description Thin-skinned fold-and-thrust belts (FTBs) have been extensively studied through both field examples and modeling. The overall dynamics of FTBs are, therefore, well understood. One less understood aspect is the combined influence of across-strike changes in the detachment properties and the basement topography on the behavior of an orogenic wedge. In this paper, we use field data together with reflection seismic interpretation from the external zones of the central Betics FTB, southern Spain, to identify a significant increase in the wedge basal dip (a basement “threshold”) coinciding with the pinch-out of a weak substrate. This induced both changes to the wedge geometry and to the basal friction, which in turn influenced the wedge dynamics. The changing dynamics led to a transient “stagnation” of the FTB propagation, topographic buildup, and subsequent collapse of the FTB front. This in turn fed an important Langhian depocenter made up of mass transport deposits. Coevally with the FTB propagation, extension took place both parallel and perpendicular to the orogenic trend. This case study illustrates how across-strike changes in wedge basal properties can control the detailed behavior of a developing FTB front, but questions remain regarding the time-space interaction and relative importance of the basal parameters.
publishDate 2016
dc.date.none.fl_str_mv 2016
2016-11-24
2016
2016-11-24
2025
2025-01-24
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/10433/22682
url https://hdl.handle.net/10433/22682
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/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-NoDerivatives 4.0 International
http://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 AGU
publisher.none.fl_str_mv AGU
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 15,198674

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