Curved fold-and-thrust accretion during the extrusion of a synorogenic viscous allochthonous sheet: the Estepa Range (External Zones, Western Betic Cordillera, Spain)

Pedrera Parias, Antonio; Marín-Lechado, Carlos; Martos Rosillo, Sergio; Roldán García, Francisco Javier

Curved fold-and-thrust accretion during the extrusion of a synorogenic viscous allochthonous sheet: the Estepa Range (External Zones, Western Betic Cordillera, Spain)

New structural, borehole, and time domain electromagnetic data allow us to reconstruct the 3-D geometry of the Estepa range (External Zones of the Western Betic Cordillera), which constitutes an isolated curved fold-and-thrust range made up of Jurassic shallow marine carbonates and Cretaceous to Pal...

Descripción completa

Detalles Bibliográficos
Autores:	Pedrera Parias, Antonio, Marín-Lechado, Carlos, Martos Rosillo, Sergio, Roldán García, Francisco Javier
Tipo de recurso:	artículo
Fecha de publicación:	2012
País:	España
Institución:	Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:	DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:	oai:digital.csic.es:10261/277340
Acceso en línea:	http://hdl.handle.net/10261/277340 https://doi.org/10.1029/2012TC003119
Access Level:	acceso abierto
Palabra clave:	acreción aloctonía Zonas Externas Béticas España Jurásico Cretácico Paleoceno manto corrimiento pliegue Mioceno subducción flysch

id	ES_fc5df427622bd1ede0b9bf2f1cb7637d
oai_identifier_str	oai:digital.csic.es:10261/277340
network_acronym_str	ES
network_name_str	España
repository_id_str
spelling	Curved fold-and-thrust accretion during the extrusion of a synorogenic viscous allochthonous sheet: the Estepa Range (External Zones, Western Betic Cordillera, Spain)Pedrera Parias, AntonioMarín-Lechado, CarlosMartos Rosillo, SergioRoldán García, Francisco JavieracreciónaloctoníaZonas Externas BéticasEspañaJurásicoCretácicoPaleocenomanto corrimientopliegueMiocenosubducciónflyschNew structural, borehole, and time domain electromagnetic data allow us to reconstruct the 3-D geometry of the Estepa range (External Zones of the Western Betic Cordillera), which constitutes an isolated curved fold-and-thrust range made up of Jurassic shallow marine carbonates and Cretaceous to Paleocene marls and marly limestones. Contraction and rising load linked to the accretion of the Subbetic nappe enhanced the expulsion of Triassic evaporites and overpressured clays during the early and middle Miocene, finally forming part of a highly deformed mélange unit. This plastic extrusion favored the disconnection of External and Middle Subbetic blocks, including the Sierra de Estepa Range. There, deformation is characterized by northwest-vergent curved folds-and-thrusts associated with NE-SW frontal ramps and NW-SE lateral transfer faults that segmented the folds active between 18 and 12 Ma. At a local scale, curvature was achieved under a nearly uniform NW/WNW transport direction suggesting a primary arc type. Friction variation across the heterogeneous detached plastic basal Triassic unit mainly controlled the curvature and segmentation of the fold systems. Transport direction is consistent with previously published slip data from the Internal Subbetic and the Campo de Gibraltar units. After the Late Serravallian, accretion slowed down and a shallow marine unit deposited unconformably placed over the main thrust and folds. The sequence of deformation and emplacement of these ranges is interpreted as a continuous process linked to the early Miocene E continental collision of the Iberian margin thin continental crust and subduction of the Flysch trough oceanic crust beneath the Alboran continental domain.Instituto Geológico y Minero de España, EspañaAmerican Geophysical Union202220222012info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/277340https://doi.org/10.1029/2012TC003119reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#CSD2006–00041CGL2010– 21048CGL-2008-03474-E,CGL-2010-15498CGL-2011-29920P09-RNM-5388https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2012TC003119info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2773402026-05-22T06:33:51Z
dc.title.none.fl_str_mv	Curved fold-and-thrust accretion during the extrusion of a synorogenic viscous allochthonous sheet: the Estepa Range (External Zones, Western Betic Cordillera, Spain)
title	Curved fold-and-thrust accretion during the extrusion of a synorogenic viscous allochthonous sheet: the Estepa Range (External Zones, Western Betic Cordillera, Spain)
spellingShingle	Curved fold-and-thrust accretion during the extrusion of a synorogenic viscous allochthonous sheet: the Estepa Range (External Zones, Western Betic Cordillera, Spain) Pedrera Parias, Antonio acreción aloctonía Zonas Externas Béticas España Jurásico Cretácico Paleoceno manto corrimiento pliegue Mioceno subducción flysch
title_short	Curved fold-and-thrust accretion during the extrusion of a synorogenic viscous allochthonous sheet: the Estepa Range (External Zones, Western Betic Cordillera, Spain)
title_full	Curved fold-and-thrust accretion during the extrusion of a synorogenic viscous allochthonous sheet: the Estepa Range (External Zones, Western Betic Cordillera, Spain)
title_fullStr	Curved fold-and-thrust accretion during the extrusion of a synorogenic viscous allochthonous sheet: the Estepa Range (External Zones, Western Betic Cordillera, Spain)
title_full_unstemmed	Curved fold-and-thrust accretion during the extrusion of a synorogenic viscous allochthonous sheet: the Estepa Range (External Zones, Western Betic Cordillera, Spain)
title_sort	Curved fold-and-thrust accretion during the extrusion of a synorogenic viscous allochthonous sheet: the Estepa Range (External Zones, Western Betic Cordillera, Spain)
dc.creator.none.fl_str_mv	Pedrera Parias, Antonio Marín-Lechado, Carlos Martos Rosillo, Sergio Roldán García, Francisco Javier
author	Pedrera Parias, Antonio
author_facet	Pedrera Parias, Antonio Marín-Lechado, Carlos Martos Rosillo, Sergio Roldán García, Francisco Javier
author_role	author
author2	Marín-Lechado, Carlos Martos Rosillo, Sergio Roldán García, Francisco Javier
author2_role	author author author
dc.subject.none.fl_str_mv	acreción aloctonía Zonas Externas Béticas España Jurásico Cretácico Paleoceno manto corrimiento pliegue Mioceno subducción flysch
topic	acreción aloctonía Zonas Externas Béticas España Jurásico Cretácico Paleoceno manto corrimiento pliegue Mioceno subducción flysch
description	New structural, borehole, and time domain electromagnetic data allow us to reconstruct the 3-D geometry of the Estepa range (External Zones of the Western Betic Cordillera), which constitutes an isolated curved fold-and-thrust range made up of Jurassic shallow marine carbonates and Cretaceous to Paleocene marls and marly limestones. Contraction and rising load linked to the accretion of the Subbetic nappe enhanced the expulsion of Triassic evaporites and overpressured clays during the early and middle Miocene, finally forming part of a highly deformed mélange unit. This plastic extrusion favored the disconnection of External and Middle Subbetic blocks, including the Sierra de Estepa Range. There, deformation is characterized by northwest-vergent curved folds-and-thrusts associated with NE-SW frontal ramps and NW-SE lateral transfer faults that segmented the folds active between 18 and 12 Ma. At a local scale, curvature was achieved under a nearly uniform NW/WNW transport direction suggesting a primary arc type. Friction variation across the heterogeneous detached plastic basal Triassic unit mainly controlled the curvature and segmentation of the fold systems. Transport direction is consistent with previously published slip data from the Internal Subbetic and the Campo de Gibraltar units. After the Late Serravallian, accretion slowed down and a shallow marine unit deposited unconformably placed over the main thrust and folds. The sequence of deformation and emplacement of these ranges is interpreted as a continuous process linked to the early Miocene E continental collision of the Iberian margin thin continental crust and subduction of the Flysch trough oceanic crust beneath the Alboran continental domain.
publishDate	2012
dc.date.none.fl_str_mv	2012 2022 2022
dc.type.none.fl_str_mv	info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501
format	article
dc.identifier.none.fl_str_mv	http://hdl.handle.net/10261/277340 https://doi.org/10.1029/2012TC003119
url	http://hdl.handle.net/10261/277340 https://doi.org/10.1029/2012TC003119
dc.language.none.fl_str_mv	Inglés
language_invalid_str_mv	Inglés
dc.relation.none.fl_str_mv	#PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# CSD2006–00041 CGL2010– 21048 CGL-2008-03474-E, CGL-2010-15498 CGL-2011-29920 P09-RNM-5388 https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2012TC003119
dc.rights.none.fl_str_mv	info:eu-repo/semantics/openAccess
eu_rights_str_mv	openAccess
dc.publisher.none.fl_str_mv	American Geophysical Union
publisher.none.fl_str_mv	American Geophysical Union
dc.source.none.fl_str_mv	reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str	Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str	DIGITAL.CSIC. Repositorio Institucional del CSIC
collection	DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_	1869425415999717376
score	15.812429

Curved fold-and-thrust accretion during the extrusion of a synorogenic viscous allochthonous sheet: the Estepa Range (External Zones, Western Betic Cordillera, Spain)

Similares en LA Referencia