Geometry and kinematics of the Fuegian thrust-fold belt, southernmost Andes

Autores
Torres Carbonell, Pablo Juan; Rodríguez Arias, Leonardo; Atencio, Mario R.
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Published balanced structural interpretations of the Fuegian thrust-fold belt (southernmost Andes) fail to address aspects such as basement shortening in the thrust-fold belt or its structural connection with the central belt of the orogen. We tackle this deficiency by constructing four serial balanced cross sections based on surface geologic information, 2-D reflection seismic lines, and well logs, which depict the first-order structural geometry and kinematics from the thrust front to the internal thrust-fold belt. The interpretation reveals three main tectonostratigraphic packages separated by major detachments: basement (Paleozoic-Upper Jurassic), Cretaceous, and Paleogene, all variably involved in thrusting along strike. Minimum shortening in the Paleogene cover ranges between 16% and 43%, and significant style changes are observed across and along the thrust wedge. We show that basement thrust sheets have a major role in the construction of the thrust-fold belt; some of them were emplaced below the thrust front during late Oligocene or early Miocene times. The kinematic evolution of the thrust-fold belt indicates that the active detachments depended on the existence of high pore pressure to propagate forward. Our model shows that this pore pressure buildup was controlled by overburden, mean rock impermeability, and strain rate; the variable interaction among these factors controlled the propagation and style of the thrust wedge.
Fil: Torres Carbonell, Pablo Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Rodríguez Arias, Leonardo. Ypf S. A.; Argentina
Fil: Atencio, Mario R.. Ypf S. A.; Argentina
Materia
AUSTRAL-MAGALLANES BASIN
BASEMENT THRUST SHEET
FUEGIAN ANDES
OVERPRESSURED DETACHMENT
SHORTENING
STRUCTURAL STYLE
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/63344

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network_name_str CONICET Digital (CONICET)
spelling Geometry and kinematics of the Fuegian thrust-fold belt, southernmost AndesTorres Carbonell, Pablo JuanRodríguez Arias, LeonardoAtencio, Mario R.AUSTRAL-MAGALLANES BASINBASEMENT THRUST SHEETFUEGIAN ANDESOVERPRESSURED DETACHMENTSHORTENINGSTRUCTURAL STYLEhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Published balanced structural interpretations of the Fuegian thrust-fold belt (southernmost Andes) fail to address aspects such as basement shortening in the thrust-fold belt or its structural connection with the central belt of the orogen. We tackle this deficiency by constructing four serial balanced cross sections based on surface geologic information, 2-D reflection seismic lines, and well logs, which depict the first-order structural geometry and kinematics from the thrust front to the internal thrust-fold belt. The interpretation reveals three main tectonostratigraphic packages separated by major detachments: basement (Paleozoic-Upper Jurassic), Cretaceous, and Paleogene, all variably involved in thrusting along strike. Minimum shortening in the Paleogene cover ranges between 16% and 43%, and significant style changes are observed across and along the thrust wedge. We show that basement thrust sheets have a major role in the construction of the thrust-fold belt; some of them were emplaced below the thrust front during late Oligocene or early Miocene times. The kinematic evolution of the thrust-fold belt indicates that the active detachments depended on the existence of high pore pressure to propagate forward. Our model shows that this pore pressure buildup was controlled by overburden, mean rock impermeability, and strain rate; the variable interaction among these factors controlled the propagation and style of the thrust wedge.Fil: Torres Carbonell, Pablo Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Rodríguez Arias, Leonardo. Ypf S. A.; ArgentinaFil: Atencio, Mario R.. Ypf S. A.; ArgentinaAmerican Geophysical Union2017-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/63344Torres Carbonell, Pablo Juan; Rodríguez Arias, Leonardo; Atencio, Mario R.; Geometry and kinematics of the Fuegian thrust-fold belt, southernmost Andes; American Geophysical Union; Tectonics; 36; 1; 1-2017; 33-500278-7407CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1002/2016TC004349info:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2016TC004349info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:09:33Zoai:ri.conicet.gov.ar:11336/63344instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:09:34.001CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Geometry and kinematics of the Fuegian thrust-fold belt, southernmost Andes
title Geometry and kinematics of the Fuegian thrust-fold belt, southernmost Andes
spellingShingle Geometry and kinematics of the Fuegian thrust-fold belt, southernmost Andes
Torres Carbonell, Pablo Juan
AUSTRAL-MAGALLANES BASIN
BASEMENT THRUST SHEET
FUEGIAN ANDES
OVERPRESSURED DETACHMENT
SHORTENING
STRUCTURAL STYLE
title_short Geometry and kinematics of the Fuegian thrust-fold belt, southernmost Andes
title_full Geometry and kinematics of the Fuegian thrust-fold belt, southernmost Andes
title_fullStr Geometry and kinematics of the Fuegian thrust-fold belt, southernmost Andes
title_full_unstemmed Geometry and kinematics of the Fuegian thrust-fold belt, southernmost Andes
title_sort Geometry and kinematics of the Fuegian thrust-fold belt, southernmost Andes
dc.creator.none.fl_str_mv Torres Carbonell, Pablo Juan
Rodríguez Arias, Leonardo
Atencio, Mario R.
author Torres Carbonell, Pablo Juan
author_facet Torres Carbonell, Pablo Juan
Rodríguez Arias, Leonardo
Atencio, Mario R.
author_role author
author2 Rodríguez Arias, Leonardo
Atencio, Mario R.
author2_role author
author
dc.subject.none.fl_str_mv AUSTRAL-MAGALLANES BASIN
BASEMENT THRUST SHEET
FUEGIAN ANDES
OVERPRESSURED DETACHMENT
SHORTENING
STRUCTURAL STYLE
topic AUSTRAL-MAGALLANES BASIN
BASEMENT THRUST SHEET
FUEGIAN ANDES
OVERPRESSURED DETACHMENT
SHORTENING
STRUCTURAL STYLE
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Published balanced structural interpretations of the Fuegian thrust-fold belt (southernmost Andes) fail to address aspects such as basement shortening in the thrust-fold belt or its structural connection with the central belt of the orogen. We tackle this deficiency by constructing four serial balanced cross sections based on surface geologic information, 2-D reflection seismic lines, and well logs, which depict the first-order structural geometry and kinematics from the thrust front to the internal thrust-fold belt. The interpretation reveals three main tectonostratigraphic packages separated by major detachments: basement (Paleozoic-Upper Jurassic), Cretaceous, and Paleogene, all variably involved in thrusting along strike. Minimum shortening in the Paleogene cover ranges between 16% and 43%, and significant style changes are observed across and along the thrust wedge. We show that basement thrust sheets have a major role in the construction of the thrust-fold belt; some of them were emplaced below the thrust front during late Oligocene or early Miocene times. The kinematic evolution of the thrust-fold belt indicates that the active detachments depended on the existence of high pore pressure to propagate forward. Our model shows that this pore pressure buildup was controlled by overburden, mean rock impermeability, and strain rate; the variable interaction among these factors controlled the propagation and style of the thrust wedge.
Fil: Torres Carbonell, Pablo Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Rodríguez Arias, Leonardo. Ypf S. A.; Argentina
Fil: Atencio, Mario R.. Ypf S. A.; Argentina
description Published balanced structural interpretations of the Fuegian thrust-fold belt (southernmost Andes) fail to address aspects such as basement shortening in the thrust-fold belt or its structural connection with the central belt of the orogen. We tackle this deficiency by constructing four serial balanced cross sections based on surface geologic information, 2-D reflection seismic lines, and well logs, which depict the first-order structural geometry and kinematics from the thrust front to the internal thrust-fold belt. The interpretation reveals three main tectonostratigraphic packages separated by major detachments: basement (Paleozoic-Upper Jurassic), Cretaceous, and Paleogene, all variably involved in thrusting along strike. Minimum shortening in the Paleogene cover ranges between 16% and 43%, and significant style changes are observed across and along the thrust wedge. We show that basement thrust sheets have a major role in the construction of the thrust-fold belt; some of them were emplaced below the thrust front during late Oligocene or early Miocene times. The kinematic evolution of the thrust-fold belt indicates that the active detachments depended on the existence of high pore pressure to propagate forward. Our model shows that this pore pressure buildup was controlled by overburden, mean rock impermeability, and strain rate; the variable interaction among these factors controlled the propagation and style of the thrust wedge.
publishDate 2017
dc.date.none.fl_str_mv 2017-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/63344
Torres Carbonell, Pablo Juan; Rodríguez Arias, Leonardo; Atencio, Mario R.; Geometry and kinematics of the Fuegian thrust-fold belt, southernmost Andes; American Geophysical Union; Tectonics; 36; 1; 1-2017; 33-50
0278-7407
CONICET Digital
CONICET
url http://hdl.handle.net/11336/63344
identifier_str_mv Torres Carbonell, Pablo Juan; Rodríguez Arias, Leonardo; Atencio, Mario R.; Geometry and kinematics of the Fuegian thrust-fold belt, southernmost Andes; American Geophysical Union; Tectonics; 36; 1; 1-2017; 33-50
0278-7407
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1002/2016TC004349
info:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2016TC004349
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
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:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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