Quaternary-active thrusts scarps tested as deformation markers by trishear models in the Southern Precordillera of Argentina

Autores
Vazquez, Fabricio Rodrigo; Costa, Carlos Horacio; Gardini, Carlos Enrique
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Scarps related to Quaternary-active thrust splays propagating in alluvial bajadas of the Southern Precordillera of Argentina (32°20′) were studied through detailed topographic surveys, in order to understand the reliability of these landforms as deformation markers at an outcrop scale. Geometric parameters of causative structures were used to constrain balanced cross-sections through trishear modelling for shortening estimation and also with the aim of comparing the predicted geometry of these models with the scarp profile. Shortening estimation through retro-deformation of scarps contours was also conducted as an alternative approach for calculating deformation affecting these alluvial surfaces. Results indicate that fold geometries predicted by trishear modelling do not fit with the present scarp shapes, suggesting modifications and slope angle decrease of the front limb. In order to match the modelled folds with the scarp profiles, it is necessary to place constraints to fault parameters, such as ramp angle and tip point position, not compatible with field observations. Trishear models predict shortening values 8 to 15 times larger than those obtained through line retrodeformation of scarp profiles. Therefore, scarp shapes at a mesoscopic scale in the study area, are not considered a reliable deformation marker for shortening estimation of propagating thrusts through an unconsolidated cover.
Fil: Vazquez, Fabricio Rodrigo. Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Departamento de Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis; Argentina
Fil: Costa, Carlos Horacio. Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Departamento de Geología; Argentina
Fil: Gardini, Carlos Enrique. Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Departamento de Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis; Argentina
Materia
Argentina
Precordillera
Quaternary Thrusts
Scarps
Trishear Models
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/60465
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Quaternary-active thrusts scarps tested as deformation markers by trishear models in the Southern Precordillera of ArgentinaVazquez, Fabricio RodrigoCosta, Carlos HoracioGardini, Carlos EnriqueArgentinaPrecordilleraQuaternary ThrustsScarpsTrishear Modelshttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Scarps related to Quaternary-active thrust splays propagating in alluvial bajadas of the Southern Precordillera of Argentina (32°20′) were studied through detailed topographic surveys, in order to understand the reliability of these landforms as deformation markers at an outcrop scale. Geometric parameters of causative structures were used to constrain balanced cross-sections through trishear modelling for shortening estimation and also with the aim of comparing the predicted geometry of these models with the scarp profile. Shortening estimation through retro-deformation of scarps contours was also conducted as an alternative approach for calculating deformation affecting these alluvial surfaces. Results indicate that fold geometries predicted by trishear modelling do not fit with the present scarp shapes, suggesting modifications and slope angle decrease of the front limb. In order to match the modelled folds with the scarp profiles, it is necessary to place constraints to fault parameters, such as ramp angle and tip point position, not compatible with field observations. Trishear models predict shortening values 8 to 15 times larger than those obtained through line retrodeformation of scarp profiles. Therefore, scarp shapes at a mesoscopic scale in the study area, are not considered a reliable deformation marker for shortening estimation of propagating thrusts through an unconsolidated cover.Fil: Vazquez, Fabricio Rodrigo. Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Departamento de Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis; ArgentinaFil: Costa, Carlos Horacio. Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Departamento de Geología; ArgentinaFil: Gardini, Carlos Enrique. Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Departamento de Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis; ArgentinaPergamon-Elsevier Science Ltd2017-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/60465Vazquez, Fabricio Rodrigo; Costa, Carlos Horacio; Gardini, Carlos Enrique; Quaternary-active thrusts scarps tested as deformation markers by trishear models in the Southern Precordillera of Argentina; Pergamon-Elsevier Science Ltd; Quaternary International; 438; 5-2017; 65-791040-6182CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.quaint.2016.06.020info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1040618216300404info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:51:28Zoai:ri.conicet.gov.ar:11336/60465instacron: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 09:51:29.084CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Quaternary-active thrusts scarps tested as deformation markers by trishear models in the Southern Precordillera of Argentina
title Quaternary-active thrusts scarps tested as deformation markers by trishear models in the Southern Precordillera of Argentina
spellingShingle Quaternary-active thrusts scarps tested as deformation markers by trishear models in the Southern Precordillera of Argentina
Vazquez, Fabricio Rodrigo
Argentina
Precordillera
Quaternary Thrusts
Scarps
Trishear Models
title_short Quaternary-active thrusts scarps tested as deformation markers by trishear models in the Southern Precordillera of Argentina
title_full Quaternary-active thrusts scarps tested as deformation markers by trishear models in the Southern Precordillera of Argentina
title_fullStr Quaternary-active thrusts scarps tested as deformation markers by trishear models in the Southern Precordillera of Argentina
title_full_unstemmed Quaternary-active thrusts scarps tested as deformation markers by trishear models in the Southern Precordillera of Argentina
title_sort Quaternary-active thrusts scarps tested as deformation markers by trishear models in the Southern Precordillera of Argentina
dc.creator.none.fl_str_mv Vazquez, Fabricio Rodrigo
Costa, Carlos Horacio
Gardini, Carlos Enrique
author Vazquez, Fabricio Rodrigo
author_facet Vazquez, Fabricio Rodrigo
Costa, Carlos Horacio
Gardini, Carlos Enrique
author_role author
author2 Costa, Carlos Horacio
Gardini, Carlos Enrique
author2_role author
author
dc.subject.none.fl_str_mv Argentina
Precordillera
Quaternary Thrusts
Scarps
Trishear Models
topic Argentina
Precordillera
Quaternary Thrusts
Scarps
Trishear Models
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Scarps related to Quaternary-active thrust splays propagating in alluvial bajadas of the Southern Precordillera of Argentina (32°20′) were studied through detailed topographic surveys, in order to understand the reliability of these landforms as deformation markers at an outcrop scale. Geometric parameters of causative structures were used to constrain balanced cross-sections through trishear modelling for shortening estimation and also with the aim of comparing the predicted geometry of these models with the scarp profile. Shortening estimation through retro-deformation of scarps contours was also conducted as an alternative approach for calculating deformation affecting these alluvial surfaces. Results indicate that fold geometries predicted by trishear modelling do not fit with the present scarp shapes, suggesting modifications and slope angle decrease of the front limb. In order to match the modelled folds with the scarp profiles, it is necessary to place constraints to fault parameters, such as ramp angle and tip point position, not compatible with field observations. Trishear models predict shortening values 8 to 15 times larger than those obtained through line retrodeformation of scarp profiles. Therefore, scarp shapes at a mesoscopic scale in the study area, are not considered a reliable deformation marker for shortening estimation of propagating thrusts through an unconsolidated cover.
Fil: Vazquez, Fabricio Rodrigo. Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Departamento de Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis; Argentina
Fil: Costa, Carlos Horacio. Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Departamento de Geología; Argentina
Fil: Gardini, Carlos Enrique. Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Departamento de Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis; Argentina
description Scarps related to Quaternary-active thrust splays propagating in alluvial bajadas of the Southern Precordillera of Argentina (32°20′) were studied through detailed topographic surveys, in order to understand the reliability of these landforms as deformation markers at an outcrop scale. Geometric parameters of causative structures were used to constrain balanced cross-sections through trishear modelling for shortening estimation and also with the aim of comparing the predicted geometry of these models with the scarp profile. Shortening estimation through retro-deformation of scarps contours was also conducted as an alternative approach for calculating deformation affecting these alluvial surfaces. Results indicate that fold geometries predicted by trishear modelling do not fit with the present scarp shapes, suggesting modifications and slope angle decrease of the front limb. In order to match the modelled folds with the scarp profiles, it is necessary to place constraints to fault parameters, such as ramp angle and tip point position, not compatible with field observations. Trishear models predict shortening values 8 to 15 times larger than those obtained through line retrodeformation of scarp profiles. Therefore, scarp shapes at a mesoscopic scale in the study area, are not considered a reliable deformation marker for shortening estimation of propagating thrusts through an unconsolidated cover.
publishDate 2017
dc.date.none.fl_str_mv 2017-05
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/11336/60465
Vazquez, Fabricio Rodrigo; Costa, Carlos Horacio; Gardini, Carlos Enrique; Quaternary-active thrusts scarps tested as deformation markers by trishear models in the Southern Precordillera of Argentina; Pergamon-Elsevier Science Ltd; Quaternary International; 438; 5-2017; 65-79
1040-6182
CONICET Digital
CONICET
url http://hdl.handle.net/11336/60465
identifier_str_mv Vazquez, Fabricio Rodrigo; Costa, Carlos Horacio; Gardini, Carlos Enrique; Quaternary-active thrusts scarps tested as deformation markers by trishear models in the Southern Precordillera of Argentina; Pergamon-Elsevier Science Ltd; Quaternary International; 438; 5-2017; 65-79
1040-6182
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quaint.2016.06.020
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1040618216300404
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
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
_version_ 1842269096678260736
score 13.13397

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