Kinematically heterogeneous faulting in the configuration of Neogene Patagonian foreland basins: activation of pre-existing fabrics and strain partitioning

Autores
García, Micaela Romina; López, Manuel; Bucher, Joaquin; D'Elia, Leandro; Bilmes, Andrés; Franzese, Juan
Año de publicación
2019
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The retroarc of the North Patagonian Andes was configured by the uplift of basement blocks limited by faults strongly oblique to the Andean chain. These fault systems defined the Patagonian Broken Foreland, characterized by a series of Neogene basins distributed along the reatroarc system. Several interpretations about the origin of this tectonic scenario have been devised in recent years. On the one hand, a partitioning of deformation is proposed as the main control in the configuration of the main cordillera and the foreland zone as a result of oblique convergence between Nazca y South America plates. Contrarily, reactivation of Paleozoic and Mesozoic crustal anisotropies was suggested to explain the configuration of thick-skinned-dominated tectonics during the last contractional Andean orogeny phase. Nevertheless, detailed studies that tested the relationship between the Paleozoic and Mesozoic crustal weaknesses with Andean structures have not yet been developed. This uncertainty determines an ambiguous tectonic framework in which kinematic analysis is absent.The Sañicó Massif presents uplifted basement blocks with well-exposed fault zones associated with a thin record of intermontane basin infill. The work was carried out based on morphostructural and microstructural studies of pre-existing basement fabrics and the Andean structures. The basement fabrics (regional metamorphic foliation and ductile shear zones) present a close location and geometric relationship with all extensional Mesozoic and Andean faults. Kinematic results of small-scale faults show heterogeneous patterns due to the interaction of pre-existing fabrics reactivation, multiple deformations and subgroups of new faults.The results indicate a three-dimensional deformation model in the foreland zone, fundamentally controlled by the activation of Paleozoic basement fabrics and tectonic inversion of Mesozoic extensional faults. In turn, the small-scale structures present a heterogeneous distribution, which could be linked to the response of convergence direction. Although the results demonstrate a strong control of pre-existing weaknesses, mechanical models of deformation that reproduce the observed kinematic model, can provide insight into the natural conditions of deformation. Hence, analogue models will represent a functional tool for testing the influence of structural inheritance as well as, the progressive deformation undergone during different tectonic conditions.
Fil: García, Micaela Romina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: López, Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Bucher, Joaquin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: D'Elia, Leandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Bilmes, Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico de Geología y Paleontología; Argentina
Fil: Franzese, Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
25th Latin American Colloquium of Geosciences
Hamburg
Alemania
Universität Hamburg
Materia
Tectónica
Geología Estructural
Cuencas sedimentarias
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/204572
Acceder
id CONICETDig_d45fedc261ca3022adcf17f382020aa1
oai_identifier_str oai:ri.conicet.gov.ar:11336/204572
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Kinematically heterogeneous faulting in the configuration of Neogene Patagonian foreland basins: activation of pre-existing fabrics and strain partitioningGarcía, Micaela RominaLópez, ManuelBucher, JoaquinD'Elia, LeandroBilmes, AndrésFranzese, JuanTectónicaGeología EstructuralCuencas sedimentariashttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The retroarc of the North Patagonian Andes was configured by the uplift of basement blocks limited by faults strongly oblique to the Andean chain. These fault systems defined the Patagonian Broken Foreland, characterized by a series of Neogene basins distributed along the reatroarc system. Several interpretations about the origin of this tectonic scenario have been devised in recent years. On the one hand, a partitioning of deformation is proposed as the main control in the configuration of the main cordillera and the foreland zone as a result of oblique convergence between Nazca y South America plates. Contrarily, reactivation of Paleozoic and Mesozoic crustal anisotropies was suggested to explain the configuration of thick-skinned-dominated tectonics during the last contractional Andean orogeny phase. Nevertheless, detailed studies that tested the relationship between the Paleozoic and Mesozoic crustal weaknesses with Andean structures have not yet been developed. This uncertainty determines an ambiguous tectonic framework in which kinematic analysis is absent.The Sañicó Massif presents uplifted basement blocks with well-exposed fault zones associated with a thin record of intermontane basin infill. The work was carried out based on morphostructural and microstructural studies of pre-existing basement fabrics and the Andean structures. The basement fabrics (regional metamorphic foliation and ductile shear zones) present a close location and geometric relationship with all extensional Mesozoic and Andean faults. Kinematic results of small-scale faults show heterogeneous patterns due to the interaction of pre-existing fabrics reactivation, multiple deformations and subgroups of new faults.The results indicate a three-dimensional deformation model in the foreland zone, fundamentally controlled by the activation of Paleozoic basement fabrics and tectonic inversion of Mesozoic extensional faults. In turn, the small-scale structures present a heterogeneous distribution, which could be linked to the response of convergence direction. Although the results demonstrate a strong control of pre-existing weaknesses, mechanical models of deformation that reproduce the observed kinematic model, can provide insight into the natural conditions of deformation. Hence, analogue models will represent a functional tool for testing the influence of structural inheritance as well as, the progressive deformation undergone during different tectonic conditions.Fil: García, Micaela Romina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: López, Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: Bucher, Joaquin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: D'Elia, Leandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: Bilmes, Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico de Geología y Paleontología; ArgentinaFil: Franzese, Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina25th Latin American Colloquium of GeosciencesHamburgAlemaniaUniversität HamburgSchriften GeoUnion Alfred Wegener-StiftungRiller, UllrichGöllner, Paul2019info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectOtroJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/204572Kinematically heterogeneous faulting in the configuration of Neogene Patagonian foreland basins: activation of pre-existing fabrics and strain partitioning; 25th Latin American Colloquium of Geosciences; Hamburg; Alemania; 2019; 44-440946-8978CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.23689/fidgeo-3609info:eu-repo/semantics/altIdentifier/url/https://e-docs.geo-leo.de/handle/11858/7935Internacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-11-12T09:50:13Zoai:ri.conicet.gov.ar:11336/204572instacron: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:34982025-11-12 09:50:14.206CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Kinematically heterogeneous faulting in the configuration of Neogene Patagonian foreland basins: activation of pre-existing fabrics and strain partitioning
title Kinematically heterogeneous faulting in the configuration of Neogene Patagonian foreland basins: activation of pre-existing fabrics and strain partitioning
spellingShingle Kinematically heterogeneous faulting in the configuration of Neogene Patagonian foreland basins: activation of pre-existing fabrics and strain partitioning
García, Micaela Romina
Tectónica
Geología Estructural
Cuencas sedimentarias
title_short Kinematically heterogeneous faulting in the configuration of Neogene Patagonian foreland basins: activation of pre-existing fabrics and strain partitioning
title_full Kinematically heterogeneous faulting in the configuration of Neogene Patagonian foreland basins: activation of pre-existing fabrics and strain partitioning
title_fullStr Kinematically heterogeneous faulting in the configuration of Neogene Patagonian foreland basins: activation of pre-existing fabrics and strain partitioning
title_full_unstemmed Kinematically heterogeneous faulting in the configuration of Neogene Patagonian foreland basins: activation of pre-existing fabrics and strain partitioning
title_sort Kinematically heterogeneous faulting in the configuration of Neogene Patagonian foreland basins: activation of pre-existing fabrics and strain partitioning
dc.creator.none.fl_str_mv García, Micaela Romina
López, Manuel
Bucher, Joaquin
D'Elia, Leandro
Bilmes, Andrés
Franzese, Juan
author García, Micaela Romina
author_facet García, Micaela Romina
López, Manuel
Bucher, Joaquin
D'Elia, Leandro
Bilmes, Andrés
Franzese, Juan
author_role author
author2 López, Manuel
Bucher, Joaquin
D'Elia, Leandro
Bilmes, Andrés
Franzese, Juan
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Riller, Ullrich
Göllner, Paul
dc.subject.none.fl_str_mv Tectónica
Geología Estructural
Cuencas sedimentarias
topic Tectónica
Geología Estructural
Cuencas sedimentarias
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The retroarc of the North Patagonian Andes was configured by the uplift of basement blocks limited by faults strongly oblique to the Andean chain. These fault systems defined the Patagonian Broken Foreland, characterized by a series of Neogene basins distributed along the reatroarc system. Several interpretations about the origin of this tectonic scenario have been devised in recent years. On the one hand, a partitioning of deformation is proposed as the main control in the configuration of the main cordillera and the foreland zone as a result of oblique convergence between Nazca y South America plates. Contrarily, reactivation of Paleozoic and Mesozoic crustal anisotropies was suggested to explain the configuration of thick-skinned-dominated tectonics during the last contractional Andean orogeny phase. Nevertheless, detailed studies that tested the relationship between the Paleozoic and Mesozoic crustal weaknesses with Andean structures have not yet been developed. This uncertainty determines an ambiguous tectonic framework in which kinematic analysis is absent.The Sañicó Massif presents uplifted basement blocks with well-exposed fault zones associated with a thin record of intermontane basin infill. The work was carried out based on morphostructural and microstructural studies of pre-existing basement fabrics and the Andean structures. The basement fabrics (regional metamorphic foliation and ductile shear zones) present a close location and geometric relationship with all extensional Mesozoic and Andean faults. Kinematic results of small-scale faults show heterogeneous patterns due to the interaction of pre-existing fabrics reactivation, multiple deformations and subgroups of new faults.The results indicate a three-dimensional deformation model in the foreland zone, fundamentally controlled by the activation of Paleozoic basement fabrics and tectonic inversion of Mesozoic extensional faults. In turn, the small-scale structures present a heterogeneous distribution, which could be linked to the response of convergence direction. Although the results demonstrate a strong control of pre-existing weaknesses, mechanical models of deformation that reproduce the observed kinematic model, can provide insight into the natural conditions of deformation. Hence, analogue models will represent a functional tool for testing the influence of structural inheritance as well as, the progressive deformation undergone during different tectonic conditions.
Fil: García, Micaela Romina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: López, Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Bucher, Joaquin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: D'Elia, Leandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Bilmes, Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico de Geología y Paleontología; Argentina
Fil: Franzese, Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
25th Latin American Colloquium of Geosciences
Hamburg
Alemania
Universität Hamburg
description The retroarc of the North Patagonian Andes was configured by the uplift of basement blocks limited by faults strongly oblique to the Andean chain. These fault systems defined the Patagonian Broken Foreland, characterized by a series of Neogene basins distributed along the reatroarc system. Several interpretations about the origin of this tectonic scenario have been devised in recent years. On the one hand, a partitioning of deformation is proposed as the main control in the configuration of the main cordillera and the foreland zone as a result of oblique convergence between Nazca y South America plates. Contrarily, reactivation of Paleozoic and Mesozoic crustal anisotropies was suggested to explain the configuration of thick-skinned-dominated tectonics during the last contractional Andean orogeny phase. Nevertheless, detailed studies that tested the relationship between the Paleozoic and Mesozoic crustal weaknesses with Andean structures have not yet been developed. This uncertainty determines an ambiguous tectonic framework in which kinematic analysis is absent.The Sañicó Massif presents uplifted basement blocks with well-exposed fault zones associated with a thin record of intermontane basin infill. The work was carried out based on morphostructural and microstructural studies of pre-existing basement fabrics and the Andean structures. The basement fabrics (regional metamorphic foliation and ductile shear zones) present a close location and geometric relationship with all extensional Mesozoic and Andean faults. Kinematic results of small-scale faults show heterogeneous patterns due to the interaction of pre-existing fabrics reactivation, multiple deformations and subgroups of new faults.The results indicate a three-dimensional deformation model in the foreland zone, fundamentally controlled by the activation of Paleozoic basement fabrics and tectonic inversion of Mesozoic extensional faults. In turn, the small-scale structures present a heterogeneous distribution, which could be linked to the response of convergence direction. Although the results demonstrate a strong control of pre-existing weaknesses, mechanical models of deformation that reproduce the observed kinematic model, can provide insight into the natural conditions of deformation. Hence, analogue models will represent a functional tool for testing the influence of structural inheritance as well as, the progressive deformation undergone during different tectonic conditions.
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Otro
Journal
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/204572
Kinematically heterogeneous faulting in the configuration of Neogene Patagonian foreland basins: activation of pre-existing fabrics and strain partitioning; 25th Latin American Colloquium of Geosciences; Hamburg; Alemania; 2019; 44-44
0946-8978
CONICET Digital
CONICET
url http://hdl.handle.net/11336/204572
identifier_str_mv Kinematically heterogeneous faulting in the configuration of Neogene Patagonian foreland basins: activation of pre-existing fabrics and strain partitioning; 25th Latin American Colloquium of Geosciences; Hamburg; Alemania; 2019; 44-44
0946-8978
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.23689/fidgeo-3609
info:eu-repo/semantics/altIdentifier/url/https://e-docs.geo-leo.de/handle/11858/7935
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv Schriften GeoUnion Alfred Wegener-Stiftung
publisher.none.fl_str_mv Schriften GeoUnion Alfred Wegener-Stiftung
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_ 1848598104307138560
score 13.24909

Publicaciones similares