Contemporary stress field, crustal deformation, exhumation and sedimentation during the building of the Central Andes over the last 20 my: Advances in the Central Andean Stress Fie...

Autores
Giambiagi, Laura Beatriz; Spagnotto, Silvana Liz; Suriano, Julieta; Lossada, Ana Clara; Mescua, Jose Francisco; Quiroga Carrasco, Rodrigo Adolfo; Barrionuevo, Matías
Año de publicación
2019
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The estimation of contemporary stress field, crustal deformation and sedimentation during the evolution of the southern Central Andes, between 20º and 36ºS, is crucial for the understanding of plate-driving and gravitational forces, acting during the construction of a subduction-related orogenic system, and the mechanical behaviour of the continental plate. While the synergies between crustal deformation, exhumation and sedimentation processes are well-known to first order, it is challenging to evaluate the interplay between constructive deep mechanisms building the Andes, the stress field, exhumation and basin development.The goal of our study is to do a systematic analysis of the stress field evolution, in the time interval between 20 Ma to the Quaternary. For this purpose, the temporal and spatial stress field variations as a parameter crucial to understanding the relationship between deep and shallow crustal deformation and associated exhumation and sedimentation is used.Reduced stress tensors, n=293, from more than 4,000 fault-slip data were obtained. This data set is integrated with 9,240 published fault-slip data from other authors, into a database to obtain a total of 865 location sites with kinematic data or reduced stress tensors. Data from geophysical logs, dyke and sill analysis, and the compilation of 1,293 earthquake (>2 Mw) focal mechanisms to image the current stress field in the High Andes and the forelands.The integration of these data suggests that, on the one hand, spatiotemporal changes in the state of stress in the crust indicate a shift from compression to strike-slip or normal tectonics, associated with σ3/σ2 and σ2/σ1 permutations respectively, in the highest portions of the Andes, due to an increase in the absolute magnitude of the vertical stress component as the crust thickens and the gravitational potential energy increases. This change in local stress regime is closely linked with changes in the style of basin formation, for example from either foreland or broken foreland to pull-apart settings.On the other hand, the results of paleo and present stress field analysis show a remarkably consistent maximum horizontal stress direction (either σ1 or σ2) subperpendicular to the plate convergence direction and/or subperpendicular to spatial variations of the gravitational component of stress. This suggests that, during the latest stage of Andean construction of the last 20 my, the SHmax orientation is mainly controlled by plate boundary forces, topography and lithospheric density structure.
Fil: Giambiagi, Laura Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Spagnotto, Silvana Liz. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; Argentina
Fil: Suriano, Julieta. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Lossada, Ana Clara. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Mescua, Jose Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina
Fil: Quiroga Carrasco, Rodrigo Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Barrionuevo, Matías. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
8th International Symposium on Andean Geodynamics
Quito
Ecuador
Escuela Politécnica Nacional
Institut de Recherche pour le Développement
Materia
CENTRAL ANDES
Stress Field
Exhumation
Sedimentation
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:11336/234281

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spelling Contemporary stress field, crustal deformation, exhumation and sedimentation during the building of the Central Andes over the last 20 my: Advances in the Central Andean Stress Field Evolution ProjectGiambiagi, Laura BeatrizSpagnotto, Silvana LizSuriano, JulietaLossada, Ana ClaraMescua, Jose FranciscoQuiroga Carrasco, Rodrigo AdolfoBarrionuevo, MatíasCENTRAL ANDESStress FieldExhumationSedimentationhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The estimation of contemporary stress field, crustal deformation and sedimentation during the evolution of the southern Central Andes, between 20º and 36ºS, is crucial for the understanding of plate-driving and gravitational forces, acting during the construction of a subduction-related orogenic system, and the mechanical behaviour of the continental plate. While the synergies between crustal deformation, exhumation and sedimentation processes are well-known to first order, it is challenging to evaluate the interplay between constructive deep mechanisms building the Andes, the stress field, exhumation and basin development.The goal of our study is to do a systematic analysis of the stress field evolution, in the time interval between 20 Ma to the Quaternary. For this purpose, the temporal and spatial stress field variations as a parameter crucial to understanding the relationship between deep and shallow crustal deformation and associated exhumation and sedimentation is used.Reduced stress tensors, n=293, from more than 4,000 fault-slip data were obtained. This data set is integrated with 9,240 published fault-slip data from other authors, into a database to obtain a total of 865 location sites with kinematic data or reduced stress tensors. Data from geophysical logs, dyke and sill analysis, and the compilation of 1,293 earthquake (>2 Mw) focal mechanisms to image the current stress field in the High Andes and the forelands.The integration of these data suggests that, on the one hand, spatiotemporal changes in the state of stress in the crust indicate a shift from compression to strike-slip or normal tectonics, associated with σ3/σ2 and σ2/σ1 permutations respectively, in the highest portions of the Andes, due to an increase in the absolute magnitude of the vertical stress component as the crust thickens and the gravitational potential energy increases. This change in local stress regime is closely linked with changes in the style of basin formation, for example from either foreland or broken foreland to pull-apart settings.On the other hand, the results of paleo and present stress field analysis show a remarkably consistent maximum horizontal stress direction (either σ1 or σ2) subperpendicular to the plate convergence direction and/or subperpendicular to spatial variations of the gravitational component of stress. This suggests that, during the latest stage of Andean construction of the last 20 my, the SHmax orientation is mainly controlled by plate boundary forces, topography and lithospheric density structure.Fil: Giambiagi, Laura Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaFil: Spagnotto, Silvana Liz. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; ArgentinaFil: Suriano, Julieta. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaFil: Lossada, Ana Clara. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; ArgentinaFil: Mescua, Jose Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; ArgentinaFil: Quiroga Carrasco, Rodrigo Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaFil: Barrionuevo, Matías. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina8th International Symposium on Andean GeodynamicsQuitoEcuadorEscuela Politécnica NacionalInstitut de Recherche pour le DéveloppementInternational Society for Animal Genetics2019info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectSimposioBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/234281Contemporary stress field, crustal deformation, exhumation and sedimentation during the building of the Central Andes over the last 20 my: Advances in the Central Andean Stress Field Evolution Project; 8th International Symposium on Andean Geodynamics; Quito; Ecuador; 2019; 1-1CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.igepn.edu.ec/8isag-abstracts/plenary-talksinfo:eu-repo/semantics/altIdentifier/url/https://www.igepn.edu.ec/servicios/eventos/8isagInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:29:24Zoai:ri.conicet.gov.ar:11336/234281instacron: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:34982025-09-29 10:29:24.925CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Contemporary stress field, crustal deformation, exhumation and sedimentation during the building of the Central Andes over the last 20 my: Advances in the Central Andean Stress Field Evolution Project
title Contemporary stress field, crustal deformation, exhumation and sedimentation during the building of the Central Andes over the last 20 my: Advances in the Central Andean Stress Field Evolution Project
spellingShingle Contemporary stress field, crustal deformation, exhumation and sedimentation during the building of the Central Andes over the last 20 my: Advances in the Central Andean Stress Field Evolution Project
Giambiagi, Laura Beatriz
CENTRAL ANDES
Stress Field
Exhumation
Sedimentation
title_short Contemporary stress field, crustal deformation, exhumation and sedimentation during the building of the Central Andes over the last 20 my: Advances in the Central Andean Stress Field Evolution Project
title_full Contemporary stress field, crustal deformation, exhumation and sedimentation during the building of the Central Andes over the last 20 my: Advances in the Central Andean Stress Field Evolution Project
title_fullStr Contemporary stress field, crustal deformation, exhumation and sedimentation during the building of the Central Andes over the last 20 my: Advances in the Central Andean Stress Field Evolution Project
title_full_unstemmed Contemporary stress field, crustal deformation, exhumation and sedimentation during the building of the Central Andes over the last 20 my: Advances in the Central Andean Stress Field Evolution Project
title_sort Contemporary stress field, crustal deformation, exhumation and sedimentation during the building of the Central Andes over the last 20 my: Advances in the Central Andean Stress Field Evolution Project
dc.creator.none.fl_str_mv Giambiagi, Laura Beatriz
Spagnotto, Silvana Liz
Suriano, Julieta
Lossada, Ana Clara
Mescua, Jose Francisco
Quiroga Carrasco, Rodrigo Adolfo
Barrionuevo, Matías
author Giambiagi, Laura Beatriz
author_facet Giambiagi, Laura Beatriz
Spagnotto, Silvana Liz
Suriano, Julieta
Lossada, Ana Clara
Mescua, Jose Francisco
Quiroga Carrasco, Rodrigo Adolfo
Barrionuevo, Matías
author_role author
author2 Spagnotto, Silvana Liz
Suriano, Julieta
Lossada, Ana Clara
Mescua, Jose Francisco
Quiroga Carrasco, Rodrigo Adolfo
Barrionuevo, Matías
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv CENTRAL ANDES
Stress Field
Exhumation
Sedimentation
topic CENTRAL ANDES
Stress Field
Exhumation
Sedimentation
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 estimation of contemporary stress field, crustal deformation and sedimentation during the evolution of the southern Central Andes, between 20º and 36ºS, is crucial for the understanding of plate-driving and gravitational forces, acting during the construction of a subduction-related orogenic system, and the mechanical behaviour of the continental plate. While the synergies between crustal deformation, exhumation and sedimentation processes are well-known to first order, it is challenging to evaluate the interplay between constructive deep mechanisms building the Andes, the stress field, exhumation and basin development.The goal of our study is to do a systematic analysis of the stress field evolution, in the time interval between 20 Ma to the Quaternary. For this purpose, the temporal and spatial stress field variations as a parameter crucial to understanding the relationship between deep and shallow crustal deformation and associated exhumation and sedimentation is used.Reduced stress tensors, n=293, from more than 4,000 fault-slip data were obtained. This data set is integrated with 9,240 published fault-slip data from other authors, into a database to obtain a total of 865 location sites with kinematic data or reduced stress tensors. Data from geophysical logs, dyke and sill analysis, and the compilation of 1,293 earthquake (>2 Mw) focal mechanisms to image the current stress field in the High Andes and the forelands.The integration of these data suggests that, on the one hand, spatiotemporal changes in the state of stress in the crust indicate a shift from compression to strike-slip or normal tectonics, associated with σ3/σ2 and σ2/σ1 permutations respectively, in the highest portions of the Andes, due to an increase in the absolute magnitude of the vertical stress component as the crust thickens and the gravitational potential energy increases. This change in local stress regime is closely linked with changes in the style of basin formation, for example from either foreland or broken foreland to pull-apart settings.On the other hand, the results of paleo and present stress field analysis show a remarkably consistent maximum horizontal stress direction (either σ1 or σ2) subperpendicular to the plate convergence direction and/or subperpendicular to spatial variations of the gravitational component of stress. This suggests that, during the latest stage of Andean construction of the last 20 my, the SHmax orientation is mainly controlled by plate boundary forces, topography and lithospheric density structure.
Fil: Giambiagi, Laura Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Spagnotto, Silvana Liz. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; Argentina
Fil: Suriano, Julieta. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Lossada, Ana Clara. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Mescua, Jose Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina
Fil: Quiroga Carrasco, Rodrigo Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Barrionuevo, Matías. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
8th International Symposium on Andean Geodynamics
Quito
Ecuador
Escuela Politécnica Nacional
Institut de Recherche pour le Développement
description The estimation of contemporary stress field, crustal deformation and sedimentation during the evolution of the southern Central Andes, between 20º and 36ºS, is crucial for the understanding of plate-driving and gravitational forces, acting during the construction of a subduction-related orogenic system, and the mechanical behaviour of the continental plate. While the synergies between crustal deformation, exhumation and sedimentation processes are well-known to first order, it is challenging to evaluate the interplay between constructive deep mechanisms building the Andes, the stress field, exhumation and basin development.The goal of our study is to do a systematic analysis of the stress field evolution, in the time interval between 20 Ma to the Quaternary. For this purpose, the temporal and spatial stress field variations as a parameter crucial to understanding the relationship between deep and shallow crustal deformation and associated exhumation and sedimentation is used.Reduced stress tensors, n=293, from more than 4,000 fault-slip data were obtained. This data set is integrated with 9,240 published fault-slip data from other authors, into a database to obtain a total of 865 location sites with kinematic data or reduced stress tensors. Data from geophysical logs, dyke and sill analysis, and the compilation of 1,293 earthquake (>2 Mw) focal mechanisms to image the current stress field in the High Andes and the forelands.The integration of these data suggests that, on the one hand, spatiotemporal changes in the state of stress in the crust indicate a shift from compression to strike-slip or normal tectonics, associated with σ3/σ2 and σ2/σ1 permutations respectively, in the highest portions of the Andes, due to an increase in the absolute magnitude of the vertical stress component as the crust thickens and the gravitational potential energy increases. This change in local stress regime is closely linked with changes in the style of basin formation, for example from either foreland or broken foreland to pull-apart settings.On the other hand, the results of paleo and present stress field analysis show a remarkably consistent maximum horizontal stress direction (either σ1 or σ2) subperpendicular to the plate convergence direction and/or subperpendicular to spatial variations of the gravitational component of stress. This suggests that, during the latest stage of Andean construction of the last 20 my, the SHmax orientation is mainly controlled by plate boundary forces, topography and lithospheric density structure.
publishDate 2019
dc.date.none.fl_str_mv 2019
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info:eu-repo/semantics/conferenceObject
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Book
http://purl.org/coar/resource_type/c_5794
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status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/234281
Contemporary stress field, crustal deformation, exhumation and sedimentation during the building of the Central Andes over the last 20 my: Advances in the Central Andean Stress Field Evolution Project; 8th International Symposium on Andean Geodynamics; Quito; Ecuador; 2019; 1-1
CONICET Digital
CONICET
url http://hdl.handle.net/11336/234281
identifier_str_mv Contemporary stress field, crustal deformation, exhumation and sedimentation during the building of the Central Andes over the last 20 my: Advances in the Central Andean Stress Field Evolution Project; 8th International Symposium on Andean Geodynamics; Quito; Ecuador; 2019; 1-1
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
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publisher.none.fl_str_mv International Society for Animal Genetics
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