Tectonic and dynamic controls on the topography and subsidence of the Argentine Pampas: The role of the flat slab

Autores
Davila, Federico Miguel; Lithgow Bertelloni, Carolina; Gimenez, Mario Ernesto
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We analyze the Pampean foreland (the Pampas) along the modern flat-slab segment of the south-central Andes between 31° and 33° South latitude and to the east of the Argentine "flat-slab" province, using flexural and gravity studies and computations of dynamic topography. Bouguer anomalies and flexural analysis predict a foredeep of ~250. km width and a peripheral bulge amplitude of ~25. m, which match the regional morphologies of the modern Argentine Pampean Plain. However, these studies do not account for the subsurface Miocene-Quaternary basin preservation, represented by sedimentary thicknesses > 400 m and with depocenters > 400 km eastward with respect to flexural models. The discrepancy suggests that two mechanisms, acting at different wavelengths, influence the Argentine Pampas. The basin preservation is likely the result of a large-scale geodynamic forcing. Models of mantle flow, driven by realistic flat-slab subduction geometry and density contrasts, reproduce the depocenter location and the wavelength of subsidence as well as most of the remaining amplitude. Nonetheless, more sophisticated studies (e.g. considering lateral viscosity variations in the mantle wedge) might help reduce the dynamic amplitudes and better reproduce the observed geological record.
Fil: Davila, Federico Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Lithgow Bertelloni, Carolina. University College London; Estados Unidos
Fil: Gimenez, Mario Ernesto. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Andean Foreland
Argentina
Basin Analysis
Dynamic Topography
Flat Subduction
Pampas Plain
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:11336/55039
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Tectonic and dynamic controls on the topography and subsidence of the Argentine Pampas: The role of the flat slabDavila, Federico MiguelLithgow Bertelloni, CarolinaGimenez, Mario ErnestoAndean ForelandArgentinaBasin AnalysisDynamic TopographyFlat SubductionPampas Plainhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1We analyze the Pampean foreland (the Pampas) along the modern flat-slab segment of the south-central Andes between 31° and 33° South latitude and to the east of the Argentine "flat-slab" province, using flexural and gravity studies and computations of dynamic topography. Bouguer anomalies and flexural analysis predict a foredeep of ~250. km width and a peripheral bulge amplitude of ~25. m, which match the regional morphologies of the modern Argentine Pampean Plain. However, these studies do not account for the subsurface Miocene-Quaternary basin preservation, represented by sedimentary thicknesses > 400 m and with depocenters > 400 km eastward with respect to flexural models. The discrepancy suggests that two mechanisms, acting at different wavelengths, influence the Argentine Pampas. The basin preservation is likely the result of a large-scale geodynamic forcing. Models of mantle flow, driven by realistic flat-slab subduction geometry and density contrasts, reproduce the depocenter location and the wavelength of subsidence as well as most of the remaining amplitude. Nonetheless, more sophisticated studies (e.g. considering lateral viscosity variations in the mantle wedge) might help reduce the dynamic amplitudes and better reproduce the observed geological record.Fil: Davila, Federico Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; ArgentinaFil: Lithgow Bertelloni, Carolina. University College London; Estados UnidosFil: Gimenez, Mario Ernesto. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaElsevier Science2010-06-28info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/55039Davila, Federico Miguel; Lithgow Bertelloni, Carolina; Gimenez, Mario Ernesto; Tectonic and dynamic controls on the topography and subsidence of the Argentine Pampas: The role of the flat slab; Elsevier Science; Earth and Planetary Science Letters; 295; 1-2; 28-6-2010; 187-1940012-821XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0012821X10002232info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2010.03.039info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:12:37Zoai:ri.conicet.gov.ar:11336/55039instacron: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:34982025-10-22 11:12:37.659CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Tectonic and dynamic controls on the topography and subsidence of the Argentine Pampas: The role of the flat slab
title Tectonic and dynamic controls on the topography and subsidence of the Argentine Pampas: The role of the flat slab
spellingShingle Tectonic and dynamic controls on the topography and subsidence of the Argentine Pampas: The role of the flat slab
Davila, Federico Miguel
Andean Foreland
Argentina
Basin Analysis
Dynamic Topography
Flat Subduction
Pampas Plain
title_short Tectonic and dynamic controls on the topography and subsidence of the Argentine Pampas: The role of the flat slab
title_full Tectonic and dynamic controls on the topography and subsidence of the Argentine Pampas: The role of the flat slab
title_fullStr Tectonic and dynamic controls on the topography and subsidence of the Argentine Pampas: The role of the flat slab
title_full_unstemmed Tectonic and dynamic controls on the topography and subsidence of the Argentine Pampas: The role of the flat slab
title_sort Tectonic and dynamic controls on the topography and subsidence of the Argentine Pampas: The role of the flat slab
dc.creator.none.fl_str_mv Davila, Federico Miguel
Lithgow Bertelloni, Carolina
Gimenez, Mario Ernesto
author Davila, Federico Miguel
author_facet Davila, Federico Miguel
Lithgow Bertelloni, Carolina
Gimenez, Mario Ernesto
author_role author
author2 Lithgow Bertelloni, Carolina
Gimenez, Mario Ernesto
author2_role author
author
dc.subject.none.fl_str_mv Andean Foreland
Argentina
Basin Analysis
Dynamic Topography
Flat Subduction
Pampas Plain
topic Andean Foreland
Argentina
Basin Analysis
Dynamic Topography
Flat Subduction
Pampas Plain
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We analyze the Pampean foreland (the Pampas) along the modern flat-slab segment of the south-central Andes between 31° and 33° South latitude and to the east of the Argentine "flat-slab" province, using flexural and gravity studies and computations of dynamic topography. Bouguer anomalies and flexural analysis predict a foredeep of ~250. km width and a peripheral bulge amplitude of ~25. m, which match the regional morphologies of the modern Argentine Pampean Plain. However, these studies do not account for the subsurface Miocene-Quaternary basin preservation, represented by sedimentary thicknesses > 400 m and with depocenters > 400 km eastward with respect to flexural models. The discrepancy suggests that two mechanisms, acting at different wavelengths, influence the Argentine Pampas. The basin preservation is likely the result of a large-scale geodynamic forcing. Models of mantle flow, driven by realistic flat-slab subduction geometry and density contrasts, reproduce the depocenter location and the wavelength of subsidence as well as most of the remaining amplitude. Nonetheless, more sophisticated studies (e.g. considering lateral viscosity variations in the mantle wedge) might help reduce the dynamic amplitudes and better reproduce the observed geological record.
Fil: Davila, Federico Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Lithgow Bertelloni, Carolina. University College London; Estados Unidos
Fil: Gimenez, Mario Ernesto. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description We analyze the Pampean foreland (the Pampas) along the modern flat-slab segment of the south-central Andes between 31° and 33° South latitude and to the east of the Argentine "flat-slab" province, using flexural and gravity studies and computations of dynamic topography. Bouguer anomalies and flexural analysis predict a foredeep of ~250. km width and a peripheral bulge amplitude of ~25. m, which match the regional morphologies of the modern Argentine Pampean Plain. However, these studies do not account for the subsurface Miocene-Quaternary basin preservation, represented by sedimentary thicknesses > 400 m and with depocenters > 400 km eastward with respect to flexural models. The discrepancy suggests that two mechanisms, acting at different wavelengths, influence the Argentine Pampas. The basin preservation is likely the result of a large-scale geodynamic forcing. Models of mantle flow, driven by realistic flat-slab subduction geometry and density contrasts, reproduce the depocenter location and the wavelength of subsidence as well as most of the remaining amplitude. Nonetheless, more sophisticated studies (e.g. considering lateral viscosity variations in the mantle wedge) might help reduce the dynamic amplitudes and better reproduce the observed geological record.
publishDate 2010
dc.date.none.fl_str_mv 2010-06-28
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/11336/55039
Davila, Federico Miguel; Lithgow Bertelloni, Carolina; Gimenez, Mario Ernesto; Tectonic and dynamic controls on the topography and subsidence of the Argentine Pampas: The role of the flat slab; Elsevier Science; Earth and Planetary Science Letters; 295; 1-2; 28-6-2010; 187-194
0012-821X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/55039
identifier_str_mv Davila, Federico Miguel; Lithgow Bertelloni, Carolina; Gimenez, Mario Ernesto; Tectonic and dynamic controls on the topography and subsidence of the Argentine Pampas: The role of the flat slab; Elsevier Science; Earth and Planetary Science Letters; 295; 1-2; 28-6-2010; 187-194
0012-821X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0012821X10002232
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2010.03.039
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
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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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score 12.982451

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