Dynamics of deformation and sedimentation in the northern Sierras pampeanas: An integrated study of the neogene Fiambalá basin, NW argentina: Comment and discussion

Autores
Davila, Federico Miguel
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In a recent contribution to the Geological Society of America Bulletin, Carrapa et al. (2008) provided an interesting geochronological and thermoChronological database for the Fiambalá Basin, northern end of the Sierras Pampeanas, which, together with stratigraphic, sedimentological and structural data, led them to interpret a late Miocene–Pliocene foreland reorganization from a simple scenario (e.g., DeCelles and Giles, 1996) to settings dominated by intermontane basement thrusting. They associated this reorganization with the beginning of fl at subduction, which would have been coeval (according to Carrapa et al., 2008) with broken foreland stages in the Bermejo Basin (>400 km south). One of the most crucial issues that Carrapa et al. (2008, p. 1518–1543) address (in their words) is “the structural and sedimentary behavior of broken forelands and their relationships with large-scale plate-tectonic processes such as fl at-slab subduction” that can “contribute to a better understanding of the transition from unbroken foreland (thin-skinned) to broken foreland (thick-skinned) styles of deformation and related sedimentation.” However, for some reason, they did not discuss the entire Andean stratigraphy of the area, superbly exposed much less than 50 km southward and 100 km northward of their study region (in central Famatina and Southern Puna, respectively; see Fig. 1). These two regions are evidently much closer than the Bermejo Basin exposures (see Jordan et al., 2001), which were used as a key correlation. The Bermejo Basin is located at ~31°S, i.e., ~400 km southward of Fiambalá (Fig. 1). Although I do agree that the entire extent of the Sierras Pampeanas shows evidences of basement- thrusting tectonics during the late Miocene to Pliocene and even during the Quater nary (already demonstrated previously; e.g., Jordan and Allmendinger, 1986; Ramos et al., 2002; among others), there are sources that indicate the foreland partitioning would have begun earlier. Particularly, I disagree with: (1) the timing of transformation from “simple fl exural stages” to “broken foreland scenarios” and (2) their interpretation about a synchronous slab shallowing at ca. 6 Ma. This discussion is divided into four lines of reasoning: mapping and stratigraphy of Tertiary sequences in Famatina and Southern Puna; timing of basement thrusting in boundary regions; thermochronology; and evidences of flat subduction between 29°S and 26°S.
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
Materia
Antepais Fragmentado
Cuencas
Deformacion de Zocalo
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
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CONICET Digital (CONICET)
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Consejo Nacional de Investigaciones Científicas y Técnicas
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oai:ri.conicet.gov.ar:11336/54427

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spelling Dynamics of deformation and sedimentation in the northern Sierras pampeanas: An integrated study of the neogene Fiambalá basin, NW argentina: Comment and discussionDavila, Federico MiguelAntepais FragmentadoCuencasDeformacion de Zocalohttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1In a recent contribution to the Geological Society of America Bulletin, Carrapa et al. (2008) provided an interesting geochronological and thermoChronological database for the Fiambalá Basin, northern end of the Sierras Pampeanas, which, together with stratigraphic, sedimentological and structural data, led them to interpret a late Miocene–Pliocene foreland reorganization from a simple scenario (e.g., DeCelles and Giles, 1996) to settings dominated by intermontane basement thrusting. They associated this reorganization with the beginning of fl at subduction, which would have been coeval (according to Carrapa et al., 2008) with broken foreland stages in the Bermejo Basin (>400 km south). One of the most crucial issues that Carrapa et al. (2008, p. 1518–1543) address (in their words) is “the structural and sedimentary behavior of broken forelands and their relationships with large-scale plate-tectonic processes such as fl at-slab subduction” that can “contribute to a better understanding of the transition from unbroken foreland (thin-skinned) to broken foreland (thick-skinned) styles of deformation and related sedimentation.” However, for some reason, they did not discuss the entire Andean stratigraphy of the area, superbly exposed much less than 50 km southward and 100 km northward of their study region (in central Famatina and Southern Puna, respectively; see Fig. 1). These two regions are evidently much closer than the Bermejo Basin exposures (see Jordan et al., 2001), which were used as a key correlation. The Bermejo Basin is located at ~31°S, i.e., ~400 km southward of Fiambalá (Fig. 1). Although I do agree that the entire extent of the Sierras Pampeanas shows evidences of basement- thrusting tectonics during the late Miocene to Pliocene and even during the Quater nary (already demonstrated previously; e.g., Jordan and Allmendinger, 1986; Ramos et al., 2002; among others), there are sources that indicate the foreland partitioning would have begun earlier. Particularly, I disagree with: (1) the timing of transformation from “simple fl exural stages” to “broken foreland scenarios” and (2) their interpretation about a synchronous slab shallowing at ca. 6 Ma. This discussion is divided into four lines of reasoning: mapping and stratigraphy of Tertiary sequences in Famatina and Southern Puna; timing of basement thrusting in boundary regions; thermochronology; and evidences of flat subduction between 29°S and 26°S.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; ArgentinaGeological Society of America2010-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/54427Davila, Federico Miguel; Dynamics of deformation and sedimentation in the northern Sierras pampeanas: An integrated study of the neogene Fiambalá basin, NW argentina: Comment and discussion; Geological Society of America; Geological Society Of America Bulletin; 122; 5-6; 5-2010; 946-9490016-76061943-2674CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://bit.ly/2OlRbhHinfo:eu-repo/semantics/altIdentifier/doi/10.1130/B30133.1info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:04:33Zoai:ri.conicet.gov.ar:11336/54427instacron: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 10:04:33.517CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Dynamics of deformation and sedimentation in the northern Sierras pampeanas: An integrated study of the neogene Fiambalá basin, NW argentina: Comment and discussion
title Dynamics of deformation and sedimentation in the northern Sierras pampeanas: An integrated study of the neogene Fiambalá basin, NW argentina: Comment and discussion
spellingShingle Dynamics of deformation and sedimentation in the northern Sierras pampeanas: An integrated study of the neogene Fiambalá basin, NW argentina: Comment and discussion
Davila, Federico Miguel
Antepais Fragmentado
Cuencas
Deformacion de Zocalo
title_short Dynamics of deformation and sedimentation in the northern Sierras pampeanas: An integrated study of the neogene Fiambalá basin, NW argentina: Comment and discussion
title_full Dynamics of deformation and sedimentation in the northern Sierras pampeanas: An integrated study of the neogene Fiambalá basin, NW argentina: Comment and discussion
title_fullStr Dynamics of deformation and sedimentation in the northern Sierras pampeanas: An integrated study of the neogene Fiambalá basin, NW argentina: Comment and discussion
title_full_unstemmed Dynamics of deformation and sedimentation in the northern Sierras pampeanas: An integrated study of the neogene Fiambalá basin, NW argentina: Comment and discussion
title_sort Dynamics of deformation and sedimentation in the northern Sierras pampeanas: An integrated study of the neogene Fiambalá basin, NW argentina: Comment and discussion
dc.creator.none.fl_str_mv Davila, Federico Miguel
author Davila, Federico Miguel
author_facet Davila, Federico Miguel
author_role author
dc.subject.none.fl_str_mv Antepais Fragmentado
Cuencas
Deformacion de Zocalo
topic Antepais Fragmentado
Cuencas
Deformacion de Zocalo
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv In a recent contribution to the Geological Society of America Bulletin, Carrapa et al. (2008) provided an interesting geochronological and thermoChronological database for the Fiambalá Basin, northern end of the Sierras Pampeanas, which, together with stratigraphic, sedimentological and structural data, led them to interpret a late Miocene–Pliocene foreland reorganization from a simple scenario (e.g., DeCelles and Giles, 1996) to settings dominated by intermontane basement thrusting. They associated this reorganization with the beginning of fl at subduction, which would have been coeval (according to Carrapa et al., 2008) with broken foreland stages in the Bermejo Basin (>400 km south). One of the most crucial issues that Carrapa et al. (2008, p. 1518–1543) address (in their words) is “the structural and sedimentary behavior of broken forelands and their relationships with large-scale plate-tectonic processes such as fl at-slab subduction” that can “contribute to a better understanding of the transition from unbroken foreland (thin-skinned) to broken foreland (thick-skinned) styles of deformation and related sedimentation.” However, for some reason, they did not discuss the entire Andean stratigraphy of the area, superbly exposed much less than 50 km southward and 100 km northward of their study region (in central Famatina and Southern Puna, respectively; see Fig. 1). These two regions are evidently much closer than the Bermejo Basin exposures (see Jordan et al., 2001), which were used as a key correlation. The Bermejo Basin is located at ~31°S, i.e., ~400 km southward of Fiambalá (Fig. 1). Although I do agree that the entire extent of the Sierras Pampeanas shows evidences of basement- thrusting tectonics during the late Miocene to Pliocene and even during the Quater nary (already demonstrated previously; e.g., Jordan and Allmendinger, 1986; Ramos et al., 2002; among others), there are sources that indicate the foreland partitioning would have begun earlier. Particularly, I disagree with: (1) the timing of transformation from “simple fl exural stages” to “broken foreland scenarios” and (2) their interpretation about a synchronous slab shallowing at ca. 6 Ma. This discussion is divided into four lines of reasoning: mapping and stratigraphy of Tertiary sequences in Famatina and Southern Puna; timing of basement thrusting in boundary regions; thermochronology; and evidences of flat subduction between 29°S and 26°S.
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
description In a recent contribution to the Geological Society of America Bulletin, Carrapa et al. (2008) provided an interesting geochronological and thermoChronological database for the Fiambalá Basin, northern end of the Sierras Pampeanas, which, together with stratigraphic, sedimentological and structural data, led them to interpret a late Miocene–Pliocene foreland reorganization from a simple scenario (e.g., DeCelles and Giles, 1996) to settings dominated by intermontane basement thrusting. They associated this reorganization with the beginning of fl at subduction, which would have been coeval (according to Carrapa et al., 2008) with broken foreland stages in the Bermejo Basin (>400 km south). One of the most crucial issues that Carrapa et al. (2008, p. 1518–1543) address (in their words) is “the structural and sedimentary behavior of broken forelands and their relationships with large-scale plate-tectonic processes such as fl at-slab subduction” that can “contribute to a better understanding of the transition from unbroken foreland (thin-skinned) to broken foreland (thick-skinned) styles of deformation and related sedimentation.” However, for some reason, they did not discuss the entire Andean stratigraphy of the area, superbly exposed much less than 50 km southward and 100 km northward of their study region (in central Famatina and Southern Puna, respectively; see Fig. 1). These two regions are evidently much closer than the Bermejo Basin exposures (see Jordan et al., 2001), which were used as a key correlation. The Bermejo Basin is located at ~31°S, i.e., ~400 km southward of Fiambalá (Fig. 1). Although I do agree that the entire extent of the Sierras Pampeanas shows evidences of basement- thrusting tectonics during the late Miocene to Pliocene and even during the Quater nary (already demonstrated previously; e.g., Jordan and Allmendinger, 1986; Ramos et al., 2002; among others), there are sources that indicate the foreland partitioning would have begun earlier. Particularly, I disagree with: (1) the timing of transformation from “simple fl exural stages” to “broken foreland scenarios” and (2) their interpretation about a synchronous slab shallowing at ca. 6 Ma. This discussion is divided into four lines of reasoning: mapping and stratigraphy of Tertiary sequences in Famatina and Southern Puna; timing of basement thrusting in boundary regions; thermochronology; and evidences of flat subduction between 29°S and 26°S.
publishDate 2010
dc.date.none.fl_str_mv 2010-05
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/11336/54427
Davila, Federico Miguel; Dynamics of deformation and sedimentation in the northern Sierras pampeanas: An integrated study of the neogene Fiambalá basin, NW argentina: Comment and discussion; Geological Society of America; Geological Society Of America Bulletin; 122; 5-6; 5-2010; 946-949
0016-7606
1943-2674
CONICET Digital
CONICET
url http://hdl.handle.net/11336/54427
identifier_str_mv Davila, Federico Miguel; Dynamics of deformation and sedimentation in the northern Sierras pampeanas: An integrated study of the neogene Fiambalá basin, NW argentina: Comment and discussion; Geological Society of America; Geological Society Of America Bulletin; 122; 5-6; 5-2010; 946-949
0016-7606
1943-2674
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://bit.ly/2OlRbhH
info:eu-repo/semantics/altIdentifier/doi/10.1130/B30133.1
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dc.format.none.fl_str_mv application/pdf
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dc.publisher.none.fl_str_mv Geological Society of America
publisher.none.fl_str_mv Geological Society of America
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instname:Consejo Nacional de Investigaciones Científicas y Técnicas
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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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