Active deformation in the northern Sierra de Valle Fertil, Sierras Pampeanas, Argentina

Autores
Ortiz, Gustavo Federico; Alvarado, Patricia Monica; Fosdick, Julie C.; Perucca, Laura Patricia A.; Saez, Mauro; Venerdini, Agostina Lia
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Western Sierras Pampeanas region in the San Juan Province is characterized by thick-skinned deformation with approximately NeS trending ranges of average heights of 2500 m and a high frequency occurrence of seismic activity. Its location to the east of the mainly thin-skinned tectonics of the Argentine Precordillera fold-and-thrust belt suggests that at 30S, deformation is concentrated in a narrow zone involving these two morphostructural units. In this paper, we present new apatite (UeTh)/He results (AHe) across the northern part of the Sierra de Valle Fertil (around 30S) and analyze them in aframework of thermochronologic available datasets. We found Pliocene AHe results for Carboniferous and Triassic strata in the northern Sierra de Valle Fertil consistent with the hypothesis of recent cooling and inferred erosional denudation concentrated along the northern end of this mountain range. Ouranalysis shows that this northern region may have evolved under different conditions than the central part of the Sierra de Valle Fertil. Previous studies have observed AHe ages consistent with Permian through Cretaceous cooling, indicating the middle part of the Sierra de Valle Fertil remained near surfacebefore the Pampean slab subduction flattening process. Those studies also obtained ~5 My cooling ages in the southern part of the Sierra de Valle Fertil, which are similar to our results in the northern end of the range. Taken together, these results suggest a pattern of young deformation in the northern and southern low elevation ends of the Sierra de Valle Fertil consistent with regions of high seismic activity, and Quaternary active faulting along the western-bounding thrust fault of the Sierra de Valle Fertil.
Fil: Ortiz, Gustavo Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Juan. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
Fil: Alvarado, Patricia Monica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Juan. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
Fil: Fosdick, Julie C.. Indiana University; Estados Unidos
Fil: Perucca, Laura Patricia A.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Juan. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
Fil: Saez, Mauro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Juan. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
Fil: Venerdini, Agostina Lia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Juan. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
Materia
Sierra Valle Fertil
Basement-Core Upflit
Thermochronology
Flat-Slab Subduction
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:11336/6643
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/6643
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Active deformation in the northern Sierra de Valle Fertil, Sierras Pampeanas, ArgentinaOrtiz, Gustavo FedericoAlvarado, Patricia MonicaFosdick, Julie C.Perucca, Laura Patricia A.Saez, MauroVenerdini, Agostina LiaSierra Valle FertilBasement-Core UpflitThermochronologyFlat-Slab Subductionhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Western Sierras Pampeanas region in the San Juan Province is characterized by thick-skinned deformation with approximately NeS trending ranges of average heights of 2500 m and a high frequency occurrence of seismic activity. Its location to the east of the mainly thin-skinned tectonics of the Argentine Precordillera fold-and-thrust belt suggests that at 30S, deformation is concentrated in a narrow zone involving these two morphostructural units. In this paper, we present new apatite (UeTh)/He results (AHe) across the northern part of the Sierra de Valle Fertil (around 30S) and analyze them in aframework of thermochronologic available datasets. We found Pliocene AHe results for Carboniferous and Triassic strata in the northern Sierra de Valle Fertil consistent with the hypothesis of recent cooling and inferred erosional denudation concentrated along the northern end of this mountain range. Ouranalysis shows that this northern region may have evolved under different conditions than the central part of the Sierra de Valle Fertil. Previous studies have observed AHe ages consistent with Permian through Cretaceous cooling, indicating the middle part of the Sierra de Valle Fertil remained near surfacebefore the Pampean slab subduction flattening process. Those studies also obtained ~5 My cooling ages in the southern part of the Sierra de Valle Fertil, which are similar to our results in the northern end of the range. Taken together, these results suggest a pattern of young deformation in the northern and southern low elevation ends of the Sierra de Valle Fertil consistent with regions of high seismic activity, and Quaternary active faulting along the western-bounding thrust fault of the Sierra de Valle Fertil.Fil: Ortiz, Gustavo Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Juan. Centro de Investigaciones de la Geosfera y Biosfera; ArgentinaFil: Alvarado, Patricia Monica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Juan. Centro de Investigaciones de la Geosfera y Biosfera; ArgentinaFil: Fosdick, Julie C.. Indiana University; Estados UnidosFil: Perucca, Laura Patricia A.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Juan. Centro de Investigaciones de la Geosfera y Biosfera; ArgentinaFil: Saez, Mauro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Juan. Centro de Investigaciones de la Geosfera y Biosfera; ArgentinaFil: Venerdini, Agostina Lia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Juan. Centro de Investigaciones de la Geosfera y Biosfera; ArgentinaElsevier2015-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/6643Ortiz, Gustavo Federico; Alvarado, Patricia Monica; Fosdick, Julie C.; Perucca, Laura Patricia A.; Saez, Mauro; et al.; Active deformation in the northern Sierra de Valle Fertil, Sierras Pampeanas, Argentina; Elsevier; Journal of South American Earth Sciences; 64; 2; 9-2015; 339-3500895-9811enginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0895981115300523info:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2015.08.015info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:26:45Zoai:ri.conicet.gov.ar:11336/6643instacron: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 11:26:45.98CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Active deformation in the northern Sierra de Valle Fertil, Sierras Pampeanas, Argentina
title Active deformation in the northern Sierra de Valle Fertil, Sierras Pampeanas, Argentina
spellingShingle Active deformation in the northern Sierra de Valle Fertil, Sierras Pampeanas, Argentina
Ortiz, Gustavo Federico
Sierra Valle Fertil
Basement-Core Upflit
Thermochronology
Flat-Slab Subduction
title_short Active deformation in the northern Sierra de Valle Fertil, Sierras Pampeanas, Argentina
title_full Active deformation in the northern Sierra de Valle Fertil, Sierras Pampeanas, Argentina
title_fullStr Active deformation in the northern Sierra de Valle Fertil, Sierras Pampeanas, Argentina
title_full_unstemmed Active deformation in the northern Sierra de Valle Fertil, Sierras Pampeanas, Argentina
title_sort Active deformation in the northern Sierra de Valle Fertil, Sierras Pampeanas, Argentina
dc.creator.none.fl_str_mv Ortiz, Gustavo Federico
Alvarado, Patricia Monica
Fosdick, Julie C.
Perucca, Laura Patricia A.
Saez, Mauro
Venerdini, Agostina Lia
author Ortiz, Gustavo Federico
author_facet Ortiz, Gustavo Federico
Alvarado, Patricia Monica
Fosdick, Julie C.
Perucca, Laura Patricia A.
Saez, Mauro
Venerdini, Agostina Lia
author_role author
author2 Alvarado, Patricia Monica
Fosdick, Julie C.
Perucca, Laura Patricia A.
Saez, Mauro
Venerdini, Agostina Lia
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Sierra Valle Fertil
Basement-Core Upflit
Thermochronology
Flat-Slab Subduction
topic Sierra Valle Fertil
Basement-Core Upflit
Thermochronology
Flat-Slab Subduction
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 Western Sierras Pampeanas region in the San Juan Province is characterized by thick-skinned deformation with approximately NeS trending ranges of average heights of 2500 m and a high frequency occurrence of seismic activity. Its location to the east of the mainly thin-skinned tectonics of the Argentine Precordillera fold-and-thrust belt suggests that at 30S, deformation is concentrated in a narrow zone involving these two morphostructural units. In this paper, we present new apatite (UeTh)/He results (AHe) across the northern part of the Sierra de Valle Fertil (around 30S) and analyze them in aframework of thermochronologic available datasets. We found Pliocene AHe results for Carboniferous and Triassic strata in the northern Sierra de Valle Fertil consistent with the hypothesis of recent cooling and inferred erosional denudation concentrated along the northern end of this mountain range. Ouranalysis shows that this northern region may have evolved under different conditions than the central part of the Sierra de Valle Fertil. Previous studies have observed AHe ages consistent with Permian through Cretaceous cooling, indicating the middle part of the Sierra de Valle Fertil remained near surfacebefore the Pampean slab subduction flattening process. Those studies also obtained ~5 My cooling ages in the southern part of the Sierra de Valle Fertil, which are similar to our results in the northern end of the range. Taken together, these results suggest a pattern of young deformation in the northern and southern low elevation ends of the Sierra de Valle Fertil consistent with regions of high seismic activity, and Quaternary active faulting along the western-bounding thrust fault of the Sierra de Valle Fertil.
Fil: Ortiz, Gustavo Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Juan. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
Fil: Alvarado, Patricia Monica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Juan. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
Fil: Fosdick, Julie C.. Indiana University; Estados Unidos
Fil: Perucca, Laura Patricia A.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Juan. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
Fil: Saez, Mauro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Juan. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
Fil: Venerdini, Agostina Lia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Juan. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
description The Western Sierras Pampeanas region in the San Juan Province is characterized by thick-skinned deformation with approximately NeS trending ranges of average heights of 2500 m and a high frequency occurrence of seismic activity. Its location to the east of the mainly thin-skinned tectonics of the Argentine Precordillera fold-and-thrust belt suggests that at 30S, deformation is concentrated in a narrow zone involving these two morphostructural units. In this paper, we present new apatite (UeTh)/He results (AHe) across the northern part of the Sierra de Valle Fertil (around 30S) and analyze them in aframework of thermochronologic available datasets. We found Pliocene AHe results for Carboniferous and Triassic strata in the northern Sierra de Valle Fertil consistent with the hypothesis of recent cooling and inferred erosional denudation concentrated along the northern end of this mountain range. Ouranalysis shows that this northern region may have evolved under different conditions than the central part of the Sierra de Valle Fertil. Previous studies have observed AHe ages consistent with Permian through Cretaceous cooling, indicating the middle part of the Sierra de Valle Fertil remained near surfacebefore the Pampean slab subduction flattening process. Those studies also obtained ~5 My cooling ages in the southern part of the Sierra de Valle Fertil, which are similar to our results in the northern end of the range. Taken together, these results suggest a pattern of young deformation in the northern and southern low elevation ends of the Sierra de Valle Fertil consistent with regions of high seismic activity, and Quaternary active faulting along the western-bounding thrust fault of the Sierra de Valle Fertil.
publishDate 2015
dc.date.none.fl_str_mv 2015-09
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/11336/6643
Ortiz, Gustavo Federico; Alvarado, Patricia Monica; Fosdick, Julie C.; Perucca, Laura Patricia A.; Saez, Mauro; et al.; Active deformation in the northern Sierra de Valle Fertil, Sierras Pampeanas, Argentina; Elsevier; Journal of South American Earth Sciences; 64; 2; 9-2015; 339-350
0895-9811
url http://hdl.handle.net/11336/6643
identifier_str_mv Ortiz, Gustavo Federico; Alvarado, Patricia Monica; Fosdick, Julie C.; Perucca, Laura Patricia A.; Saez, Mauro; et al.; Active deformation in the northern Sierra de Valle Fertil, Sierras Pampeanas, Argentina; Elsevier; Journal of South American Earth Sciences; 64; 2; 9-2015; 339-350
0895-9811
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0895981115300523
info:eu-repo/semantics/altIdentifier/doi/
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2015.08.015
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
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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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