Tectonic and unroofing history of Neogene Manatiales foreland basin deposits, Cordillera Frontal (32°30′S), San Juan Province, Argentina

The Miocene Manantiales foreland basin is located in Cordillera Frontal of San Juan, between 32°30′ and 33°S. The unroofing study of the synorogenic Miocene deposits provides information about the structural evolution of Cordón de La Ramada fold-and-thrust belt. These Tertiary deposits are represent...

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Autor principal: Pérez, D.J.
Formato: JOUR
Materias:
Argentina
Chinches Formation
Continental Miocene deposits
Cordillera Frontal
Cordillera Principal
Manantiales foreland basin
San Juan
Unroofing synorogenic deposits
cordillera
foreland basin
Neogene
tectonic evolution
unroofing
volcanism
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_08959811_v14_n7_p693_Perez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_08959811_v14_n7_p693_Perez2023-10-03T15:42:31Z Tectonic and unroofing history of Neogene Manatiales foreland basin deposits, Cordillera Frontal (32°30′S), San Juan Province, Argentina Pérez, D.J. Argentina Chinches Formation Continental Miocene deposits Cordillera Frontal Cordillera Principal Manantiales foreland basin San Juan Unroofing synorogenic deposits cordillera foreland basin Neogene tectonic evolution unroofing volcanism Argentina The Miocene Manantiales foreland basin is located in Cordillera Frontal of San Juan, between 32°30′ and 33°S. The unroofing study of the synorogenic Miocene deposits provides information about the structural evolution of Cordón de La Ramada fold-and-thrust belt. These Tertiary deposits are represented by the Chinches Formation and comprise seven members (Tc0-Tc6). They are the result of the uplift of Mesozoic sequences that crop out in La Ramada fold-and-thrust belt of the Cordillera Principal. Quaternary deposits unconformably overlying the Chinches Formation are composed of granitic and rhyolitic blocks, and represent the final uplift of the Cordón del Espinacito and a series of out-of-sequence thrusts. The unroofing studies also provide sufficient information to establish the out-of-sequence timing of the deformation at this latitude. Initial deposition of the Tertiary deposits can be dated at about 20 Ma, or early Miocene. Andesitic lavas dated in 9.2 ± 0.3, 10.7 ± 0.7, and 12.7 ± 0.7 Ma unconformably overlie the structure of La Ramada fold-and-thrust belt. These facts constrain the uplift of the High Andes between 20 and 10 Ma at this latitude. The unconformity between Tertiary and Quaternary deposits suggests final uplift during Pliocene-Pleistocene times. © 2001 Elsevier Science Ltd. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_08959811_v14_n7_p693_Perez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Argentina
Chinches Formation
Continental Miocene deposits
Cordillera Frontal
Cordillera Principal
Manantiales foreland basin
San Juan
Unroofing synorogenic deposits
cordillera
foreland basin
Neogene
tectonic evolution
unroofing
volcanism
Argentina
spellingShingle Argentina
Chinches Formation
Continental Miocene deposits
Cordillera Frontal
Cordillera Principal
Manantiales foreland basin
San Juan
Unroofing synorogenic deposits
cordillera
foreland basin
Neogene
tectonic evolution
unroofing
volcanism
Argentina
Pérez, D.J.
Tectonic and unroofing history of Neogene Manatiales foreland basin deposits, Cordillera Frontal (32°30′S), San Juan Province, Argentina
topic_facet Argentina
Chinches Formation
Continental Miocene deposits
Cordillera Frontal
Cordillera Principal
Manantiales foreland basin
San Juan
Unroofing synorogenic deposits
cordillera
foreland basin
Neogene
tectonic evolution
unroofing
volcanism
Argentina
description The Miocene Manantiales foreland basin is located in Cordillera Frontal of San Juan, between 32°30′ and 33°S. The unroofing study of the synorogenic Miocene deposits provides information about the structural evolution of Cordón de La Ramada fold-and-thrust belt. These Tertiary deposits are represented by the Chinches Formation and comprise seven members (Tc0-Tc6). They are the result of the uplift of Mesozoic sequences that crop out in La Ramada fold-and-thrust belt of the Cordillera Principal. Quaternary deposits unconformably overlying the Chinches Formation are composed of granitic and rhyolitic blocks, and represent the final uplift of the Cordón del Espinacito and a series of out-of-sequence thrusts. The unroofing studies also provide sufficient information to establish the out-of-sequence timing of the deformation at this latitude. Initial deposition of the Tertiary deposits can be dated at about 20 Ma, or early Miocene. Andesitic lavas dated in 9.2 ± 0.3, 10.7 ± 0.7, and 12.7 ± 0.7 Ma unconformably overlie the structure of La Ramada fold-and-thrust belt. These facts constrain the uplift of the High Andes between 20 and 10 Ma at this latitude. The unconformity between Tertiary and Quaternary deposits suggests final uplift during Pliocene-Pleistocene times. © 2001 Elsevier Science Ltd. All rights reserved.
format JOUR
author Pérez, D.J.
author_facet Pérez, D.J.
author_sort Pérez, D.J.
title Tectonic and unroofing history of Neogene Manatiales foreland basin deposits, Cordillera Frontal (32°30′S), San Juan Province, Argentina
title_short Tectonic and unroofing history of Neogene Manatiales foreland basin deposits, Cordillera Frontal (32°30′S), San Juan Province, Argentina
title_full Tectonic and unroofing history of Neogene Manatiales foreland basin deposits, Cordillera Frontal (32°30′S), San Juan Province, Argentina
title_fullStr Tectonic and unroofing history of Neogene Manatiales foreland basin deposits, Cordillera Frontal (32°30′S), San Juan Province, Argentina
title_full_unstemmed Tectonic and unroofing history of Neogene Manatiales foreland basin deposits, Cordillera Frontal (32°30′S), San Juan Province, Argentina
title_sort tectonic and unroofing history of neogene manatiales foreland basin deposits, cordillera frontal (32°30′s), san juan province, argentina
url http://hdl.handle.net/20.500.12110/paper_08959811_v14_n7_p693_Perez
work_keys_str_mv AT perezdj tectonicandunroofinghistoryofneogenemanatialesforelandbasindepositscordillerafrontal3230ssanjuanprovinceargentina
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