The age of the Tunas formation in the Sauce Grande basin-Ventana foldbelt (Argentina): Implications for the Permian evolution of the southwestern margin of Gondwana

New SHRIMP radiogenic isotope dating on zircons in tuffs (280.8±1.9 Ma) confirms the Early Permian (Artinskian) age of the uppermost section of the Tunas Formation. Tuff-rich levels in the Tunas Formation are exposed in the Ventana foldbelt of central Argentina; they are part of a deltaic to fluvial...

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Autores principales: López Gamundi, Oscar Raúl, Rossello, Eduardo Antonio
Publicado: 2013
Materias:
Gondwana
Permian
Plate margin volcanism
Tuffs
fold belt
foreland basin
geochronology
paleoclimate
plate boundary
SHRIMP dating
tuff
volcanism
zircon
Argentina
Buenos Aires [Argentina]
Sauce Grande River
Scombridae
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v45_n_p250_LopezGamundi
http://hdl.handle.net/20.500.12110/paper_08959811_v45_n_p250_LopezGamundi
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_08959811_v45_n_p250_LopezGamundi
record_format dspace
spelling paper:paper_08959811_v45_n_p250_LopezGamundi2023-06-08T15:48:41Z The age of the Tunas formation in the Sauce Grande basin-Ventana foldbelt (Argentina): Implications for the Permian evolution of the southwestern margin of Gondwana López Gamundi, Oscar Raúl Rossello, Eduardo Antonio Gondwana Permian Plate margin volcanism Tuffs fold belt foreland basin geochronology Gondwana paleoclimate Permian plate boundary SHRIMP dating tuff volcanism zircon Argentina Buenos Aires [Argentina] Sauce Grande River Scombridae New SHRIMP radiogenic isotope dating on zircons in tuffs (280.8±1.9 Ma) confirms the Early Permian (Artinskian) age of the uppermost section of the Tunas Formation. Tuff-rich levels in the Tunas Formation are exposed in the Ventana foldbelt of central Argentina; they are part of a deltaic to fluvial section corresponding to the late overfilled stage of the Late Paleozoic Sauce Grande foreland basin. Recent SHRIMP dating of zircons from the basal Choiyoi volcanics exposed in western Argentina yielded an age of 281.4±2.5 Ma (Rocha-Campos etal., 2011). The new data for the Tunas tuffs suggest that the volcanism present in the Sauce Grande basin can be considered as the distal equivalent of the earliest episodes of the Choiyoi volcanism of western Argentina. From the palaeoclimatic viewpoint the new Tunas SHRIMP age confirms that by early Artinskian glacial conditions ceased in the Sauce Grande basin and, probably, in adajacent basins in western Gondwana. © 2013 Elsevier Ltd. Fil:López-Gamundí, O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Rossello, E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v45_n_p250_LopezGamundi http://hdl.handle.net/20.500.12110/paper_08959811_v45_n_p250_LopezGamundi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Gondwana
Permian
Plate margin volcanism
Tuffs
fold belt
foreland basin
geochronology
Gondwana
paleoclimate
Permian
plate boundary
SHRIMP dating
tuff
volcanism
zircon
Argentina
Buenos Aires [Argentina]
Sauce Grande River
Scombridae
spellingShingle Gondwana
Permian
Plate margin volcanism
Tuffs
fold belt
foreland basin
geochronology
Gondwana
paleoclimate
Permian
plate boundary
SHRIMP dating
tuff
volcanism
zircon
Argentina
Buenos Aires [Argentina]
Sauce Grande River
Scombridae
López Gamundi, Oscar Raúl
Rossello, Eduardo Antonio
The age of the Tunas formation in the Sauce Grande basin-Ventana foldbelt (Argentina): Implications for the Permian evolution of the southwestern margin of Gondwana
topic_facet Gondwana
Permian
Plate margin volcanism
Tuffs
fold belt
foreland basin
geochronology
Gondwana
paleoclimate
Permian
plate boundary
SHRIMP dating
tuff
volcanism
zircon
Argentina
Buenos Aires [Argentina]
Sauce Grande River
Scombridae
description New SHRIMP radiogenic isotope dating on zircons in tuffs (280.8±1.9 Ma) confirms the Early Permian (Artinskian) age of the uppermost section of the Tunas Formation. Tuff-rich levels in the Tunas Formation are exposed in the Ventana foldbelt of central Argentina; they are part of a deltaic to fluvial section corresponding to the late overfilled stage of the Late Paleozoic Sauce Grande foreland basin. Recent SHRIMP dating of zircons from the basal Choiyoi volcanics exposed in western Argentina yielded an age of 281.4±2.5 Ma (Rocha-Campos etal., 2011). The new data for the Tunas tuffs suggest that the volcanism present in the Sauce Grande basin can be considered as the distal equivalent of the earliest episodes of the Choiyoi volcanism of western Argentina. From the palaeoclimatic viewpoint the new Tunas SHRIMP age confirms that by early Artinskian glacial conditions ceased in the Sauce Grande basin and, probably, in adajacent basins in western Gondwana. © 2013 Elsevier Ltd.
author López Gamundi, Oscar Raúl
Rossello, Eduardo Antonio
author_facet López Gamundi, Oscar Raúl
Rossello, Eduardo Antonio
author_sort López Gamundi, Oscar Raúl
title The age of the Tunas formation in the Sauce Grande basin-Ventana foldbelt (Argentina): Implications for the Permian evolution of the southwestern margin of Gondwana
title_short The age of the Tunas formation in the Sauce Grande basin-Ventana foldbelt (Argentina): Implications for the Permian evolution of the southwestern margin of Gondwana
title_full The age of the Tunas formation in the Sauce Grande basin-Ventana foldbelt (Argentina): Implications for the Permian evolution of the southwestern margin of Gondwana
title_fullStr The age of the Tunas formation in the Sauce Grande basin-Ventana foldbelt (Argentina): Implications for the Permian evolution of the southwestern margin of Gondwana
title_full_unstemmed The age of the Tunas formation in the Sauce Grande basin-Ventana foldbelt (Argentina): Implications for the Permian evolution of the southwestern margin of Gondwana
title_sort age of the tunas formation in the sauce grande basin-ventana foldbelt (argentina): implications for the permian evolution of the southwestern margin of gondwana
publishDate 2013
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v45_n_p250_LopezGamundi
http://hdl.handle.net/20.500.12110/paper_08959811_v45_n_p250_LopezGamundi
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