Evidence of the Pampean cycle in the basament of the north-western sector of Sierra de San Luis

A preliminary zircon U-Pb age is presented for a feldspar-biotite gneiss from the Nogoli Metamorphic Complex, Sierra de San Luis, at San Francisco del Monte de Oro. The data show a cristallization age of 554 ± 4,8 Ma, which represents one of the first evidences of the Pampean Cycle in this geologica...

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Detalles Bibliográficos
Autores principales:	Vujovich, G.I., Ostera, H.A.
Formato:	JOUR
Materias:	Pampean cycle San Luis Range Sierras Pampeanas U-Pb ages Zircons crystallization gneiss metamorphic facies Proterozoic uranium-lead dating zircon Argentina San Luis Sierra de San Luis South America Western Hemisphere World
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00044822_v58_n4_p541_Vujovich
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00044822_v58_n4_p541_Vujovich
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spelling	todo:paper_00044822_v58_n4_p541_Vujovich2023-10-03T13:57:50Z Evidence of the Pampean cycle in the basament of the north-western sector of Sierra de San Luis Vujovich, G.I. Ostera, H.A. Pampean cycle San Luis Range Sierras Pampeanas U-Pb ages Zircons crystallization gneiss metamorphic facies Proterozoic uranium-lead dating zircon Argentina San Luis Sierra de San Luis South America Western Hemisphere World A preliminary zircon U-Pb age is presented for a feldspar-biotite gneiss from the Nogoli Metamorphic Complex, Sierra de San Luis, at San Francisco del Monte de Oro. The data show a cristallization age of 554 ± 4,8 Ma, which represents one of the first evidences of the Pampean Cycle in this geological setting. An episodic lead loss for Cretaceous times (112 ± 23 Ma) is postulated, based on the lower intercept of the discordia line. This age could be associated with anomalous thermal gradients due the extensional and rifting processes which affected Gondwana during the opening of the South Atlantic Ocean. © 2003 Asociacón Geológica Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v58_n4_p541_Vujovich
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Pampean cycle San Luis Range Sierras Pampeanas U-Pb ages Zircons crystallization gneiss metamorphic facies Proterozoic uranium-lead dating zircon Argentina San Luis Sierra de San Luis South America Western Hemisphere World
spellingShingle	Pampean cycle San Luis Range Sierras Pampeanas U-Pb ages Zircons crystallization gneiss metamorphic facies Proterozoic uranium-lead dating zircon Argentina San Luis Sierra de San Luis South America Western Hemisphere World Vujovich, G.I. Ostera, H.A. Evidence of the Pampean cycle in the basament of the north-western sector of Sierra de San Luis
topic_facet	Pampean cycle San Luis Range Sierras Pampeanas U-Pb ages Zircons crystallization gneiss metamorphic facies Proterozoic uranium-lead dating zircon Argentina San Luis Sierra de San Luis South America Western Hemisphere World
description	A preliminary zircon U-Pb age is presented for a feldspar-biotite gneiss from the Nogoli Metamorphic Complex, Sierra de San Luis, at San Francisco del Monte de Oro. The data show a cristallization age of 554 ± 4,8 Ma, which represents one of the first evidences of the Pampean Cycle in this geological setting. An episodic lead loss for Cretaceous times (112 ± 23 Ma) is postulated, based on the lower intercept of the discordia line. This age could be associated with anomalous thermal gradients due the extensional and rifting processes which affected Gondwana during the opening of the South Atlantic Ocean. © 2003 Asociacón Geológica Argentina.
format	JOUR
author	Vujovich, G.I. Ostera, H.A.
author_facet	Vujovich, G.I. Ostera, H.A.
author_sort	Vujovich, G.I.
title	Evidence of the Pampean cycle in the basament of the north-western sector of Sierra de San Luis
title_short	Evidence of the Pampean cycle in the basament of the north-western sector of Sierra de San Luis
title_full	Evidence of the Pampean cycle in the basament of the north-western sector of Sierra de San Luis
title_fullStr	Evidence of the Pampean cycle in the basament of the north-western sector of Sierra de San Luis
title_full_unstemmed	Evidence of the Pampean cycle in the basament of the north-western sector of Sierra de San Luis
title_sort	evidence of the pampean cycle in the basament of the north-western sector of sierra de san luis
url	http://hdl.handle.net/20.500.12110/paper_00044822_v58_n4_p541_Vujovich
work_keys_str_mv	AT vujovichgi evidenceofthepampeancycleinthebasamentofthenorthwesternsectorofsierradesanluis AT osteraha evidenceofthepampeancycleinthebasamentofthenorthwesternsectorofsierradesanluis
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Evidence of the Pampean cycle in the basament of the north-western sector of Sierra de San Luis

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