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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2003
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v58_n4_p541_Vujovich http://hdl.handle.net/20.500.12110/paper_00044822_v58_n4_p541_Vujovich |
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paper:paper_00044822_v58_n4_p541_Vujovich2023-06-08T14:25:42Z Evidence of the Pampean cycle in the basament of the north-western sector of Sierra de San Luis 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. 2003 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v58_n4_p541_Vujovich 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 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. |
| 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 |
| publishDate |
2003 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v58_n4_p541_Vujovich http://hdl.handle.net/20.500.12110/paper_00044822_v58_n4_p541_Vujovich |
| _version_ |
1768544157530324992 |