Relaciones isotópicas Sm/Nd en rocas graníticas y miloníticas de Sierras Pampeanas del noroeste Argentino

J. P. López; M. M. Rodríguez Areal; A. Sales; K. Kawashita

doi:10.3989/egeol.05611-236

Relaciones isotópicas Sm/Nd en rocas graníticas y miloníticas de Sierras Pampeanas del noroeste Argentino

Authors

J. P. López Instituto Superior de Correlación Geológica, Universidad Nacional de Tucumán
M. M. Rodríguez Areal Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán
A. Sales Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán
K. Kawashita Universidade Federal de Rio Grande do Sul, Porto Alegre-RS

DOI:

https://doi.org/10.3989/egeol.05611-236

Keywords:

Pampean Ranges, Northwestern Argentina, Famatinian Cycle, TIPA shear zone, Sm/Nd age

Abstract

The Velasco, Copacabana and Paimán Ranges in Sierras Pampeanas, are constituted mainly by paleozoic plutonic bodies of the Famatinian cycle (Huaco, Antinaco and Paimán) and for mylonitic rocks (TIPA Shear Zone), originated as a consequence of dynamic events happening during the Upper Ordovician-Devonian. The last magmatic event of the area would probably have of devonian age (Granite San Blas). Model-ages of two stages were calculated based on 147Sm/144Nd relationships; the obtained values are closely grouped at around 1594 Ma. and the more plausible interpretation seems to be a reworking of an Early Proterozoic protolith.

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Published

2005-04-30

How to Cite

López, J. P., Rodríguez Areal, M. M., Sales, A., & Kawashita, K. (2005). Relaciones isotópicas Sm/Nd en rocas graníticas y miloníticas de Sierras Pampeanas del noroeste Argentino. Estudios Geológicos, 61(1-2), 3–8. https://doi.org/10.3989/egeol.05611-236

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Issue

Vol. 61 No. 1-2 (2005)

Section

Articles

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