Petrología y análisis geométrico y tectónico de las milonitas de la Sierra de Copacabaña, provincia de Catamarca, República Argentina

J. P. López

doi:10.3989/egeol.92485-6400

Petrología y análisis geométrico y tectónico de las milonitas de la Sierra de Copacabaña, provincia de Catamarca, República Argentina

Authors

J. P. López Instituto Superior de Correlación Geológica, Universidad Nacional de Tucumán, Tucumán

DOI:

https://doi.org/10.3989/egeol.92485-6400

Keywords:

Sierras Pampeanas, Famatina Range, Lower Paleozoic, Cataclasite rocks, Petrography, Geotectonic

Abstract

A petrographic and structural study of units from Copacabana Range in the Northwestern Pampean Ranges is presented. Two facies of deformed granitoids were recognized. Rocks of both facies are classificated as mylonite schists, mylonite gneisses and protomylonites. First would have formed at temperature of 3500 C and 15 km of deep. Protomylonite would have formed at lower temperatures and deeps. Undeformed granitoids and ortogneis are also descript.

Structural data and the analysis of some kinematic indicators suggest that a main shear plane strikes NNW, inclined to the east, with vergence to the west. Geometric analysis, realized in base to petrographic diagrams of c-axis of quartz and mica cleavage suggest an orthorhombic fabric.

Downloads

Download data is not yet available.

Downloads

Published

1992-12-30

How to Cite

López, J. P. (1992). Petrología y análisis geométrico y tectónico de las milonitas de la Sierra de Copacabaña, provincia de Catamarca, República Argentina. Estudios Geológicos, 48(5-6), 335–340. https://doi.org/10.3989/egeol.92485-6400

Download Citation

Issue

Vol. 48 No. 5-6 (1992)

Section

Articles

License

This work is licensed under a Creative Commons Attribution 4.0 International License.

© CSIC. Manuscripts published in both the printed and online versions of this Journal are the property of Consejo Superior de Investigaciones Científicas, and quoting this source is a requirement for any partial or full reproduction.

All contents of this electronic edition, except where otherwise noted, are distributed under a “Creative Commons Attribution 4.0 International” (CC BY 4.0) License. You may read here the basic information and the legal text of the license. The indication of the CC BY 4.0 License must be expressly stated in this way when necessary.

Self-archiving in repositories, personal webpages or similar, of any version other than the published by the Editor, is not allowed.