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Ordovician cataclasite bands in the tambillo monzogranite: Expression of an early subphase of the ocloyic movements in the cordón Lila, northern Chile

Citation

Palacios Herrera, MJ and Niemeyer, H and Meffre, S, Ordovician cataclasite bands in the tambillo monzogranite: Expression of an early subphase of the ocloyic movements in the cordon Lila, northern Chile, Andean Geology, 40, (3) pp. 561-570. ISSN 0718-7092 (2013) [Refereed Article]


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Copyright Statement

Copyright 2013 Andean Geology

DOI: doi:10.5027/andgeoV40n3-a09

Abstract

Two 'conjugate' systems of subvertical ordovician cataclastic bands of metric wide and whose strike are northeast and northwest are studied in the eastern border of Tambillo Monzogranite, also of Ordovician age. The northeastern system is the most conspicuous and its kinematic analysis shows sinistral displacement. The northwestern system is dextral and offsets the northeastern system. The two directions of bands form approximately right angle suggesting that they formed from joints after the Tambillo Monzogranite cooled. The spatial pattern of the cataclastic bands is fractal. It is suggested a north-south orientation for σ1. Cataclasis occurred during the Late Tremadocian and could attain the Darriwillian and it is assigned to an early subphase of the Ocloyic movements. A number of granodioritic dykes intruded along the bands that were weak zones used for their emplacement.

Item Details

Item Type:Refereed Article
Keywords:cataclasites, Ordovician, Ocloyic movements, Cordón de Lila, Atacama, Chile
Research Division:Earth Sciences
Research Group:Geology
Research Field:Geochronology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:Meffre, S (Dr Sebastien Meffre)
ID Code:87894
Year Published:2013
Deposited By:Centre for Ore Deposit Research - CODES CoE
Deposited On:2013-12-14
Last Modified:2015-03-25
Downloads:2 View Download Statistics

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