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Artículo

Mineralogy, structural control and age of the Incachule Sb epithermal veins, the Cerro Aguas Calientes collapse caldera, Central Puna

Salado Paz, NataliaIcon ; Petrinovic, Ivan AlejandroIcon ; Do Campo, Margarita DianaIcon ; Brod, José Affonso; Nieto, Fernando; Souza, Valmir Da Silva; Wemmer, Klaus; Payrola Bosio, Patricio AugustoIcon ; Ventura, Roberto
Fecha de publicación: 03/2018
Editorial: Pergamon-Elsevier Science Ltd
Revista: Journal of South American Earth Sciences
ISSN: 0895-9811
Idioma: Inglés
Tipo de recurso: Artículo publicado

Resumen

The Incachule Sb epithermal veins is located near to the N-E rim of the Cerro Aguas Calientes collapse caldera (17.5-10.8 Ma), in the geologic province of Puna, Salta- Argentina. It is hosted in Miocene felsic volcanic rocks with continental arc signature. The district includes twelve vein systems with mineralization of Sb occurring in hydrothermal breccias and stockwork. The veins are composed of quartz-sulfide with pyrite, stibnite and arsenopyrite. All around the veins, wall rocks are variably altered to clay minerals and sulfates in an area of around 2.5 km wide by more than 7 km long. The hydrothermal alterations recognized are: silicic, phyllic and argillic.The veins are characterized by high contents of Sb, As, and Tl and intermediate contents of Pb-Zn-Cu, and traces of Ag and Au. Homogenization and ice-melting temperatures of fluid inclusions vary from 125 °C to 189 °C and -2.4 °C to -0.8 °C. The isotopic data indicated a range of δ34S -3.04‰ to +0.72‰ consistent with a magmatic source for sulfur.We present the firsts K-Ar ages for hydrothermal illite/smectite mixed layers (I/SR1, 60% illite layers) and illite that constrain the age of the ore deposit (8.5-6.7 ± 0.2 Ma).The data shown here, let characterized the Incachule district as a shallow low sulfidation epithermal system hosted in a collapse caldera. Our data also indicate that mineralization is structurally controlled by a fault system related to the 10.3 Ma collapse of Aguas Calientes caldera. The interpreted local stress field is consistent with the regional one.
Palabras clave: Collapse Caldera , Epithermal , Hydrothermal Breccia , Low Sulfidation
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/45890
URL: http://linkinghub.elsevier.com/retrieve/pii/S0895981117301402
DOI: https://doi.org/10.1016/j.jsames.2017.07.002
Colecciones
Articulos(CICTERRA) [565]
Articulos de CENTRO DE INVEST.EN CS.DE LA TIERRA
Citación
Salado Paz, Natalia; Petrinovic, Ivan Alejandro; Do Campo, Margarita Diana; Brod, José Affonso; Nieto, Fernando; et al.; Mineralogy, structural control and age of the Incachule Sb epithermal veins, the Cerro Aguas Calientes collapse caldera, Central Puna; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 82; 3-2018; 239-260
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