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Diego Palma,Sebastián Jovic,Luciano López,Diego Guido,Gerardo Páez,Facundo De Martino,Gustavo Sotarello,Pablo Rolando
Pág. 387 - 402
The Casposo District is located in the Cordillera Frontal, in the center-west of San Juan Province, Argentina. It is characterized by the presence of a low sulfidation epithermal system hosted in volcanic rocks of the Choiyoi Group, where the Mercado-Kam...
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Jorge E. Morales Leal,Andrew Menzies,Hans-G. Wilke,José Zuluaga
Pág. 185 - 207
The El Peñón low-sulfidation epithermal deposit, located in the Paleocene metallogenic belt in the Antofagasta region, northern Chile, consists of Au-Ag bearing veins and hydrothermal breccias hosted in volcanic rocks and surrounded by alteration haloes ...
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Nathan A. Forsythe, Paul G. Spry and Michael L. Thompson
The Navilawa caldera is the remnant of a shoshonitic volcano on Viti Levu, Fiji, and sits adjacent to the low-sulfidation Tuvatu epithermal Au–Te deposit. The caldera occurs along the Viti Levu lineament, approximately 50 km SW of the Tavua caldera...
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Henrik Drake, Magnus Ivarsson, Mikael Tillberg, Martin J. Whitehouse and Ellen Kooijman
Recent studies reveal that organisms from all three domains of life—Archaea, Bacteria, and even Eukarya—can thrive under energy-poor, dark, and anoxic conditions at large depths in the fractured crystalline continental crust. There is a need ...
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Maria E. Vattuone,Carlos O. Latorre,Pablo R. Leal
Pág. 161 - 176
Ca-dachiardite is present in Cretaceous volcanic breccias affected by very low grade metamorphism. The cement of the breccia shows quartz, Ca-dachiardite, mordenite, cristobalite, calcite and siderite, while in the clasts there are pectolite, prehnite, y...
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Maria E. Vattuone,Carlos O. Latorre,Pablo R. Leal
Pág. 209 - 228
A metamorphic assemblage of very low grade metamorphism in Paleogene volcanic rocks from the Andesitic Formation, Confluencia, Neuquén Province, is studied. The protolith is basaltic and andesitic. The secondary minerals are calcic, calcosodic and sodic ...
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Leandro E. Echavarria,Ricardo O. Etcheverry
Pág. 69 - 83
This paper is devoted to the geochemistry of lodes and host rocks from the El Dorado-Monserrat epithermal Au-Ag deposits. The distribution haloes of the studied metals show great variations as demonstrated by the coss-cut sections through the host rocks....
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Alvaro Puig,Sergio Diaz,Lucia Cuitino
Pág. 57 - 82
Resumen. Los yacimientos epitermales El Guanaco (Au, Cu), Cachinal de La Sierra (Ag) y El Soldado (Ag), ubicados entre 24°52'-25°06' y 69°32'W, estan geneticamente relacionados con un sistema de calderas anidadas del Paleoceno-Eoceno Inferior. Las rocas ...
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