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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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Isabela Echeverry Peñón, Santiago Reyes Ortega
Pág. 231 - 249
This paper presents evidence on the role of the endowment effect in shaping the risk-taking behavior of entrepreneurs, and how the potential of losing their firms lead them to take higher risks. This study uses an experimental design with 466 entrepreneu...
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Ricardo A. Astini,Federico Martina,Federico M. Davila
Pág. 245 - 267
In the northern part of the Argentine Precordillera, northwestern La Rioja, the Upper Paleozoic is over 4,000 m thick. Very coarse conglomerates from the basal section have not been described nor adequately interpreted. This work analyses this unit in th...
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Thomas Bissig,Daisy Donoso,Nelson C. Guerra,Gregory M. Dipple
Pág. 291 - 304
Carbonate minerals are common gangue minerals in the low sulfidation epithermal Au-Ag District of El Peñón, II Región, Chile. They can be subdivided into two principal groups on the basis of the paragenetic relationships. Paragenetically early carbonates...
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Juan José Gaitán,Eduardo Augusto Penón,María Cristina Costa
Pág. 33 - 41
El objetivo del presente trabajo fue determinar la distribución vertical de la densidad de raíces finas (hasta 2 mm de diámetro) de Eucalyptus globulus ssp. maidenii y su relación con algunas propiedades del suelo hasta una profundidad de 0,5 m. Las raíc...
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Ricardo Varela,Ana M. Sato,Miguel A.S. Basei,Oswaldo Siga Jr.
Pág. 265 - 284
Igneous and metamorphic units formed mainly during the Middle Proterozoic and Early Paleozoic times have been distinguished in the Sierra de Umango crystalline basement. These include granitic orthogneisses, a sequence of schists and marbles, amphibolite...
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Miguel A. Galliski,Julio Saavedra,Maria F. Marquez-Zavalia
Pág. 125 - 137
This study describes the physical and optical properties, polytypism, chemical composition and paragenesis of a Li-Al-bearing mica suite from the northernmost pegmatite field of Pampean Pegmatite Province. The micas are from two possible cogenetic rare-e...
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J. B. Hebrard, A. Gresy, J. Percillier
Pág. 21 - 31
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