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Yong-Beom Lee, Ji-Min Lee, Do-Haeng Hur, Jong-Hyeon Lee and Soon-Hyeok Jeon
Ethanolamine (ETA) is widely used to control the pH value in the secondary water of pressurized water reactors. However, it is necessary to consider other advanced amines which can replace ETA due to its serious human hazards and environmental treatment ...
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Waldo Vivallo,Fernando Henriquez,Sergio Espinoza
Pág. 159 - 175
RESUMEN. Las menas de hierro de los distritos ferriferos Cerro Negro Norte y Cerro Iman, pertenecientes a la Franja Ferrifera Cretacica de la Cordillera de la Costa de Chile, se encuentran fuertemente enriquecidas en Au con respecto a las rocas volcanica...
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Waldo Vivallo,Fernando Henriquez,Sergio Espinoza
Pág. 159 - 175
RESUMEN. Las menas de hierro de los distritos ferriferos Cerro Negro Norte y Cerro Iman, pertenecientes a la Franja Ferrifera Cretacica de la Cordillera de la Costa de Chile, se encuentran fuertemente enriquecidas en Au con respecto a las rocas volcanica...
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Demetrios G. Eliopoulos, Maria Economou-Eliopoulos and Maria Zelyaskova-Panayiotova
Porphyry Cu?Au?Pd±Pt deposits are significant Au resources, but their Pd and Pt potential is still unknown. Elevated Pd, Pt (hundreds of ppb) and Au contents are associated with typical stockwork magnetite-bornite-chalcopyrite assemblages, at the central...
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Abdallah Atef, Adel A. Surour, Ahmed A. Madani and Mokhles K. Azer
Since Antiquity, sustainable resources of gold and copper have been mined at two prominent prospects in the north Eastern Desert of Egypt, namely the south Gabel Um Monqul (SGUM) and Gabal Al Kharaza (GKZ). Mineralization is hosted by Neoproterozoic shie...
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Ahmed S. Aljohani, Khaled I. Ahmed, Saeed Asiri and Mohamed H. Ahmed
Water wall tube temperature is a major parameter in the steam generator design which has a significant role in keeping the steam generator available. Thus, knowing the tube average temperature in different operating conditions is very important to avoid ...
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Stanislaw Z. Mikulski, Katarzyna Sadlowska, Janina Wiszniewska and Rafal Malek
On the basis of geochemical whole-rock and mineralogical point analyses, the concentrations of V and Co were determined in magnetite-ilmenite oxide ores, associated with sulphides, at the Krzemianka and Udryn deposits in the Mesoproterozoic Suwalki Anort...
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Soon-Hyeok Jeon, Won-Ik Choi, Geun-Dong Song, Yeong-Ho Son and Do Haeng Hur
In this work, we investigated the effects of surface roughness and agitation on the morphology of magnetite films electrodeposited from alkaline Fe(III)-triethanolamine (TEA) solutions on carbon steel substrates. The surface roughness of the carbon steel...
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Luis E. Lara,Jose A. Naranjo,Hugo Moreno
Pág. 241 - 258
Lanín volcano is a compound stratocone, mainly effusive, made up by four units defined through morphological criteria. The first unit represents an ancient volcano; the youngest three units form the present stratocone built since the Middle-Late Pleistoc...
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Jose Perello,Jose Cabello
Pág. 73 - 92
RESUMEN. El analisis de 47 depositos tipo porfido cuprifero, considerados anomalos en oro (leyes ~0,3 ppm Au) revela que sus reservas son variables entre los 3 mil millones de toneladas con leyes de 0,8% Cu; 0,31 ppm Au y 5 millones de toneladas con leye...
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Francisco Camus,Ricardo Soric,Milka Alexandra Skewes
RESUMEN:The El Bronce gold district is located in Central Chile (32°11'S-70°56'W), and contains epithermal polimetallic (Au, Ag, Cu, Pb, Zn) vein deposits. The district has been mined since the end of the 18th century and its estimated production up to t...
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Sabrina Nazzareni, Simona Alunno, Federica Zaccarini, Michele Mattioli, Alessandro Murroni, Alessandro Di Michele and Alberto Renzulli
The Murcielago gold placer is located in the Lepaguare Valley, Olancho Department (Central Honduras). The placer mineralogy includes silicates (quartz, garnets, amphibole, Ca-pyroxene, micas, epidote, and tourmaline); calcite; and in the heavy fraction, ...
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Jorge Eduardo Bustillos A., Jorge Eduardo Romero, Alicia Guevara C., Juan Díaz-Alvarado
Pág. 47 - 77
The Tungurahua volcano (Northern Andean Volcanic Zone) has been erupting since 1999, with at least
four eruptive phases up to present. Although a dozen of research focuses in tephra fall deposits during this period, none
of them cover the full eruptive c...
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