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Hugo Moreno R.
Pág. 589 - 590
Obituario Leopoldo López.
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Silke Lohmar,Claude Robin,Alain Gourgaud,Jorge Clavero,Miguel angel Parada,Hugo Moreno,Orkun Ersoy,Leopoldo Lopez-Escobar,Jose Antonio Naranjo
Pág. 233 - 248
Villarrica is an active stratovolcano located in the Southern Andean Volcanic Zone. About 13,800 years BP (conventional radiocarbon ages), this volcano experienced major explosive eruptions which resulted in the emission of a sequence of pyroclastic flow...
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Mario Vergara,Diego Morata,Rosemary Hickey-Vargas,Leopoldo Lopez-Escobar,Ingrid Beccar
Pág. 23 - 41
Upper Eocene to Middle Miocene volcanic rocks are found in the Colbún area, Linares Precordillera, central Chile (35º35'-36ºS). Based on stratigraphic characteristics, K-Ar and Ar-Ar dating, two different units are recognized: 1-a Lower Unit (Upper Eocen...
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Leopoldo Lopez-Escobar,Mario Vergara
Pág. 227 - 244
ABSTRACT. The Southern Andes Eocene-Miocene volcanism comprises a series of paleo-volcanic belts striking N-S to N10°E. Along the longitudinal depression of central-south Chile, remnants of this volcanism are distributed between about 33° and 42.5°S. Bas...
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Leopoldo Lopez-Escobar,Jose Cembrano,Hugo Moreno
Pág. 219 - 234
ABSTRACT. Between latitudes 37° and 46°S of the Andes, the Nazca-South America Plate convergence is currently slightly oblique, Postglacial volcanism has been continuous and intense, being expressed as numerous composite stratovolcanoes (SV) and hundreds...
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Leopoldo Lopez-Escobar,Rolf Kilian,Pamela D. Kempton,Michio Tagiri
Pág. 33 - 55
RESUMEN. Petrografia y geoquimica de rocas cuaternarias de la Zona Volcanica Sur de los Andes entre los 41°30? y 46°00?S, Chile. Los centros volcanicos del frente cuaternario de la Zona Volcanica Sur (ZVS) de los Andes, ubicados entre las latitudes 41°30...
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Leopoldo Lopez-Escobar,Miguel A. Parada,Hugo Moreno,Fred A. Frey,Rosemary L. Hickey-Vargas
Pág. 211 - 226
RESUMEN. Contribucion a la petrogenesis de los volcanes Osorno y Calbuco, Andes del Sur (41°00'-41°30'S): estudio comparativo. Los volcanes Osorno y Calbuco, ubicados respectivamente en las latitudes 41°05'S y 41°20'S de la region sur de la Zona Volcani...
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Gerhardt Worner,Leopoldo Lopez-Escobar,Stephen Moorbath,Susan Horn,Jürgen Entenmann,Russel S. Harmon ,Jon D. Davidson
Pág. 37 - 56
ABSTRACT. Local and regional geochemical variations in the quaternary volcanic front of the central Andes (17°30'-22°00'S), northern Chile. Geochemical data, obtained in samples from the 17°30'-22°00'S sector of the Quaternary volcanic front of the Centr...
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Daniel Tormey,Paulina Schuller,Leopoldo Lopez-Escobar,Frederick Frey
Pág. 165 - 175
This is a two part study of recent lavas Irom the Southern Volcanic Zone (SVZ) of the Andes (33-46°S). In the first part, radioactive equilibrium between 238U and 230Th was tested by analyzing 9 samples from historic eruptions for 230Th/232Th activity ra...
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