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José Alfredo Flores Ronces, Edith R. Salcedo Sánchez, Manuel Martínez Morales, Juan Manuel Esquivel Martínez, Oscar Talavera Mendoza and María Vicenta Esteller Alberich
The Taxco mining district is a well-known international producer of silver, jewelry, and precious metal handicrafts. Inappropriate disposal wastes from anthropogenic activities have been deteriorating the hydric resources and threatening the inhabitants?...
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Alba Patrizia Santo
The Tuscany Magmatic Province consists of a Miocene to Pleistocene association of a wide variety of rock types, including peraluminous crustal anatectic granites and rhyolites, calcalkaline and shoshonitic suites and ultrapotassic lamproites. In addition...
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José Antonio Naranjo,Francisco Hevia,Edmundo Polanco
Pág. 514 - 528
The Mondaca Volcano comprises a thick rhyolitic lava-field and a dome of similar composition, located near the Lontué River Valley headwaters in the northern part of the Southern Andes Volcanic Zone. It reaches a total volume of ~0.85 km3, and it is for...
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Ibrahim M. Ahmed, Mohamed Jalludin and Moumtaz Razack
The hydrogeological system of the Goda Mountains Range (GMR) in the Republic of Djibouti (Horn of Africa), hosted by volcanic and sedimentary formations, is the only water resource in the Tadjourah region for more than 85,000 inhabitants. Water needs are...
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Mihaela Toderas, Roland Iosif Moraru, Ciprian Danciu, Grigore Buia and Lucian-Ionel Cioca
Geomechanical assessment of rocks requires knowledge of phenomena that occur under the influence of internal and external factors at a macroscopic or microscopic scale, when rocks are submitted to different actions. To elucidate the quantitative and qual...
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Beatriz Coira, Clara E. Cisterna, Horstpeter H. Ulbrich, Umberto G. Cordani
Pág. 105 - 126
The Las Lozas volcanic sequence, which crops out at northwestern border of the Famatina belt-southeastern
Puna, NW Argentina, is constituted mainly by rhyolites and a lesser volume of basalts and trachytes, and volcanoclastic
deposits. These rocks, previ...
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Álvaro Amigo,Luis E. Lara,Victoria C. Smith
Pág. 227 - 248
Tephra fall deposits and one large ignimbrite close to Chaitén and Michinmahuida Volcanoes were analyzed for chemistry and radiocarbon dated to correlate the eruptive units and establish the timing of eruptions. These data suggest that both volcanoes wer...
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Wes Hildreth,Judy Fierstein,Estanislao Godoy,Robert E. Drake,Brad Singer
Pág. 275 - 309
A remote volcanic field in the rugged headwaters of the Río Puelche and Río Invernada (35.8°S) constitutes the largest cluster of Quaternary rhyolite lava flows yet identified in the Andean Southern Volcanic Zone. The Puelche Volcanic Field belongs to an...
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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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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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