Buscar
Mostrando ítems 1-10 de 368
Thermal divide andesites - trachytes, petrologic evidence, and implications from Jurassic north Patagonian massif alkaline volcanism
(Pergamon-Elsevier Science Ltd, 2003-12)
The Andesitas Alvar Formation is part of the large Jurassic volcanic province of Patagonia (southern South America) that, in Jurassic time, participated in the disassembling of Gondwana in a tensional-transtensional regime ...
Mingling and mixing features in basaltic Andesites of the Eastern Cordillera (Central Andes, 24°s): a petrographic and microanalytical study
(Bardi Editore, 2006-12)
The basaltic andesites of the Diego de Almagro volcanic complex (Central Andes, 24°S, 66°W) were erupted during Late Miocene at 300 km from the active arc, in the Eastern Cordillera, at the easternmost end of an important ...
Petrogenesis of Miocene volcanic arc rocks over the Chilean-Pampean flat-slab segment of the Central Andes constrained by mineral chemistry
(Universidad de Barcelona, 2014-06)
Miocene arc volcanism is manifested widely in the Valle del Cura-El Indio belt region (29°30´–30° South latitude), in the southern Central Andes of Argentina and Chile. The magmas that fed this volcanism are well represented ...
Late Cenozoic to modern-day volcanism in the Northern Andes: A geochronological, petrographical, and geochemical review
(Springer Verlag, 2019-01-01)
The Northern Andean Block is the result of complex tectonic interaction between the Farallon-Nazca, South American, and Caribbean Plates. Abundant late Cenozoic volcanism (and associated hypabyssal porphyritic plutonism), ...
Gamma-ray spectrometry signature of paraná volcanic rocks: Preliminary results
(2014-01-01)
The Paraná volcanic rocks (Serra Geral Formation) are characterized by four different types of rocks. The basalts are the most common, and display an integranular texture and dark gray to black color, in massive outcrops. ...
Geochemical signature and reservoir conditions of Early Jurassic calc-alkaline volcanic rocks from Lonco Trapial Formation, Central Patagonia
(Pergamon-Elsevier Science Ltd, 2018-12)
Central Patagonia is traversed by a belt of Early to Middle Jurassic calc-alkaline intermediate volcanic rocks interspersed with more felsic volcanic rocks which are associated with the widespread magmatism that took place ...