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Rhyolite lava dome growth styles at Chaitén Volcano, Chile (2008-2009): Interpretation of thermal imagery
(2013-05)
Airborne thermal images of the Chaitén rhyolite lava dome were obtained on three occasions between January 2009 and January 2010. These images were useful for understanding the nature and pace of growth of the newly extruded ...
Topaz magmatic crystallization in rhyolites of the Central Andes (Chivinar volcanic complex, NW Argentina): Constraints from texture, mineralogy and rock chemistry
(Elsevier Science, 2013-10)
Topaz-bearing rhyolite lavas were erupted as domes and cryptodomes during the early history of the Late Miocene Chivinar volcano, in Central Andes. These are the only topaz rhyolite lavas recognized in Central Andes. ...
Distinguishing lavas from intrusions in an Early Paleozoic submarine backarc sequence, Puna, Argentina
(Elsevier Science, 2020-11)
In ancient volcano-sedimentary successions, the reconstruction of the facies architecture may be difficult because of incomplete exposure, deformation, metamorphism and hydrothermal alteration. The distinction of lavas or ...
Diversity of volcanism and evidence of discrete eruption centres in the Miocene Andes of Central Chile
(2023)
The geology of the Farellones region in the Andean Cordillera of central Chile, comprise a thick sequence of volcanic and volcaniclastic Miocene rocks. The occurrence of discrete eruption centres within this sequence, ...
Highly differentiated "Topaz" rhyolite in the high plateau province of southern Peru
(Sociedad Geológica del PerúPE, 2002)
High-silica rhyolite is present in various parts of southern Perú. Rhyolite from two localites, the Cailloma caldera and the newly recognized Río Chalhuanca dome field, both in Arequipa Department, belong to the group of ...
The Marifil Volcanic Complex at Sierra de Pailemán: implications for the Early Jurassic magmatic evolution of the Eastern North Patagonian Region
(Taylor & Francis, 2021-03-02)
The Sinemurian Marifil Volcanic Complex at Sierra de Pailemán, located in the east part of the North Patagonian Region, Argentina, includes five lithofacies and three volcanic events. The volcanic activity begins with ...
Genesis of megaspherulites in El Viejo Rhyolitic Coulee (Pleistocene), Southern Puna, Argentina
(Springer, 2020-05-14)
Crystalline domains in rhyolitic domes and coulees are commonly characterized by spherulites and lithophysae. Spherulites typically range from microscopic to a few centimeters in diameter. Larger spherulites, termed ...
El centro volcánico Sierra Grande: caracterización petrográfica y geoquímica del magmatismo extensional liásico, noreste de la PatagoniaSierra Grande volcanic center: petrographical and geochemical characterization of the extensional liasic magmatism, northeastern Patagonia
(Asociación Geológica Argentina, 2011-12)
El trabajo expone los datos, interpretaciones y conclusiones, obtenidos del mapeo litofacial de un área de aproximadamente 400 km2 del Complejo Marifil en la localidad de Sierra Grande sector noreste del macizo de Somún ...
Petrogénesis de los thundereggs en domos riolíticos del centro del Chubut, PatagoniaPetrogenesis of thundereggs in Eocene rhyolite domes of central Chubut, Patagonia
(Asociación Geológica Argentina, 2006-09)
Se describen los thundereggs que se encuentran en domos vitrofíricos de la caldera de Piedra Parada. Tanto las características geológicas, petrológicas como geoquímicas sugieren que estos crecen a partir de gotas de líquidos ...