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Mostrando ítems 31-40 de 479
Volcanological aspects of the northwest region of Parana continental flood basalts (Brazil)
(Copernicus Gesellschaft Mbh, 2015)
Cenozoic diatreme field in Chubut (Argentina) as an evidence of phreatomagmatic volcanism accompanied with extensive Patagonian plateau basalt volcanism?
(Int Union Geological Sciences, 2007-09)
In Patagonia, Argentina, at the northern border of the Patagonian mafic Cenozoic plateau lava fields newly discovered diatremes stand about 100 m above the surrounding plane. These diatremes document phreatomagmatic episodes ...
Geochemistry and Sr, Nd, Pb isotopic composition of the Central Atlantic Magmatic Province (CAMP) in Guyana and Guinea
(ELSEVIER SCIENCE BV, 2005-06)
The Central Atlantic Magmatic Province (CAMP) is one of the largest igneous provinces on Earth, extending more than 5000 km north to south, on both sides of the Atlantic Ocean. Its emplacement occurred about 200 Ma ago, ...
Time-evolution of magma sources in a continental back-arc setting: The Cenozoic basalts from Sierra de San Bernardo (Patagonia, Chubut, Argentina)
(Cambridge University Press, 2008-12)
East of the Patagonian Andes, mafic volcanic rocks (mainly lava flows and scoriae) are exposed in the Sierra de San Bernardo fold belt and neighbouring areas (central Patagonia; 44.5-46° S, 69-71° W). They were erupted ...
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 THE LATE PROTEROZOIC CURACA MAFIC DYKE SWARM, BRAZIL - ASTHENOSPHERIC MAGMATISM ASSOCIATED WITH CONTINENTAL COLLISION
(Springer-verlag WienViennaAustria, 1995)
Spinel-facies mantle xenoliths from Cerro Redondo, Argentine Patagonia: Petrographic, geochemical, and isotopic evidence of interaction between xenoliths and host basalt
(ELSEVIER SCIENCE BV, 2005-06)
Cerro Redondo is an ancient cinder cone now almost completely eroded, sited over a sill that corresponds to a sub-volcanic magma chamber, in Santa Cruz province, Patagonia, Argentina. It is composed of Pliocene-Pleistocene ...