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Samanta Serra-Varela,Pablo D. González,Raúl E. Giacosa,Nemesio Heredia,David Pedreira,Fidel Martín-González,Ana María Sato
Pág. 102 - 130
In San Martín de los Andes area (Argentinian Patagonia) the Palaeozoic basement consists of metamorphic and plutonic rocks. The metamorphic rocks include strongly deformed schists, gneisses and migmatites. Their geochemical and petrographic characteristi...
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Carlos Dino Ramacciotti,César Casquet,Edgardo Gaspar Baldo,Sebastián Osvaldo Verdecchia,Matías Martín Morales,Priscila Soledad Zandomeni
Pág. 526 - 555
The Sierra de Pie de Palo (SPP, Western Sierras Pampeanas) shows evidence of two regional metamorphisms: one Mesoproterozoic attributed to the Grenvillian orogeny and other of Ordovician age related to the Famatinian orogeny. The Neoproterozoic-to-Cambri...
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Carlos Alberto García-Ramírez, Vanessa Rey León, Víctor Alejandro Valencia
Pág. 307 - 327
La Unidad Ortoneis presente en el Macizo de Santander, ubicado en los Andes del Norte de Colombia, está
compuesta principalmente de ortoneises cuarzo-feldespáticos, pelíticos y en menor proporción ortoneises de composición
máfica y anfibolitas. Estudios...
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Victor Maksaev,Javier Arancibia,Francisco Munizaga,Colombo Tassinari
Pág. 285 - 312
U-Pb detrital-zircon geochronology of two discrete outcrops of mica schists of the western border of the Domeyko Cordillera in the Region of Atacama, northern Chile, indicates that the maximum age of sedimentation of their protolith corresponds to the La...
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Juan A. Murra,Edgardo G. Baldo
Pág. 277 - 298
An important magmatic and tectonometamorphic activity of Early and Middle Ordovician age is registered in the pre-Andean basement of the Sierras Pampeanas of Argentina. These were linked to the development of a continental magmatic arc during the Famatin...
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Ricardo Varela,Miguel A.S. Basei,Carlos A. Cingolani,Oswaldo Siga Jr.,Claudia R. Passarelli
Isotopic data are presented for rocks of the Andean crystalline basement at 40°S, in Neuquén and Río Negro provinces. The methods used were U-Pb in zircon (crystallization ages of plutonic rocks), K-Ar in micas and U-Pb in titanite (metamorphism and cool...
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