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Diego Morata,Gilbert Feraud,Luis Aguirre,Gloria Arancibia,Mauricio Belmar,Salvador Morales,Javier Carrillo
40Ar/39Ar age data (laser and furnace step heating) on plagioclase from Lower Cretaceous volcanic sequences from the Arqueros Formation in two sections of the Coastal Range at the latitude of La Serena (=29°S) have been obtained. Due to the partial alter...
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Veronica Oliveros,Diego Morata,Luis Aguirre,Gilbert Feraud,Michel Fornari
Pág. 209 - 232
Jurassic to Early Cretaceous magmatism in the Coastal Cordillera of northern Chile is represented by thick sequences of mostly basaltic-andesitic to andesitic lava flows and minor sedimentary rocks. The volcanic sucession was intruded by large plutonio b...
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Marcia Munoz,Francisco Fuentes,Mario Vergara,Luis Aguirre,Jan Olov Nyström,Gilbert Feraud,Alain Demant
Pág. 109 - 140
The stratigraphy, chemistry and age of rocks assigned to the eastern portion of the Abanico Formation exposed along the El Volcán river valley, Principal Cordillera east of Santiago (30º50'S/70º12'-70º5'W), are reported and discussed. This ca. 3,300 m th...
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Francisco Fuentes,Mario Vergara,Luis Aguirre,Gilbert Feraud
Pág. 207 - 225
Eight 40Ar/39Ar ages of rocks from two different areas of the Andes at ca. 33°S, where volcanic units separated by unconformities are exposed, are reported and discussed. These areas are Cuesta de Chacabuco at the northern prolongation of the Central Val...
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Natalie Romeuf,Luis Aguirre,Pierre Soler,Gilbert Feraud,Etienne Jaillard,Gilles Ruffet
Pág. 245 - 259
ABSTRACT. Stratigraphical, petrographical, geochronological and geochemical data available suggest that the various segments of the western margin of South America experienced a different geodynamic evolution throughout the Jurassic_ In the early Jurassi...
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