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Alejandro Sánchez Valenzuela,Michel de Saint-Blanquat,Francisco Hervé,Mireille Polvé,Diego Morata,Phillipe de Parseval,Mathieu Benoit
Pág. 359 - 402
In this work, we present the results of a petrographic and geochemical study that involves seven Cenozoic plutons located in a NS trending belt in western Patagonia, south of the present Chile Triple-Junction and to the east of the present magmatic arc. ...
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César Arriagada,Rodolfo Ferrando,Loreto Córdova,Diego Morata,Pierrick Roperch
Pág. 419 - 437
In this paper we show the results of a paleomagnetic study carried out along the western Andes of central Chile from 30° to 36°S. Whereas paleomagnetic analysis from Jurassic to Late Cretaceous rocks in the Pampean flat slab segment shows small or non si...
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Christian Creixell,Miguel angel Parada,Diego Morata,Paulina Vasquez,Carlos Perez de Arce,Cesar Arriagada
Pág. 37 - 63
The Middle-Late Jurassic mafic dike swarms of central Chile between 33º and 33º45'S register the tectonic activity of the contemporaneous arc represented by the Coastal batholith. These dike swarms evidence alternate episodes of transtension and transpre...
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Felipe Espinoza,Diego Morata,Mireille Polve,Yves Lagabrielle,Rene Maury,Aude de la Rupelle,Christele Guivel,Joseph Cotten,Herve Bellon,Manuel Suarez
Pág. 300 - 328
We presenta chronological (K-Ar), petrologic and geochemical study (major and trace elements, SrNd isotopes) ofMiddle Miocene (ca. 16-14 Ma) calc-alkaline rocks (basalts to andesites) extruded in the present-day back-arc region ofCentral Patagonia (Zebal...
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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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Mauricio Belmar,Diego Morata
Triassic-Jurassic volcano-sedimentary sequences in the Coastal Range of central Chile (34° 45/35°20'S) from the Vichuquén-Tilicura and Hualañé-Gualleco basins display metamorphic assemblages indicative of very low-grade conditions. Triassic and Lower Jur...
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Diego Morata,Luis Aguirre,Marcela Oyarzun,Mario Vergara
Pág. 83 - 98
Triassic volcanism in the Coastal Range of central Chile is represented by the Pichidangui Formation (31°54' to 32°15'S) composed of acid and basic lava flows and sub-volcanic intrusives with some sedimentary intercalations. Both rock types have been aff...
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Mario Vergara,Diego Morata,Rosemary Hickey-Vargas,Leopoldo Lopez-Escobar,Ingrid Beccar
Pág. 23 - 41
Upper Eocene to Middle Miocene volcanic rocks are found in the Colbún area, Linares Precordillera, central Chile (35º35'-36ºS). Based on stratigraphic characteristics, K-Ar and Ar-Ar dating, two different units are recognized: 1-a Lower Unit (Upper Eocen...
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Luis Aguirre,Joaquin A. Cortes,Diego Morata,Francisco Herve
Pág. 187 - 201
ABSTRACT. Rocks belonging to various units from the Jurassic to the Neogene were studied in the Chilean Patagonian area between 43 and 46°S. AII these rocks were affected by very low to low grade metamorphism in the zeolite, prehnitepumpellyite and green...
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