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Qian Liu, Limei Tang, Ling Chen and Peng Gao
Seamounts are features generated by hot spots and associated intraplate volcanic activity. The geochemical characteristics of igneous rocks constituting seamounts provide evidence of important details of dynamic processes in the Earth, such as mantle mag...
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Reinhard Werner, Boris Baranov, Kaj Hoernle, Paul van den Bogaard, Folkmar Hauff and Igor Tararin
Here we present the first radiometric age and geochemical (major and trace element and isotope) data for samples from the Hydrographer Ridge, a back arc volcano of the Kurile Island Arc, and a newly discovered chain of volcanoes (?Sonne Volcanoes?) on th...
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Ana-Voica Bojar, Victor Barbu, Artur Wojtowicz, Hans-Peter Bojar, Stanislaw Halas and Octavian G. Duliu
New geochronological investigations for the Slanic Formation, correlated with previous bio- and lithostratigaphical information, allow for a better succession of events for the Middle Miocene, including the absolute age of the Badenian salinity crisis in...
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Kenneth L. Finger,Alfonso Encinas,Sven N. Nielsen
Pág. 571 - 579
The Navidad Formation has been the reference unit for the marine Neogene of Chile and the debate about its age and depositional paleoenvironment has a long history. In their recent contribution, Gutiérrez et al. present an interpretation of the Navidad F...
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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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Paul Duhart,Alberto C. Adriasola
The Coastal Ranges in the western part of the Chiloé Archipelago represent an emerged forearc high at the subduction front of south-central Chile. Prior to the Cenozoic framework of the subducting Farallón and Nazca plates beneath the South American plat...
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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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Geoffrey May,Adrian J. Hartley,Guillermo Chong,Fin Stuart,Peter Turner,Stephanie J. Kape
Pág. 33 - 58
New 40Ar/39Ar radiometric, sedimentological and structural data from post-Paleocene sedimentary strata in the Calama Basin, northern Chile suggest that the established lithostratigraphy of the basin-fill requires revision. A new lithostratigraphic scheme...
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Nicolas Saric,Carlos Kreft,Carlos Huete
Pág. 317 - 332
Lo Aguirre is a medium-sized stratabound ore deposit, similar to El Soldado, Mantos Blancos and Michilla, that are still controversial in their origin, in spite of being important Chilean copper producers. The deposit is emplaced at the base of the Veta ...
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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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