Calc-alkaline and alkaline miocene and calc-alkaline recent volcanism in the Southernmost Patagonian Cordillera, Chile

A. Puig, M. Herve, M. Suarez, A. D. Saunders

Resultado de la investigación: Contribución a una revistaArtículo

32 Citas (Scopus)

Resumen

In the southernmost Patagonian Cordillera (south of Lat. 54°45′) previously unrecorded calc-alkaline dacites and andesites, and adjacent alkali-basalts, were dated at 21 and 18 Ma (K-Ar), respectively. In the same area post-glacial low-K calc-alkaline andesites, identified at Isla Cook, represent the southernmost Recent volcanism recorded so far in South America, about 400 km south of Monte Burney, previously known as the southernmost Recent volcano. The association of contemporaneous calc-alkaline and alkali volcanics suggests a subduction-related environment for the Miocene volcanism, and the Recent calc-alkaline volcanics indicate that currently there is a small component of subduction of the Antarctic Plate beneath the South American part of the Scotia Plate.

Idioma originalInglés
Páginas (desde-hasta)149-163
Número de páginas15
PublicaciónJournal of Volcanology and Geothermal Research
Volumen21
N.º1-2
DOI
EstadoPublicada - 1984

Áreas temáticas de ASJC Scopus

  • Geofísica
  • Geoquímica y petrología

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