Basic magmas in the early evolution of the Southernmost Patagonian Batholith, Chile

M. Suárez, M. Hervé, A. Puig

Resultado de la investigación: Contribución a una revistaArtículo

4 Citas (Scopus)

Resumen

Basic magmas played an important role in the early evolution of a segment of the Patagonian Batholith (141 to 34 m.y.) exposed south of Tierra del Fuego, Chile. The basic magmatism lasted 40 m.y. to possibly 60 m.y. (141 to 84 m.y.). It is represented by early gabbros and hornblendites (141 to 103 m.y.) and by synplutonic dikes and some of the numerous basic inclusions in the granitoids of a Cretaceous (113 to 84 m.y.) plutonic group. Some of the inclusions are interpreted as the disrupted portions of synplutonic dikes. Available data indicate that basaltic to rhyolitic volcanism which took place in the area during the Early Cretaceous was contemporaneous with the basic magmatism reported here and during its latest stage, with granitoid magmas. Therefore, gabbros apparently formed part of the roots of the island arc during the early stages of its evolution, whilst granitoids may have had a greater participation at a later stage in the root system.

Idioma originalInglés
Páginas (desde-hasta)337-342
Número de páginas6
PublicaciónGeologische Rundschau
Volumen74
N.º2
DOI
EstadoPublicada - jun 1985

Áreas temáticas de ASJC Scopus

  • Ciencias ambientales (todo)
  • Ciencias planetarias y de la Tierra (todo)

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