Contrasting geochemistry and metamorphism of pillow basalts in metamorphic complexes from Aysen, S. Chile

F. Hervé, L. Aguirre, V. Sepúlveda, D. Morata

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

18 Citas (Scopus)

Resumen

The geochemistry of pillow basalts from the Chonos Metamorphic Complex (CMC) and the Eastern Andes Metamorphic Complex of Aysen (EAMC) indicates contrasting tectonic environments for these basic lavas. They have E-MORB and continental alkaline affinities, respectively. The MORB-like basalts are metamorphosed in the pumpellyite-actinolite metamorphic facies, with mineral associations indicative of relatively high P/T metamorphism. The continental alkali basalts exhibit pumpellyite-chlorite assemblages developed in a low to intermediate P/T regime. These contrasting eruptive and metamorphic settings agree with recently established age differences between the complexes, and invalidate direct correlation between them.

Idioma originalInglés
Páginas (desde-hasta)379-388
Número de páginas10
PublicaciónJournal of South American Earth Sciences
Volumen12
N.º4
DOI
EstadoPublicada - jul 1999

Áreas temáticas de ASJC Scopus

  • Geología
  • Procesos de la superficie terrestre

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