Low-grade metamorphism of Mesozoic and Cenozoic volcanic sequences of Patagonia, Chile (43-46°S)

Luis Aguirre, Joaquín A. Cortés, Diego Morata, Francisco Hervé

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7 Citations (Scopus)

Abstract

Rocks belonging to various units from the Jurassic to the Neogene were studied in the Chilean Patagonian area between 43 and 46°S. All these rocks were affected by very low to low grade metamorphism in the zeolite, prehnite-pumpellyite and greenschist facies. Differences in grade are related to the age of the rock sequences with the youngest (Tertiary) metamorphosed in zeolite and the oldest (Jurassic) in greenschist facies. Temperatures for the metamorphic processes are in the range 120° to 340°C with P below 2kb. A thermal imprint of Cretaceous granitoids on the Jurassic rocks exists almost completely obliterating an earlier low-grade regional metamorphic pattern.

Original languageEnglish
Pages (from-to)187-201
Number of pages15
JournalRevista Geologica de Chile
Volume24
Issue number2
Publication statusPublished - Dec 1997

ASJC Scopus subject areas

  • Geology

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