Ages of granulitic metamorphism in the Sao Francisco Craton (Brazil): implications for the type of the Transamazonian orogeny

Publication Year
1994

Type

Journal Article
Abstract

An Early Proterozoic phase of granulite metamorphism in teh Sao Francisco craton (Brazil) has been dated at 2,080 Ma by the single-zircon dating method using step-wise evaporation. This event is superposed on an earlier Archaean phase of granulite facies metamorphism at 2,645 +- Ma whose age is preserved from the isotopic rehomogenization related to the Transamazonian orogen.

Journal
Tectonics
Volume
318
Issue
2
Pages
251-257