Ages du metamorphisme granulitique dans le craton du Sao Francisco (Bresil). Implications sur la nature de l'orogene transamazonien

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

P. Ledru, A. Cocherie, J. Barbosa, V. Johan, T. Onstott

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

An Early Proterozoic phase of granulite metamorphism in the Sao Francisco craton (Brazil) has been dated at 2080 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 2645 ± 10 Ma whose age is preserved from the isotopic rehomogenization related to the Transamazonian orogen. There is an abridged English version. -English summary

Translated title of the contributionAges of granulitic metamorphism in the Sao Francisco Craton (Brazil): implications for the type of the Transamazonian orogeny
Original languageFrench
Pages (from-to)251-257
Number of pages7
JournalComptes Rendus - Academie des Sciences, Serie II: Sciences de la Terre et des Planetes
Volume318
Issue number2
StatePublished - Jan 1 1994
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Ocean Engineering

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