Artículos de revistas
Stable Isotope Investigations On The Granulite Facies Terrains Of Brazil: A Review
Registro en:
Gondwana Research. , v. 1, n. 3-4, p. 393 - 402, 1998.
1342937X
2-s2.0-2742522241
Autor
Iyer S.S.
Choudhuri A.
Barbosa J.S.F.
Institución
Resumen
Stable isotope data from three areas in the granulite facies terrains of Brazil are assembled and discussed. All the three areas (Jequié, Guaxupé and São José do Rio Pardo) are from the São Francisco Craton. The carbon isotope composition of the fluid inclusion CO2 in the Archean granulite terrain of Jequié indicate the participation of two distinct sources, an upper mantle source and an internal source of Archean organic matter. The isotope data may be interpreted in terms of the granulite genesis due to the intrusion of magma in the lower crust. The singularly uniform carbon isotope data for CO2 fluid inclusion of plutonic granulites is a clear indication of the magmatic addition of CO2-rich volatiles from deeper crustal sources. In the São José do Rio Pardo area sulfur and carbon isotope data of scapolites from the granulites imply the derivation of volatiles from internal sources. 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