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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Metamorphic evolution and P-T path of gneisses from Goias Magmatic Arc in southwestern Goias State

Full text
Author(s):
Navarro, Guillermo R. B. [1] ; Zanardo, Antenor [1] ; da Conceicao, Fabiano Tomazini [2]
Total Authors: 3
Affiliation:
[1] Univ Estadual Paulista Julio de Mesquita Filho UN, DPM, Rio Claro, SP - Brazil
[2] Univ Estadual Paulista Julio de Mesquita Filho UN, DEPLAM, Dept Planejamento Terr & Geoproc, Rio Claro, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: BRAZILIAN JOURNAL OF GEOLOGY; v. 43, n. 2, p. 301-315, JUN 2013.
Web of Science Citations: 1
Abstract

In the southwestern Goias State, the rocks of the Goias Magmatic Arc present mineral assemblages typical of the amphibolite facies. Thermobarometric calculations show that P and T conditions for associations involving amphibole + biotite + kyanite + staurolite + garnet + plagioclase + muscovite, biotite + garnet + plagioclase + muscovite, amphibole + biotite + garnet + plagioclase, belong to the middle amphibolite facies in the staurolite-kyanite field, reaching temperatures and pressure higher than 600 degrees C and 7 kbar, respectively. The P-T path is clockwise and the values obtained by thermobarometric calculations are interpreted as a retrometamorphic reequilibrium in the amphibolite facies. (AU)