info:eu-repo/semantics/article
ALTERAÇÃO HIDROTERMAL DO PIROXENITO DE PARAMIRIM, BAHIA
ALTERAÇÃO HIDROTERMAL DO PIROXENITO DE PARAMIRIM, BAHIA
Autor
OLIVEIRA, MARIA ALBA FARIAS TANNER DE
SAMPAIO FILHO, HELI DE ALMEIDA
OLIVEIRA, TEODORO TANNER DE
Institución
Resumen
The pyroxenite that occurs near Paramirim, State of Bahia, is altered to talc marble. Microscopic, X-ray and quantitative chemical analysis have shown hydrothermal alteration followed by metamorphism. The Ca, Mg, Al bearing-solutions were rich in H2O and CO2 being the reactions controlled by PH20 and PCO2. In the pyroxenite and tremolite-talc schist, PH2O > PC02 and in the talc PCO2 > PH20. The pyroxenite that occurs near Paramirim, State of Bahia, is altered to talc marble. Microscopic, X-ray and quantitative chemical analysis have shown hydrothermal alteration followed by metamorphism. The Ca, Mg, Al bearing-solutions were rich in H2O and CO2 being the reactions controlled by PH20 and PCO2. In the pyroxenite and tremolite-talc schist, PH2O > PC02 and in the talc PCO2 > PH20.