ALTERAÇÃO HIDROTERMAL DO PIROXENITO DE PARAMIRIM, BAHIA

MARIA ALBA FARIAS TANNER DE OLIVEIRA, HELI DE ALMEIDA SAMPAIO FILHO, TEODORO TANNER DE OLIVEIRA

Resumo


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.

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