O Gabro coronítico de Amparo, RJ: petrografia, química mineral e geotermometria

Isabel Pereira Ludka, Cristina Maria Wiedemann

Resumo


A gabbroic body of probable Brasiliano age, cropping out in a 4 km2 area around Amparo, in the state of Rio de Janeiro, was studied under the petrographic microscope and the electron microprobe. The dominant mineral assemblage consists of plagioclase (An 89

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