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

Isabel Pereira Ludka, Cristina Maria Wiedemann

Abstract


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



DOI: https://doi.org/10.11137/1997_0_143-162

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