Abstract

In the gabbro-anorthosite at Koraput, India, coronites are commonly developed. The garnet coronite found in the northwestern part occurs as a dark band with bluish-gray feldspar laths, pink garnet, and darker mafic minerals (pyroxene, amphibole, and biotite). The mineralogy is described and the petrogenesis discussed. The Koraput coronas are not late magmatic; they probably mark a particular stage in the metamorphic evolution of the gabbros.

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