Abstract

granulite facies recrystallization [750–800°C, 7–8 kbar, a(H2O) The Bolangir massif-type anorthosite in the Eastern Ghats Belt of <0·25] during cooling from the igneous to the regional thermal India is composed of homogeneous anorthosite and subordinate regime. volumes of schlieric leuconorite in its marginal parts. The massif is separated from granulite grade country gneisses by coarse-grained garnetiferous granitoids. Extremely iron-rich ferrodiorites (FeO∗ 39–30 wt %, SiO2 36–43 wt %, dO = 7·7–8·0‰) occur

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