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Recent geochronologic data allow us to propose a new characterization of Precambrian granulite-terranes in Peninsular India. The Archean granulite terranes, including the Godavari Granulite Belt (GGB) along the Godavari Valley and the Nilgiri-Madras Granulite Belt (NMGB) along the southern fringe of the Dharwar Craton and north of the Palghat-Cauvery Shear Zone, are characterized by metamorphic events...
Granulite facies metapelites at Koliacode in the Kerala Khondalite Belt show compositional bands of cordierite, spinel, sillimanite and biotite alternating with quartz-feldspar rich bands. Reaction textures involving cordierite and garnet show evidence for decompression. Mineral phase equilibria computations provide temperatures of ca. 700-750C and pressures of 4.5-5.0 kbar. Spinel in these rocks...
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