The Trivandrum Granulite Block (TGB), southern India records evidence for three distinct stages of metamorphic evolution (Ml,M2, M3) during the Pan-African orogeny, with possible temperature gradient from south to north of the terrain as inferred from mineral phase equilibria thermobarometry in a number of classic localities (Nuliyam, Kunnanpara, Pandicherry and Nellikkala). Fluid inclusions (EI.) are mostly represented by C0,-rich varieties, in some cases with trace admixture of other gases. Brine inclusions are markedly rare. Several generations of carbonic inclusions occur in the charnockites and host rocks (Bt-Grt gneisses), mostly (with rare exception) homogenizing into the liquid phase, but yielding different homogenization temperatures (Th) which translate into variable density (p) ranges. The most common arrays of C0,-rich inclusions have Th values within the interval of +2 to + 17.5”C (p = 0.9160.79 g/cm3) and of +18.5 to f28.3”C (p = 0.790 0.649 g/cm3). A denser variety of CO, inclusions with Th within the range of -12.4 to -0.5”C (p = 0.996 0.931g/cm3) also occur. These Th values and corresponding densities are generally comparable with those reported in previous fluid inclusion studies from this region. We also report here the discovery of “superdense” C0,-rich inclusions in a charnockite sample from Nuliyam with Th in the range of -15.6 to -21.9”C (p = 1.012 1.041 g/cm3). This is by far the first report of such “superdense” inclusions from this granulite block. A sketch of one of the arrays of these inclusions in Nuliyam charnockite is shown in figure 1. Although this array represents a “group of synchronous inclusions” the homogenization temperatures are not uniform, and range from -15.6 to -1.8”C, and even +@C. Such variations in Th representing density reversals within EI. during exhumation of rocks are not uncommon. These groups of inclusions fill healed cracks in quartz, often transecting grain boundaries and apparently showing a primary-secondary (pseudosecondary) or even late (secondary) character. The charnockites of the region formed during the decompression at the first metamorphic stage (Ml) at temperatures (730k 35°C) higher than for their host rocks (697k 40°C), and at appreciably lower pressures (3.56 and 5.36 kbar, respectively). From textural relations, the groups of synchronous C0,-rich inclusions having Th,,, = 8.1 13.6”C (p = 0.8760.834 g/cm3) and probably also those with Th,,,= 2.1 4.9T (p = 0.9150.897 g/cm3) can be considered trapped at P-T conditions of charnockite formation (former group) and during M1 metamorphism of the host rocks (latter group).