Phase equilibria modelling coupled with U–Pb zircon and monazite ages of get–cordierite gneiss from Valli-kodu Kottayam in the Kerala Khondalite Belt, south India are presented here. The results suggest that the area attained peak P–T conditions of～900 °C at 7.5–8 kbar, followed by decompression to 3.5–5 kbar and cooling to 450–480 °C, preserving signatures of the partial melting event in the field of high to ultra-high temperature metamorphism. Melt reintegration models suggest that up to 35％granitic melt could have been produced during metamorphism at～950 °C. The U–Pb age data from zircons (～1.0–～0.7 Ga) and chemical ages from monazites (～540 Ma and ～941 Ma) reflect a complex tectonometamorphic evolution of the terrain. The ～941 Ma age reported from these monazites indicate a Tonian ultra-high temperature event, linked to juvenile magmatism/deformation episodes reported from the South Granulite Terrane and associated fragments in Rodinia, which were subsequently overprinted by the Cambrian (～540 Ma) tectonothermal episode.