Detailed petrology, geochemistry, phase equilibrium modelling and geochronology of metapelites and mafic granulites from Madurai and Nagercoil blocks of South India were carried out to understand their petrogenesis and tectonic setting. The results demonstrate that mafic granulites from Nagercoil block had formed by the partial melting of a subduction- modified enriched mantle source that got emplaced during the late Neoproterozoic with magma generation from a reworked melting sources involving Proterozoic components. Metapelites from Madurai block record high to ultrahigh-temperature metamorphic conditions along a clockwise Paleoproterozoic record and a late Neoproterozoic high-grade metamorphic record. The results from these litho-units are interpreted as the signatures of collisional orogeny prevalent in the region during the final stages of the Gondwana assembly.

Bibliographic Info: Amal Dev, J., Tomson, J. K., Vijaya Kumar, T., Nilanjana Sorcar (2023). Age and petrogenesis of mafic granulites from central Madurai block, south India: implications on regional tectonics. Geological Magazine, Vol. 160 (5), pp. 955-971. https://doi.org/10.1017/S0016756823000079.

Amal Dev, J., Nilanjana Sorcar., Sneha Mukherjee., Tomson, J. K. (2022). Phase equilibrium modelling and zircon-monazite geochronology of HT-UHT granulites from Kambam ultrahigh-temperature belt, south India. International Geology Review, 1-19
https://doi.org/10.1080/00206814.2022.2091671.

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