Contrasting Styles of Lower Crustal Metamorphism from a Granulite Suite of Rocks from Angul, Eastern Ghats Belt, India: Implications for the India–Antarctica Correlation.

The article focuses on the metamorphic history and petrological characterization of the Angul domain at the northern margin of the Proterozoic Eastern Ghats Province (EGP) in India. It identifies two distinct granulite-facies metamorphic events: an earlier event (MA1) at ca. 1200 Ma marked by high-temperature (~850°C) and moderate-pressure (~7–8 kbar) conditions, and a younger event (MA2) at ca. 990–960 Ma characterized by lower pressure (~4–6 kbar) and heating along a counter-clockwise pressure–temperature (P–T) path. Monazite and zircon geochronology link MA1 to felsic magmatism and granulite-facies metamorphism, while MA2 corresponds to reworking and associated magmatism, including charnockite and granite intrusions. The study concludes that the Angul domain's metamorphic evolution is distinct from the rest of the EGP, suggesting it was an exotic terrane that amalgamated with the EGP after ca. 960 Ma, and shows strong geological affinity with the Prydz Bay region of East Antarctica.