The Research group of Dr. Pritam Nasipuri, Department of Earth and Environmental Science, developed a chronological–thermal model of Earth’s evolution at 2500 Ma. Their research presents a petro-chronological study of two-pyroxene mafic rock enclaves within 2500 Ma charnockites in the East Dharwar Craton (EDC). These rocks, with Mg numbers between 42 and 57, formed under high-temperature and pressure conditions (up to ~1050 °C and 30 kilometers). Zoned monazites show age clusters at 2638 Ma, 2539 Ma, and 2458 Ma, while zircons yield an upper intercept age of 2506 ± 13 Ma. The data indicate the presence of Nb-rich, Ti-poor mafic proto-crust around 2600 Ma, which likely triggered Neoarchean ultra-high temperature, > 900OC, (UHT) metamorphism. Monazite crystallization at 2536 Ma is linked to charnockite intrusion during crustal amalgamation, while later monazite growth (<2500 Ma) occurred during isothermal cooling. The earliest tectonism (~2638 Ma) aligns with the assembly of the Neoarchean Kenorland supercontinent. For more details, kindly visit https://doi.org/10.1080/00206814.2025.2499899
