---

Raichur schist belt, eastern Dharwar Craton, India: A geochemical analogue of western Aleutian arc.

Khanna TC, Sarma DS.

LITHOS

https://doi.org/10.1016/j.lithos.2025.108263 

The MORB-like depleted rare earth element patterns (LaN/YbN ≤ 1) and arc-like incompatible trace element enrichments relative to high field strength elements i.e. Ba/ Nb > 25 in the 2.7 Ga Raichur metabasalts are consistent with their genesis in a setting similar to the Western Aleutian arc. Apparently, the geochemical process of arc magma genesis recorded in the Neoarchean greenstone belts of the Dharwar Craton resembles Phanerozoic-style magmatism in the Cenozoic intraoceanic arcs. The mechanism of continental crust formation has neither changed significantly over time nor across the Earth.

Fig: The average composition of the basalts from the Neoarchean greenstone belts of the Dharwar Craton, India are comparable to those from the Cenozoic intraoceanic arcs elsewhere on the Earth.

---