The chromite deposits in the Archean Nuggihalli schist belt are part of a layered ultramafic–
mafic sequence within the Western Dharwar Craton of the Indian shield. The 3.1-Ga
ultramafic–mafic units occur as sill-like intrusions within the volcano-sedimentary sequences
of the Nuggihalli greenstone belt that are surrounded by the tonalite–trondhjemite–
granodiorite (TTG) suite of rocks. The entire succession is exposed in the Tagdur mining
district. The succession has been divided into the lower and the upper ultramafic units …

The article discusses the compositional variations in the mesoarchean chromites at the
Nuggihalli Schist Belt in western Dharwar Craton in India. It suggests the importance of
chromite as an accessory mineral in ultramafic magmas. Electron microprobe studies of the
chromite grains at the Nuggihalli belt showed intense compositional variability of these
grains in silicate-rich chromatite. It also calculated the parental melt of the chromitites using
primary chromite composition.