Question

on the outline map of India
mark the following
D kolar gold mine
a) Nilgini mountains
3) Malwe Plateau
4) River tapti
5) River Brahmaputra
6) Deccan Plateaued​

Answer 1

The eastern Dharwar Craton of southern India includes at least three schist belts. One of them is the Kolar Shist Belt. They are 2.7Ga old, and have been alterated by mesothermal, quartz-carbonate vein gold mineralization. The host rocks are amphibolites and the ore veins are flanked by only a thin zone of biotitic alteration.

Kolar Shist Belt is the southernmost belt, trending north-south. It consists predominantly of tholeiitic amphibolites, in minor amounts komatiitic amphibolites (BIF), graphitic schists and felsic schists (Champion Gneiss). The gold-quartz vein mineralization is most intense in the central zone, along a tectonic contact zone between two suites of metavolcanics. The Kolar schist belt is a late Archean suture (~2.5Ga).