Which plateau region of India is often called the mineral heartland of the country?

The Chotanagpur Plateau in Jharkhand and neighbouring states has large deposits of coal, iron ore, mica and bauxite, with the Damodar valley as the major coalfield. The Malwa Plateau is a volcanic upland, Meghalaya has coal and limestone, and the Maharashtra Deccan is covered with basalt and black soil.