If we study the maps given in the textbook, we can understand why Chota Nagpur plateau is considered as a storehouse of minerals.
The reasons are
(i) Iron ore is found in abundance and about 40% of iron ore in India is found in this area.
(ii) Over 50% of manganese in India is found in this region.
(iii) Almost 60% of copper in India is found here.
(iv) Almost 60% of bauxite in India is found here.
(v) The region is also rich in coal.