cent). Assam, Bihar, Goa, Jharkhand, Kerala, Maharashtra, Meghalaya and Nagaland together
      account for the remaining 4 per cent resources.
      Lead and Zinc
            The total resources of lead and zinc ores as in 2015 as per UNFC system, are estimated at
      749.46 million tonnes. Of these, 106.12 million tonnes (14 per cent) fall under ‘reserves’ while
      balance 643.34 million tonnes (86 per cent) are classified as ‘remaining resources’. The
      resources of ore containing + 10 per cent Pb and Zn were estimated at 124.33 million tonnes, ore
      containing 5 to 10 per cent Pb and Zn were 329.88 million tonnes and ore containing less than 5
      per cent Pb and Zn were 295.35 million tonnes.
            Rajasthan is endowed with the largest resources of lead-zinc ore amounting to 670.34
      million tonnes (89.44 per cent), followed by Andhra Pradesh 22.69 million tonnes (3.02 per
      cent), Madhya Pradesh 14.84 million tonnes (1.98 per cent), Bihar 11.43 million tonnes (1.52 per
      cent) and Maharashtra 9.27 million tonnes (1.24 per cent). Resources are also established in
      Gujarat, Meghalaya, Odisha, Sikkim, Tamil Nadu, Uttarakhand and West Bengal.
      Manganese Ore
            The total resources of manganese ore in the country as in 2015 are placed at 496 million
      tonnes as per UNFC system. Out of these, 94 million tonnes are categorised as reserves and the
      balance 402 million tonnes are in the remaining resources category. Gradewise, ferro-manganese
      grade accounts for 7 per cent, medium grade 11 per cent, BF grade 28 per cent and the remaining
      54 per cent are of mixed, low, others, unclassified, and not-known grades including 0.17 million
      tonnes of battery/chemical grade.
            Statewise, Odisha tops the total resources with 44 per cent share followed by Karnataka 22
      per cent, Madhya Pradesh 12 per cent, Maharashtra and Goa 7 per cent each, Andhra Pradesh 4
      per cent and Jharkhand 2 per cent. Rajasthan, Gujarat and West Bengal together shared the
      remaining about 2 per cent resources.
            Important occurrence is nickeliferous limonite in the overburden of chromite in Sukinda
      Valley, Jajpur district, Odisha, where it occurs as oxide. A suitable process is being developed
      for its utilisation. Nickel also occurs in sulphide form along with copper mineralisation in East
      Singhbhum district, Jharkhand. In addition, it is found associated with uranium deposits at
      Jaduguda, Jharkhand and process is being developed for its recovery. Other reported occurrences
      of nickel are from Karnataka, Kerala and Rajasthan. Polymetallic sea nodules are another source
      of nickel. As per UNFC, as in 2015, the total resources of nickel ore have been estimated at 189
      million tonnes. About 92 per cent resources; i.e., 175 million tonnes are in Odisha. The
      remaining 8 per cent resources are distributed in Jharkhand (9 million tonnes) and Nagaland (5
      million tonnes). Nominal resources are reported from Karnataka (0.23 million tonnes).
            The total resources of tungsten ore in the country, as per UNFC system, as in 2015 have
      been estimated at 87.4 million tonnes containing 142,094 tonnes WO3 content. All these
      resources are placed under ‘remaining resources’ category. Resources are mainly distributed in
      Karnataka (42 per cent), Rajasthan (27 per cent), Andhra Pradesh (17 per cent) and Maharashtra