India,
gifted with a coastline of over 6000 km, hosts some of the largest
and richest shoreline placers. The beach and dune sands in India
contain heavy minerals like ilmenite, rutile, garnet, zircon,
monazite and sillimanite. A combination of favorable factors like
network of drainage, aided by wind and coastal processes like waves
and currents, has influenced the formation of the beach and
adjoining dune sands. Ilmenite-rich major beach and dune sand
deposits occur in the coastal stretches of Kerala (Chavara), Tamil
Nadu (Manavala kurichi, Midalam, Vayakallur), Andhra Pradesh, Orissa
and Maharashtra. The Indian ilmenite commonly contains 50-60% TiO2
and is suitable for various process technologies. Zircon, monazite
and Sillimanite are ubiquitous in both the beach and inland red Teri
sands, and constitute potential co-products. The Indian resources of
placer minerals are: 348 Million tons (Mt) of Ilmenite, 107 Mt of
garnet, 21 Mt of zircon, 18 Mt of monazite and 130 Mt of Sillimanite.
Indian resources constitute about 35% of world resources of Ilmenite,
10% of Rutile, 14% of Zircon and 71.4% of Monazite. India meets about
10% of the world requirement of garnet. This unique status is largely
due to the exploratory efforts of the Atomic Minerals Directorate for
Exploration and Research (AMD) of the Department of Atomic Energy,
Government of India since 1950s.
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