Minerals in Meghalaya
Meghalaya is endowed with sizeable deposits of a number of valuable minerals. Coal, limestone, uranium, granite, kaolin, clay and glass sand are the principal minerals. A brief account of mineral resources is as follows:
Limestone
An extensive bed of limestone occurs in the Southern part of the State from Jaintia Hills in the East and Garo Hills in the West. The main deposits are found around Cherrapunjee, Mawlong, Ichamati, Shella, Komorrah in the East Khasi Hills district; Borsora and Bagli in the West Khasi Hills district; Lakadong, Lumshnong and Nongkhlieh in the Jaintia Hills district; and Darrang Era-aning, Siju, Chokpot in the South Garo Hills district.
Coal
Most of the coal reserves in Meghalaya are tertiary reserves.Coal occurs in Mikir Hills, Khasi Hills, Jaintia Hills and Garo Hills districts. The production of upgraded coal was reported by private non-captive mines in the unorganised sector located in these areas except Mikir Hills district. The mines are operated mostly by the local tribals in their private lands.
Uranium reserves in Meghalaya
Meghalaya is the third uranium rich state in the country after Jharkhand and Andhra Pradesh. The state accounts for 16 per cent of Indias uranium reserves, with deposits estimated to be around 9,500 tones and 4,000 tones respectively at Domiasiat and Wakhyn, both in West Khasi hills region.
Kyelleng-Pyndengsohiong, Mawthabah (KPM) uranium mining project is located in the West Khasi Hills district of Meghalaya state in the North East region of India. Formerly this project was also known as Domiasiat uranium mining project. The Atomic Mineral Directorate for Exploration and Research in 1972 found evidences of uranium deposits in the area which was confirmed by 1996 after intensive drilling between 1992 and 1996. Uranium Corporation of India Limited (UCIL) proposes to mine it using open pit mining method up to a depth of 45 m. The processing plant will be constructed at Mawthabah. It is estimated that KPM deposit in Meghalaya will last for 25 years.
Clay
Clay of various types such as Kaolin (China clay), white clay, and fire clay are found in various parts of the states. These clay are suitable for the ceramic, paper, rubber and refractory industries. It has been estimated that there are a few hundred million tonnes of clay reserved in the state.
Granite reserves
Deposits of multi-coloured granite have been located around nongpoh in the Ri-Bhoi district, mylliem in the east khasi hills district; mawkyrwat and nongstoin in the west khasi hills distric.
Sand deposits
The sand deposits of the State are mainly concentrated in Khasi hills. The glass deposits of Laitryn grew coal field and around Shillong are found to be suitable for manufacturing of ordinary bottle glasrs, window glass etc. and with some chemical pu rification even for sheet glass and flint glass. Some of the sands are within the specifica tion o f foundry sands, which are now in great demand in the country. The estimated reserve of glass deposits is about 2.30 m illion tonnes as against Tripura – 0.18 m illion tones.
Feldspar and quartz occur near Tura in Garo hills and near Hahim in Khasi Hills. The estimated mining reserve of feldspar in the State (0.02 million tonnes) is at par with Assam (0.02 million tonne),2 3456 while the quartz is 2.03 m illion tonnes as compared to Tripura – 0.19 million tonnes.
Massive sillimanite associated with corrundum occurs in Khasi hills . More than 2i deposits have been located in the vicinity of Sonapahar, Nongpur and Nongbain villages and are worked by the Assam Sillimanite Ltd. Most of the deposits contain sillimanite with admixed corrundum to a little extent, one or two entirely of corrundum and several of sillimanite only.