Rajeev Bhattacharyya
India’s border region of the Northeast has been identified as an area with “promising” deposits of rare earth elements and critical minerals essential for digital and defense manufacturing, and clean energy transition.After years of research and exploration, the state-owned Geological Survey of India (GSI) has concluded that “the states of Arunachal Pradesh and Assam have emerged as promising zones for graphite, vanadium, REEs, base metals, gold, coal and limestone, while Meghalaya and Nagaland hold extensive resources of limestone, coal, and minor strategic metals.”
The 63-page report by GSI added that the country’s growing demand for such resources underlines “the need to identify and develop domestic sources, particularly in geologically promising regions such as the northeast.”The rare earth elements (REE) are a set of 17 metallic elements grouped into light and heavy categories. They are necessary for the production of more than 200 consumer products, such as cellular telephones, computer hard drives, electric and hybrid vehicles, and televisions. Defense applications include guidance systems, lasers, electronic displays, and radar and sonar systems.
India’s northeastern states, especially the states of Assam, Meghalaya, Nagaland and Arunachal Pradesh, have been known for their hydrocarbon reserves since the colonial era. Rich deposits of uranium have also been discovered in Meghalaya, but extraction of these deposits has been opposed by local organizations.The GSI report identified Lodoso village in Arunachal Pradesh’s Papum Pare district as having 2.15 million tons of REE-bearing ferruginous phyllite, a type of metamorphic rock.
In Assam, the concentrations of REE ranged from 1,000 to 5,000 parts per million, while it was between 3,646 and 5,100 parts in Meghalaya.The GSI’s estimate of REE deposits in the Northeast is part of the total of 482.6 metric tons of various cut-off grades in 34 exploration projects in the country. The Atomic Minerals Directorate for Exploration and Research (AMD) has identified around 7.23 million tons across the states of Andhra Pradesh, Odisha, Tamil Nadu, Kerala, West Bengal, Jharkhand, Gujarat, and Maharashtra.
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