Tripartite agreement signed among MECL, RSMML and DMG for solution mining potash in Rajasthan SECTIONS Last Updated: Jan 22, 2021, 03:22 PM IST Share Synopsis Rajasthan has huge potash and halite resources spread across 50,000 sq kms in the Nagaur - Ganganagar basin in the northwest. Reuters GSI (Geological Survey of India) and MECL have established 2476.58 million tonnes and 21,199.38 million tonnes of potash and halite, respectively. New Delhi: The Centre on Friday said a tripartite pact was signed among Mineral Exploration Corporation Ltd (MECL), Rajasthan State Mines & Minerals Ltd (RSMML) and the Department of Mines and Geology (DMG) of Rajasthan for taking up feasibility studies of solution mining of potash in the state.