Uranium mineralization in the Lower Mahadek Sandstones of Laitduh Area, East Khasi Hills District, Meghalaya

Significant uranium mineralization hosted in feldspathic sandstone of Upper Cretaceous Lower Mahadek Formation has been located at Laitduh, East Khasi Hills district, Meghalaya. Two mineralized horizons have been identified within Lower Mahadek Formation with vertical separation of 30 m. Samples from upper horizon have assayed upto 0.17% U₃O₈, whereas samples from lower mineralized horizon have assayed upto 0.50% U₃O₈. The radioactive minerals identified are coffinite and pitchblende occurring in association with carbonaceous matter. (author)