[en] Khetri Sub Basin of North Delhi Fold Belt of Delhi Supergroup is favourable locale for uranium mineralization. Concealed ore grade uranium mineralisation has been located at Jahaz along the 'albitite zone'. Mineralization is hosted by brecciated and sheared quartz biotite schist and quartz amphibole schist of Ajabgarh Group over a strike length of 2.10 km with average thickness of 3.78m. Mineralised zone is confined between 360m to -18m RL. Common alteration features recorded in mineralised rocks are silicification, chloritization and albitisation. The principal ore minerals are uraninite, molybdenite, pyrite, pyrrhotite and chalcopyrite. Geochemical studies indicate average content of U₃0₈ 357 ppm, Mo 274 ppm, V 117 ppm, Cu 584 ppm (n=100) in mineralized rock. Principal component analysis (PCA) has revealed U-Cu-Mo, U-V and Ni-Co association. Uranium mineralisation is structurally controlled, 'metasomatite' type. Age of this mineralisation is 841±26 Ma by Pb-Pb method. (author)