The study reports textures and compositions of uraninite and brannerite from the Mohuldih uranium deposit of the Singhbhum Shear Zone. Three types of texturally varied uraninite are identified: (i) pre-tectonic (UG-1), (ii) syn to post-tectonic (UG-2), and (iii) inclusions (UG-3). Based on UO2 and PbO composition, these are further divided into five subgroups (UG-1a, UG-2a, UG-1b, UG-2b, and UG-3). The negative correlation between the rare-earth elements including Y (Sigma REE2O3 + Y2O3) and UO2 of UG-1a and UG-2a uraninite indicates substitution of REE and Y for U4+ in the structure of these grains during primary crystallization, whereas UG-1b and UG-2b resulted from REE + Y + U-enrichment during secondary fluid-induced alteration. Compositional trends further reveal post-crystallization incorporation of Na, Si, K, Ca, Ti, and Fe, replacing radiogenic Pb in the structure of uraninite. The U-Th-Pb-Total dating of uraninite yields two clusters: older (similar to 1.71-1.64 Ga; preserved by UG-1a and UG-2a) and younger (similar to 0.93 Ga; UG-1b and UG-2b). Additionally, the extrapolated best-fit linear trend for uraninite in UG-3 population preserves chemical dates ranging from similar to 1.71 to similar to 1.64 Ga. The similar to 1.64 Ga represents a U + Y + HREE + Ca + Fe hydrothermal event, resulting in the precipitation of uraninite, followed by dissolution-reprecipitation of the mineral along the grain boundary and fractures at similar to 0.93 Ga. The oldest mesured date (similar to 1.71 Ga) is attributed to partial Pb-loss by older uraninite during the similar to 1.64 Ga hydrothermal event, with no evident geological significance in the area. The dissolution-reprecipitation of the early-formed uraninite also resulted in the formation of brannerite and ilmenite during the similar to 0.93 Ga event.
