[en] Palnad Sub-basin, one of the important geological domains for unconformity-related uranium mineralisation, is surrounded by basement granitoids in the northern and western parts. These granitoids exhibit medium to coarse grained, holocrystalline granular nature and hypidiomorphic, inequigranular texture. Major mineral composition is represented by microcline, orthoclase perthite, plagioclase and quartz, whereas minor and accessory minerals include hornblende, chlorite, epidote, apatite, zircon, anatase and sphene. Banganapalle sediment cover over basement granitoid has shown immense potential of fracture-controlled epigenetic type uranium mineralisation (0.13-0.55% U₃O₈) in Koppunuru-Dwarakapuri area, Guntur district, Andhra Pradesh. It is also observed that basement granitoids in these parts have high intrinsic uranium (19 ppm; U/Th ratio 3.80; n = 30) and found to be main source of uranium in the system, which was probably released, remobilised and concentrated at suitable structural locales during the basement reactivation