[en] Uranium bearing veins in partially weathered rock from Ranger no 3 ore body, Northern Territory, Australia, were found to contain saleeite by electron probe microanalysis. The saleeite seems to have been formed by oxidation of the uraninite and subsequent precipitation. The chlorite, mica and quartz adjacent to the saleeite vein appeared to be unaltered which suggests that the solutions causing alteration moved through the vein system. It follows that the sources of magnesium and phosphate for saleeite formation were not local in origin. As the U lost from the vein during alteration of uraninite to saleeite was not deposited in the vicinity of the vein studied, U loss also probably took place through the vein system