Researches on the distribution of U, Th and K in the crust yielded the ion migration law, the ion

metallogenic hypothesis and the five laws for geological survey and appraisal of ore resources. Preliminary

inspection in two study areas of South China has proved their correctness. There exist U, Th, K

characteristic distribution zones in these two areas, and the known important uranium and non-uranium

deposit, the predicted uraniumrich target districts as well as the polymetallic prospect districts all

lie within the characteristic distribution zones. They regionally form resources networks and linearly form

resources ropes. The known important uranium and nonuranium deposits, the predicted uraniumrich target

districts as well as the polymetallic prospect districts are all controlled by structures and contact zones

and occur in old strata. The oreprospecting potential of the airborne gamma energy spectrum technique

lies in the consistency between the airborne gamma energy spectrum anomalies and the formation mechanisms

of important deposits of various ore species. The U, Th, K characteristic distribution zones disclosed

during the airborne gamma energy spectrum survey provide basic facts for the study of ion movement stress

zones.