Isotope Geological Studies of Granite‐Type Uranium Deposits in South China

Abstract

Abstract The uranium‐bearing granites in South China can be classified into two types, namely, syntectic type and transformation type. A fairly systematic hydrogen, oxygen, carbon, sulfur isotopic study of uranium deposits related to these two types of granites has been carried out by the authors, and the results show that they have obvious differences in such aspects as ore‐forming and rock‐forming ages, properties of ore‐forming solutions and source of ore‐forming substances. The authors hold that the uranium deposits related to the syntectic type granitoids are intimately connected with magmatism in time and space, whereas the uranium deposits related to the transformation type granites, though spatially linked up with uranium‐bearing granites, should actually owe their formation to extension in the fault block movement in South China.