Based on the analysis of hydrogeochemical features of Uranium, in terms of the data of dynamic variation of Uranium in some springs in the western Yunnan and Hexi corridor, Gansu, this paper studied the relation between the content variation of Uranium in ground-water and moderately strong earthquakes in these areas.The result shows that the anoma-lous variation of Uranium content is obvious under some circumstances.
By analysing the anomalous mechanism of Uranium content in groundwater and the interference factors, it is suggested that the Uranium anomaly doesnot commonly occur be-cause of the differences of gochemical conditions around the springs, and only the springs with high content of activated Uranium in groundwater and wall rock are suitable to obser-vation of Uranium content.
with the method of comparative observation, the interpretation is tried, for the first-time,on the relationship between the content anomaly of groundwater Uranium and that ofgroundwater Radon,and on the mechanism of Radon anomaly in groundwater. The feasi-bility of earthquake prediction with groundwater Uranium anomaly is also dealt with.