Abstract: On the basis of regional geological investigation,field samples and measurement indoor,the paper studied on the hydrogeochemical characteristics of groundwaters in Makeng district,pointed out that some trace elements could be used for distinguishing different kinds of groundwater,analyzing the cause of abnormality of trace elements in groundwater,and judging the activity level of groundwater and characteristics of rare earth elements(REE),providing the credible reasons for judging the source of ...