摘要
1.Objective Because of the characteristics of multistage mineralization,long duration,relatively new age,and complicated occurrence of ore minerals,dating of sandstone-type uranium deposits has been a challenging problem.For a long time,the whole-rock U-Pb isochronal method has been used in the dating of sandstone-type uranium deposits,but its accuracy has been questioned by experts.
基金
This study is supported by the National Key Research and Development Project(2018YFC0604200)
the International Geoscience Programme(IGCP 675)
the project of Geological Survey China(DD20190119).
