During project execution, Qing-tian Lü, the chief of the deep geological survey engineering, Shu-wen Dong, the chief scientist, academician Rui Gao, researcher Zong-li Huang, De-wu Qiao, professor Xing-zhou Zhang, Jian-bo Zhou and other experts give thoughtful guidance to us. China Geological Survey of leaders at all levels enhance the level of project research, concise, paid a hard sweat and wisdom. The editors of China Geology and two reviewers have put forward valuable opinions and suggestions. The authors wish to express our heartfelt thanks to the above experts, leaders and colleagues who are eager to offer help. This study was jointly supported by the Chinese Geological Survey Program (DD20160207, DD20189702), the National Natural Science Foundation of China (41474081) and the SinoProbe-02 program. （DD20160207, DD20189702）