Affiliation: | ZHAI QingGuo1 WANG Jun1,LI Cai2 & SU Li3 1 Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China,2 College of Earth Sciences,Jilin University,Changchun 130061,3 The Geological Laboratory Center , State Key Laboratory of Geological Processes , Mineral Resources,China University of Geo- sciences,Beijing 100083 |