1. a CAS Key Laboratory of Crust-Mantle Materials and Environments , University of Science and Technology of China , Hefei , 230026 , PR China
2. b State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry , Chinese Academy of Sciences , Guiyang , 550002 , PR China
3. c CAS Key Laboratory of Isotope Geochronology and Geochemistry, Guangzhou Institute of Geochemistry , Chinese Academy of Sciences , Guangzhou , 510640 , PR China
4. d Department of Geology , University of Maryland , College Park , Maryland , 20742 , USA
5. e No. 327 Geological Team, Anhui Bureau of Land and Mineral Resources , Hefei , 230001 , PR China