Xiao-Cui Chen1, Cheng-Hai Zhao2, Jing-Jing Zhu2, Xin-Song Wang2, Tao Cui1
1Guizhou Institute of Technology, Guiyang 550003, China
2State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550005, China