1. State Key Laboratory of Environmental GeochemistryInstitute of Geochemistry, Chinese Academy of SciencesGuiyang China
2. University of Chinese Academy of SciencesBeijing China
3. State Key Laboratory of Ore Deposit GeochemistryInstitute of Geochemistry, Chinese Academy of SciencesGuiyang China
4. John A. Paulson School of Engineering and Applied SciencesHarvard University, CambridgeMassachusetts USA