1. State Key Laboratory of Ore Deposit Geochemistry; Institute of Geochemistry, Chinese Academy of Sciences; Guiyang 550002 China
2. US Geological Survey; 954 National Center; Reston VA 20192 USA
3. Laboratory for Experimental Study Under Deep-sea Extreme Conditions; Sanya Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences; Sanya 572000 China
4. US Geological Survey; 956 National Center; Reston VA 20192 USA