1. State Key Laboratory of Isotope Geochemistry; Guangzhou Institute of Geochemistry; Chinese Academy of Sciences; Guangzhou 510640 China
2. Key Laboratory of Marginal Sea Geology; South China Sea Institute of Oceanology; Chinese Academy of Sciences; Guangzhou 510301 China
3. ARC Centre of Excellence for Core to Crust Fluid Systems (CCFS) and The Institute for Geoscience Research (TIGeR); Curtin University; GPO Box U1987 Perth 6845 Australia