1. International Centre for Planetary Science College of Geosciences Chengdu University of Technology Chengdu 610059 China
2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Chengdu University of Technology) Chengdu 610059 China
3. State Key Laboratory of Isotope Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China