1 State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China; Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA 92093-0021, USA. Electronic address: linm@gig.ac.cn.
2 University of Chinese Academy of Sciences, Beijing 100049, China; State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China.
3 University of Chinese Academy of Sciences, Beijing 100049, China; State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing 100101, China.
4 College of Environmental Science and Engineering, China West Normal University, Nanchong 637009, China.
5 Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA 92093-0021, USA.