1. State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510 640, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
3. Dipartimento di Chimica, Università degli Studi di Torino, Via Pietro Giuria 5, Torino 10125, Italy
4. Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Science, Guangzhou 510640, China
5. CAS Center for Excellence in Deep Earth Science, Chinese Academy of Science, Guangzhou 510640, China