1. State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
2. College of Resources and Environment, South China Agricultural University, Guangzhou 510642, China
3. School of Biology and Food Engineering, Guangdong University of Education, Guangzhou 510303, China
4. CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China