1. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Guangzhou 510640, China
2. CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China
3. University of Chinese Academy of Sciences, Beijing 100049, China
4. Wuxi Research Institute of Petroleum Geology, Petroleum Exploration and Production Research Institute, SINOPEC, Wuxi 214126, China