LI Chao, PENG Ping''''an, SHENG Guoying, FU Jiamo, YAN Yuzhong) Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, ) Tianjin Institute of Geology, Mineral Resources, China Geological Survey, Tianjin,.2002. A Carbon Isotopic Biogeochemical Study of Meso- to Neoproterozoic Sediments from the Jixian Section, North China[J]. Acta Geologica Sinica,76(4):433-440