Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;
State Key Lab. of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640;
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;
State Key Lab. of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640;
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;
paleosol layer S5-1; Xifeng and Duanjiapo sections; magnetic mineral ( 30μm); Fe-Ti oxide series; redox environment;