[1]State Key Laboratory of Biogeology and Environmental Geology;
China University of Geosciences (Beijing);
Beijing 100083;
China;
[2]lnstitute of Earth Sciences;
China University of Geosciences (Beijing);
Beijing 100083;
China;
[1]State Key Laboratory of Biogeology and Environmental Geology;
China University of Geosciences (Beijing);
Beijing 100083;
China;
[2]lnstitute of Earth Sciences;
China University of Geosciences (Beijing);
Beijing 100083;
China;
[1]State Key Laboratory of Biogeology and Environmental Geology;
China University of Geosciences (Beijing);
Beijing 100083;
China;
[3]School of Earth Sciences and Resources;
China University of Geosciences (Beijing);
Beijing 100083;
China;
[4]National Research Center for Geoanalysis;
Beijing 100037;
China;
[5]Key Lab of Petroleum Resources Research;
Institute of Geology and Geophysics;
Chinese Academy of Sciences;
Beijing 100029;
China;
[3]School of Earth Sciences and Resources;
China University of Geosciences (Beijing);
Beijing 100083;
China;
[3]School of Earth Sciences and Resources;
China University of Geosciences (Beijing);
Beijing 100083;
China;
[6]State Key Laboratory of Biogeology and Environ mental Geology;
China University of Geosciences (Wuhan);
Wuhan 430074;
China;
Mid-Proterozoic; Carbonate concretion; Early diagenesis; Manganese reduction; Bicarbonate;