State Key Laboratory of Ore Deposit Geochemistry;
Institute of Geochemistry;
Chinese Academy of Sciences;
University of Chinese Academy of Sciences;
Key Laboratory of Petroleum Resources;
Gansu Province;
Key Laboratory of Petroleum Resources Research;
Institute of Geology and Geophysics;
Chinese Academy of Sciences;
Dounan manganese deposit; Metallogenetic environment; Mössbauer spectroscopy; Geochemistry;