Coupling between metallogenesis of the Cryogenian Datangpo-type manganese deposit in South China and major geological events
Yu Wen-Chao1,2, Du Yuan-Sheng1,2, Zhou Qi2,3, Wang Ping1,2, Qi Liang1,2, Xu Yuan1,2, Jin Song4, Pan Wen2,5, Yuan Liang-Jun2,5, Xie Xiao-Feng2,5, Yang Bing-Nan2,5
1 State Key Laboratory of Biogeology and Environmental Geology,School of Earth Sciences,China University of Geosciences(Wuhan),Wuhan 430074, China; 2 Innovation Center of Ore Resources Exploration Technology in the Region Bedrock,Ministry of Natural Resources of People's Republic of China,Guiyang 550081, China; 3 Bureau of Geology and Mineral Exploration and Development of Guizhou Province,Guiyang 550004, China; 4 Post-doctoral Scientific Research Workstation,Hebei Bureau of Geology and Mineral Resources Exploration,Shijiazhuang 050081,China; 5 Geological Brigade 103,Guizhou Bureau of Geology and Mineral Exploration and Development,Guizhou Tongren 554300,China
Abstract：The exploration of the Cryogenian manganese deposits in the Datangpo Formation of South China has achieved great progress in recent years. It is concern in the long term there are many studies on this manganese deposits due to its particularity in the temporal and spatial distribution and the mineralization background. In this paper,we systematically summarize the previous achievements on the Datangpo-type manganese deposits. Besides,we also review current findings of Neoproterozoic global geotectonics,palaeoclimate evolution,ancient marine chemistry,and microbial evolution etc. The possible linkage between the massive metallogenesis of the Cryogenian Datangpo manganese deposits in the South China and Neoproterozoic major geological events is established. The break-up of Rodinia supercontinent led to the widespread rift basin systems in the world since the Middle Neoproterozoic. The Nanhua Basin in South China,which is a manganese-forming sedimentary basin,developed from the rift basin. The rift basin provided space for manganese deposits and controlled the distribution of manganese deposit. The hydrothermal activities at the bottom of the basin provided favorable manganese source. During the Neoproterozoic ice period(“Snowball Earth”event),global ice-sheets cut off or hindered exchanges of mass and energy between different spheres of Earth,which may lead to the widespread anoxic condition in the ice age ocean. The palaeoclimate changes during the glacial-interglacial period led to the disappearance of ice-sheets and the triggering of mass and energy exchanges between different sub-systems of Earth,followed by the variation of redox condition of the ancient sea. For the Nanhua Basin,the oxidation of surface water and the oxygen-bearing base flow provided the oxidation environment for the precipitation of manganese. Besides,new evidence indicated that manganese microbiological mineralization was the potential mechanism for manganese deposit under the microbial resuscitation condition during the interglacial period. All these major geological events have complicated connections and they provided essential metallogenic conditions for the sedimentary mineralization of “Datangpo”manganese deposit. It is believed that there is a coupling between the sedimentary metallogenesis of the Cryogenian Datangpo-type manganese deposit in South China and Neoproterozoic major geological events.
Yu Wen-Chao,Du Yuan-Sheng,Zhou Qi et al. Coupling between metallogenesis of the Cryogenian Datangpo-type manganese deposit in South China and major geological events[J]. JOPC, 2020, 22(5): 855-871.
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