Characteristics of metallogenic formation,basin prototype and manganese facies belt of the Permian Maokou Formation in Zunyi area,Guizhou Province
Wang Yang1, Liu Zhi-Chen1,2,3, Chen Deng1,2, Xiao Lin1, Xiao Liang1
1 Geological Brigade 102,Bureau of Geology and Mineral Exploration and Development of Guizhou Province,Guizhou Zunyi 553003,China; 2 School of Earth Sciences,China University of Geosciences(Wuhan),Wuhan 430074,China; 3 Innovation Center of Ore Resources Exploration Technology in the Region Bedrock, Ministry of Natural Resources of People's Republic of China,Guiyang 550081,China
Abstract：In order to improve the exploration efficiency and reduce the risks and costs of prospecting and exploration,a prediction model for deep prospecting of the Permian manganese deposit in Zunyi area,Guizhou Province was established in this paper. In recent years,four geological maps with the scale of 1︰50000 were established through the project of “Mineral Geological Survey and Prospecting Prediction in Zunyi Manganese Mine Integral Exploration Area,Guizhou”,and the manganese ore formation,basin prototype,and manganese facies belt characteristics of the Permian Maokou Formation in Zunyi,Guizhou have been summarized. In this paper,according to different lithological combinations,structural structures,six types of deposition combinations were found in the manganese mineralization period of the Third Member of Maokou Formation,including manganese-rich formation,manganese-poor formation,manganese-bearing formation,clay rock formation,silicified rock formation and biological limestone formation. Furthermore,the characteristics of central facies,transition facies and marginal facies of the manganese ore are summarized. The prototype of the basin was analyzed from the thickness of stratum,silicified breccia,special sedimentary structure,and AMT geophysical signs. The theories mentioned above were used to guide the manganese prospecting. Three fully hidden prospecting target areas have been delineated,which provide a basis for drilling projects. From 2018-2019,four boreholes were constructed in the Xiejiaba prospecting target area and thick manganese ore bodies were found in all boreholes,and more than 22 million tons manganese ore have been detection. This shows that the theoretical and methods presented in this paper are effective for deep prospecting of manganese ore in Zunyi area.
Wang Yang,Liu Zhi-Chen,Chen Deng et al. Characteristics of metallogenic formation,basin prototype and manganese facies belt of the Permian Maokou Formation in Zunyi area,Guizhou Province[J]. JOPC, 2020, 22(5): 989-1000.
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