Mineralization model for the Early Permian bauxite deposits in Wuchuan-Zheng′an-Daozhen area, northern Guizhou Province
Du Yuansheng1,2, Zhou Qi3, Jin Zhongguo3, Ling Wenli2, Wang Xiaomei2, Yu Wenchao2, Cui Tao2, Lei Zhiyuan3, Weng Shenfu3, Wu Bo3, Qin Yongjun3, Cao Jianzhou4, Peng Xianhong4, Zhang Zhen4, Deng Hu4
1 State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences(Wuhan),Wuhan 430074,Hubei 2 Faculty of Earth Resource, China University of Geosciences(Wuhan),Wuhan 430074,Hubei 3 Bureau of Geology and Mineral Exploration and Development of Guizhou Province,Guiyang 550004,Guizhou 4 Non-ferrous Metals and Nuclear Industry Geological Exploration Bureau of Guizhou Province,Guiyang 550005,Guizhou
Abstract：The Early Permian sedimentary bauxite deposits of Wuchuan-Zheng′an-Daozhen area in the northern Guizhou Province formed in a half-closed bay near the North Guizhou Plain. During the low sea-level in the glaciations,the bay was separated from the Middle Yangtze Bay and became a seashore lake;in interglaciations,the rising sea-level made the area to connect to the Middle Yangtze Bay again. The area can be divided into four palaeographic anits, i.e., North Guizhou Plain,seashore plain,seashore wetland and half-closed bay.The bauxite mineralization was mainly controlled by penecontemporaneous and/or contemporaneous exposure and leaching process,for the earthy and half-earthy bauxite including the earthy and half-earthy pisolitic,oolitic or clastic ore formed during this period.As comparison,compact bauxite did not have or only had a weak leaching process.Clastic and pisolitic/oolitic bauxite formed through the redepositing of intrabasinal mud crack and the cohesion of intrabasinal colloid respectively.The dynamic mineralization modal of bauxite in Wuchuan-Zhengan-Daozhen area indicate that two periods of the penecontemporaneous leaching are the main metallogenic epoch of the bauxite and the palaeogeographical seashore wetland with intense leaching process is the metallogenic prospect district.
Du Yuansheng,Zhou Qi,Jin Zhongguo et al. Mineralization model for the Early Permian bauxite deposits in Wuchuan-Zheng′an-Daozhen area, northern Guizhou Province[J]. JOPC, 2014, 16(1): 1-8.
