| The Xianrenyan bauxite deposit in Zunyi located in Lower Carboniferous Jiujialu Formation,the Xianrenyan Syncline in NE-SW trending is the main structure in the deposit.and the ore is layered, lenticular,which occurrence in the central and upper of the ore-bearing rocks.The main mimeral composition of the ore is the diaspore,and the average level of the main chemical composition is A12O3(57.45%), SiO2(8.27%)、Fe2O3(17.73%)、TS(0.128%).The main texture is clastic texture,bean oolitic texture,crystal texture and crystal texture,and the main structure of the ore is blocky structure,half earth structure and compact structure.Natural types of ores are half earthy bauxite,bean oolitic bauxite,compact bauxite and clastic bauxite.The industrial type of the ores have low sulfur bauxite,high-speed rail low sulfur type bauxite.The thickness of the ore-bearing rocks in the deposit has a clear dependence with the karst topogaphy,and the thickness of the bauxite deposit and the concentration of the Aluminum has a strong correlation with the thickness of the ore bearing rocks.Through large amounts of data analysis,in terms of the bauxite in Zunyi in north of Guizhou,ore-bearing rocks in the bauxite deposit is always occurrence on the surface of ancient carbonate rocks basement which is erosion surface, and the size,thickness and grade level of the bauxite is strictly controlled by the development of the ore-bearing rocks,which is that the thickness and grade changing of the bauxite has a positive correction with the thickness of the ore-bearing rocks.Exploring for the bauxite in Zunyi in north of Guizhou,geophysical methods can be used to circle the ancient karst potholes basement closely related with the enrichment of the bauxite first,and then laid drilling in the potholes for exploration and exposing of the deep ore.The method such as’from known to unknown’,’from shallow to deep’and’exploration network degree’are not be used for ideal prospecting results. |
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