The Research of the Mineralogical and Element Geochemical Characteristics of Bauxite in Yunfeng, Qingzhen, in Central Guizhou Province, China

摘要

The mineralogical and geochemical characteristics of the Yunfeng bauxite in Qingzhen were investigatedthrough the handle specimen observation, thin section analysis, XRD、SEM and Element geochemistry. The mineralanalyses reveal that diaspore, kaolinite and chlorite are the major minerals in the bauxite with small amounts of boehmiteand pyrite. Geochemical investigations reveal that the main components in the bauxite are Al2O3, SiO2 and TFe2O3, theminorcomponents are TiO2, MgO and P2O5. In the process of weathering, some trace elements, such as Zr, Cr, Nb and Hf,are enriched. Zr vs Hf and Nb vs Ta display higher positive correlation. Trace elements show that Loushanguan Formationis the main source of material for the bauxite formation and there may be exist other precursor rock provide fewmaterial for the bauxite formation. Ore deposit formed in a O-poor,reducing Marine sedimentary environment.