The mineralogical and geochemical characteristics of the Yunfeng bauxite in Qingzhen were investigated
through the handle specimen observation, thin section analysis, XRD、SEM and Element geochemistry. The mineral
analyses reveal that diaspore, kaolinite and chlorite are the major minerals in the bauxite with small amounts of boehmite
and pyrite. Geochemical investigations reveal that the main components in the bauxite are Al2O3, SiO2 and TFe2O3, the
minorcomponents 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 Formation
is the main source of material for the bauxite formation and there may be exist other precursor rock provide few
material for the bauxite formation. Ore deposit formed in a O-poor,reducing Marine sedimentary environment.