通过手标本观察、探针片镜下鉴定、XRD分析、扫描电镜分析等手段对黔北务川?正安?道真地区铝土矿的矿物学特征和地球化学特征进行研究。务正道铝土矿主要矿物为硬水铝石、高岭石、绿泥石、伊利石，次要矿物为软水铝石与黄铁矿，铝土矿常量元素以Al 2 O 3、SiO 2和TFe 2 O 3为主，MgO和TiO 2含量次之。风化过程中Zr、Cr、V、Li等微量元素明显富集，Zr和Hf以及Nb和Ta 呈高度正相关关系。微量元素比值表明：务正道铝土矿是以韩家店组页岩为主，黄龙组灰岩为辅，并有其余物源混入的多物源体系。
The mineralogical and geochemical characteristics of the bauxite in Wuchuan-Zheng’an-Daozhen area were investigated through the handle specimen observation, thin section analysis, XRD and SEM. The mineral analyses reveal that diaspore, kaolinite, chlorite and illite 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 Al 2 O 3 , SiO 2 and TFe 2 O 3 , the minor components, are MgO and TiO 2 . In the process of weathering, some trace elements, such as Zr, Cr, V and Li, are enriched. Zr vs Hf and Nb vs Ta display the highest positive correlation. Trace elements show that Hanjiadian Formation is the main source of material for the bauxite formation, Huanglong Formation is the second important parent rock and there may be exist other precursor rock provide few material for the bauxite formation.
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