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遵义铝土矿成矿区是贵州省的主要成矿区之一,其铝土矿层大多赋存于下石炭统九架炉组。文章运用薄片鉴定、X射线粉晶衍射及扫描电子显微镜等多种分析测试方法,研究了铝土矿的矿物组成、含量及晶体形态,认为铝土矿成矿过程中不同层位一水硬铝石的晶体形态有所差异,且一水硬铝石含量与粘土矿物及石英含量均呈此消彼长的关系。同时,分析含矿岩系组构和元素地球化学特征得出,遵义仙人岩、后槽和新站3个矿区铝土矿的成矿物质来源极有可能同源且与其基底有关,成矿过程中成矿母岩在氧化还原条件交替的沉积环境下经历了较为充分的均一化,反映了成矿过程与古风化壳作用的一致性。上述的矿物学及地球化学特征标志对铝土矿的找矿和选矿具有一定的指示意义。
Zunyi bauxite mineralization area is one of the major metallogenic areas in Guizhou Province. Most of the bauxite layers occur in nine Lower Carboniferous furnaces. In this paper, the mineral composition, content and crystal morphology of bauxite are studied by means of thin-plate identification, X-ray powder diffraction and scanning electron microscopy. It is considered that the different layers of one-layer aluminum The crystal morphology of the stone is different, and the content of diaspore and the content of clay minerals and quartz show a shift. At the same time, analyzing the structure and element geochemical characteristics of the ore-bearing rock series, it is concluded that the sources of ore-forming materials of the bauxite in the Zunyi cinnabar, Houhou tao and Xinxin station are likely to be homologous and related to the basement, and the mineralization process The middle-metallogenic host rocks experienced a more adequate homogenization under the alternate depositional conditions of redox conditions, reflecting the consistency of the mineralization process with the paleo-weathering crust. The above mineralogical and geochemical characteristics of the sign of bauxite prospecting and beneficiation has some significance.