靖西三合铝土矿微量元素地球化学特征与成矿环境研究

Analysis on trace-element geochemical characteristics and ore-forming environment of bauxite mine in Sanhe town of Jingxi county

采用发射光谱法(ES)、X-射线荧光光谱法(XRF)、等离子体质谱法(ICP-MS)等方法,对广西省靖西县三合铝土矿区7个典型堆积铝土矿石样品中的硼(B)、镓(Ga)、铍(Ga)、锶(Sr)、钡(Ba)、钍(Th)及铀(U)等7个对沉积环境指示性较好的微量元素进行含量测试分析和相关比值计算等地球化学特征研究,以此探讨该区铝土矿的成矿作用与成矿环境.研究认为,本区铝土矿的微量元素地化特征表明铝土矿成矿物质来源多样,并显示出了明显的淡水沉积物特征,沉积环境陆相特征明显,局部存在残积作用,沉积后受到明显的海水改造作用.

By using the ES, XRF and ICP - MS methods, the ratio of seven kinds of elements such as B, Ga, Ga, Sr, Ba, Th and U, whose indicating good effects on sedimentary environment in seven bauxite samples from the Sanhe deposit in Jingxi county are studied and calculated. The results show that the bauxite ore- forming material source is diversity. The freshwater sediment characteristics and the continental sedimentary environment is significantly. The eluvial effect is partial exisiting and the reconstruction of seawater is clear existence after the sedimentation ending.