高纯石英砂原料矿中流体包裹体研究

高纯石英砂作为一种重要的非金属电子新材料，对原料中包裹体杂质元素要求较高，其中包裹体的存在对其纯度及性能有重要影响。据此，对国外某脉石英矿中包裹体采用光学显微镜、X射线衍射、等离子体原子发射光谱、显微测温和激光拉曼光谱等多项测试方法，进行了详细的研究。结果显示:矿石中SiO₂含量>99.9%，杂质元素主要为Al、碱金属元素、Fe；原料中包裹体为单相盐水溶液包裹体、两相盐水溶液包裹体和含CO₂三相包裹体，无固相包裹体。两个样品包裹体的均一温度分别为120～270℃、90～140℃，表明该矿床为中低温热液变质石英岩。原矿经过包裹体剔除、杂质元素降低后可作为高纯石英砂原料。 

Research on Fluid Inclusions in Vein Quartz as Higher Purity Quartz Sand

As an important new non-metallic electronic material, higher-purity quartz sand has high requirements on impurity elements in inclusions of raw materials．Besides that , the presence of inclusions has an important impact on its purity and performance．Based on this, the fluid inclusions in the vein quartz abroad have been studied in detail by using optical microscope, X-ray diffraction, plasma atomic emission spectroscopy, micro temperature measurement and laser Raman spectroscopy．The results show that the content of SiO₂ in the ore is beyond 99.9%, and the impurity elements are mainly Al, alkali metal elements and Fe．The inclusions in the quartz are single-phase saline solution inclusions, two-phase saline solution inclusions and containing CO₂ three-phase inclusions．There is no solid inclusions in the ore．The uniform temperatures of the two samples inclusions are 120～270℃ and 90～140℃．As a result, the deposit of the ore is medium-low temperature hydrothermal metamorphic quartzite．The raw ore can be used as the raw material of higher purity quartz sand after inclusion elimination and impurity reduction.