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准确测定各种矿物中的微量元素含量,对岩石成因、矿床成因、成矿规律等的研究都具有重要的意义。测定矿物中微量元素含量的方法很多,如化学分析、光谱分析、X射线萤光分析、中子活化分析等。其中中子活化分析具有样品用量少、灵敏度高、快速,基本不破坏样品和能同时测定多种元素等优点,因此在矿物的微量元素分析中得到了较广泛地应用。 本文以美国地质调查所标准岩石粉末样品G-1作为直接多元素标准,采用热中子仪器活化分析,用相对比较法,对某铀矿床中的浅绿色萤石、浅紫色萤石、紫黑色萤石、白色方解石、粉红色方解石和花岗岩中的石英、黑云母、长石等矿物中的微量元素进行了测定。
Accurate determination of trace elements in various minerals is of great significance to the study of rock genesis, genesis and metallogenic regularity. Determination of trace elements in minerals in many ways, such as chemical analysis, spectral analysis, X-ray fluorescence analysis, neutron activation analysis. Among them, the neutron activation analysis has the advantages of less sample amount, high sensitivity, fastness, little damage to the sample and the simultaneous determination of many elements. Therefore, it has been widely used in the trace element analysis of minerals. In this paper, the Geological Survey of the United States as a standard sample of rock powder G-1 as a direct multi-element standard, the use of thermal neutron instrument activation analysis, the relative comparison method, a uranium deposit of light green fluorite, light purple fluorite, purple black Fluorite, white calcite, pink calcite and granite in quartz, biotite, feldspar and other minerals in the trace elements were determined.