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用数理统计的方法,对伊犁盆地洪海沟地区ZK0407井的中下侏罗统10、11、12号煤层中的铀等59种常量元素、微量元素的地球化学行为进行了探讨。结果表明,元素在灰分的分布和元素在内在水分以及固定碳中的分布呈互为相反数关系,而和元素在挥发分中的分布变化具有同步性。元素和挥发分呈正相关很大程度是因为元素的催化作用和矿物分解产生的一些挥发性组分所造成。ZK0407井在地史上一直位于砂岩层间氧化带的氧化-还原过渡地段,因而也是铀的富矿地段。其煤层为层间氧化带成矿的下翼。U等元素在褐煤中主要以物理吸附的方式存在于其孔隙之中或泥质组分中,有机质对其络合束缚作用,并非U在褐煤中的唯一富集方式。
By means of mathematical statistics, the geochemical behaviors of 59 kinds of trace elements and trace elements, such as uranium, in the middle and lower Jurassic coal seams 10, 11 and 12 in ZK0407 well in Honghaigou area of Ili Basin are discussed. The results show that the distribution of elements in the ash and the distribution of elements in the intrinsic moisture and the fixed carbon are in opposite relationship with each other, and the distribution of the elements in volatiles is in synchrony. The positive correlation between the element and the volatility is due to the catalytic effect of the element and some volatile components from the mineral decomposition. Well ZK0407 has historically been located in the oxidation-reduction transitional zone of the sandstone interlayer oxidation zone and is therefore also a uranium-rich area. The coal seam is the lower wing of the interlayer oxidation zone mineralization. U and other elements in the lignite mainly in the form of physical adsorption exists in its pores or muddy components, organic matter on its complex binding role, not the only enrichment of U in lignite.