Geochemistry study of uranium and other element in brown coal of ZK0407 well in Yili basin
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摘要: 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。Abstract: The geochemical behavior of 59 constant and trace elements in brown coal of ZK0407 well located at Honghaigou area in Yili basin of Xinjiang, China, was examined by mathematical statistics methods. It is showed that the elements in ash is opposite number with those in inherent moisture and in fixed carbon, and has synchronous changes with those in volatile matter. ZK0407 well has been located at interlayer oxidation zones and was uranium bonanza in geological history. Now, it is the wing of mineralization under interlayer oxidation zone. Uranium maybe mainly exist in the pore of brown coal and clay fraction in coal by manner of physical adsorption.
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Key words:
- Yili basin /
- brown coal /
- uranium /
- trace elements
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