| 伊犁盆地库捷尔太铀矿床铀成矿地质地球化学条件及找矿意义 |
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| 引用本文： | 谭立群.伊犁盆地库捷尔太铀矿床铀成矿地质地球化学条件及找矿意义[J].铀矿地质,1998,14(3):150-157. |
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| 作者姓名： | 谭立群 |
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| 作者单位： | 西北地质局203研究所!陕西咸阳，712000 |
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| 摘 要： | 本文对库捷尔大层间氧化带砂岩型铀矿床的成矿地质、地球化学条件进行了探讨，阐述了为什么在该矿床8个沉积旋回中都有层间氧化带发育，但以第Ⅴ旋回铀矿化最好，以及煤层在铀成矿过程中的作用等问题。在此基础上，进一步表明了下述观点：（1）本矿床的铀成矿具有双重铀源体系；（2）伊梨盆地的构造条件对铀成矿起了一定的控制作用；（3）煤系天然气（煤成气）中的CH4是本矿床铀成矿过程中的主要还原剂。因此，在含煤盆地层间氧化带砂岩型铀矿的找矿过程中，要加强对煤系天然气圈闭的预测；（4）盆缘的扇三角洲相地层既具有良好的补-迳-排条件，又具有烃类的储集层，因此是层间氧化带砂岩型铀矿成矿的有利部位；（5）地下水迳流区内的局部排泄源在层间氧化带砂岩型铀矿找矿中具有特别重要的意义。
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| 关 键 词： | 层间氧化带 煤系天然气 扇三角洲 局部排泄源 圈闭构造 |
GEOLOGICAL AND GEOCHEMICAL METALLOGENIC CONDITIONS AND PROSPECTING SIGNIFICANCE OF KUJIEERTAI URANIUM DEPOSIT IN YILI BASIN |
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| Tang Liqun.GEOLOGICAL AND GEOCHEMICAL METALLOGENIC CONDITIONS AND PROSPECTING SIGNIFICANCE OF KUJIEERTAI URANIUM DEPOSIT IN YILI BASIN[J].Uranium Geology,1998,14(3):150-157. |
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| Authors: | Tang Liqun |
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| Abstract: | The author discusses geological and geochemical metallogenic conditions of the Kujieertai interlayer oxidation sandstone-type uranium deposit in detail and explains why interlayer oxidation zones were developed in eight sedimentary cycles,but the best mineralization in the fifth cycle,and the role of coal-bearing formation in uranium metallogenic processes etc. Furthermore,following points of view have been concluded: (1)The deposit has two kinds of uranium resources; (2)uranium metallogenesis is controlled by structures to some extent in the Yilibasin; (3)Coal-derived gas CH4 is the main reductant in metallogenic processes, therefore,the prediction of structural traps of coal-derived gas occurrence must be strengthened; (4)Fan delta at the margin of the basin has both good conditions for recharge-run off-discharge and concentration of hydrocarbons,being the best sites for localization of interlayer oxidation sandstone-type uranium deposit; (5)Local discharge zone in the run off area of ground water is of special significance to the exploration for interlayer oxidation sandstone-type uranium deposits. |
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| Keywords: | Interlayer oxidation zone Coal-derived natural gas Fan delta Local discharge area structural trap |
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