| 确定砂岩型铀矿矿化地段的铀、钍同位素证据 |
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| 引用本文： | 刘金辉.确定砂岩型铀矿矿化地段的铀、钍同位素证据[J].矿床地质,1999,18(3):262-267. |
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| 作者姓名： | 刘金辉 |
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| 作者单位： | 华东地质学院,江西临川 |
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| 基金项目： | 核能资源开放实验室资助项目 |
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| 摘 要： | 根据铀、钍同位素地球化学基本原理，对新疆伊梨盆地５１２矿床含矿砂岩的Ｕ、Ｔｈ含量及其＾２３４Ｕ／＾２３８Ｕ、＾２３０Ｔｈ／＾２３２Ｔｈ进行了测试，并在此基础上对含矿砂岩的氧化带、还原带和氧化还原过渡带特征进行了研究。研究表明，与氧化带、还原带相比，氧化－还原过渡带具有较高Ｕ含量和＾２３４Ｕ／＾２３８Ｕ比值，较低Ｔｈ／Ｕ比值；矿石样品中的＾２３４Ｕ／＾２３８Ｕ、＾２３０Ｔｈ／＾２３８Ｕ比值位于过渡带
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| 关 键 词： | 层间氧化带 放射性同位素 同位素比值 砂岩型铀矿 新疆伊犁 |
Uranium and Thorium isotopic evidence for determining mineralized sectors of the sandstone type Uranium deposit |
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| Liu Jinhui.Uranium and Thorium isotopic evidence for determining mineralized sectors of the sandstone type Uranium deposit[J].Mineral Deposits,1999,18(3):262-267. |
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| Authors: | Liu Jinhui |
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| Abstract: | On the basis of the basic principle of uranium and
thorium isotopic geochemistry,the author determined the U and Th content as well as 234
U/ 238 U, 230 Th/ 232 Th and 230 Th/ 238 U ratios of ore bearing
sandstone,and studied characteristics of the oxidation zone,the reduction zone and redox
transition zone in No.512 deposit,Ili basin,Xinjiang.The results suggest that the uranium content
and 234 U/ 238 U ratios in the sandstone of the redox transition zone are generally
higher than those of the oxidation and reduction zones,while the Th/U ratios of the transition
zone are lower than those in sandstone of the oxidation zone and the reduction zone. 234
U/ 238 U and 230 Th/ 238 U ratios in uranium ore samples are in the range of
their ratios in the redox transition zone.The high value areas of 234 U/ 238 U ratios
are often consistent with the distribution areas(the uranium precipitation areas)of the transition
zone.It is obvious that important evidence for locating mineralized sectors of the sandstone
type uranium deposit may be provided by the U and Th content as well as Th/U, 234 U/
238 U and 230 Th/ 238 U ratios in the sandstone. |
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| Keywords: | interformational oxidation zone radioactive isotope isotopic radio sandstone type uranium deposit Ili of Xinjiang |
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