| 几个铀矿床碱交代作用中重砂矿物变化的研究 |
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| 引用本文： | 程华汉,杜乐天.几个铀矿床碱交代作用中重砂矿物变化的研究[J].铀矿地质,1998,14(1):26-31. |
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| 作者姓名： | 程华汉 杜乐天 |
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| 作者单位： | 核工业北京地质研究院!北京，100029，核工业北京地质研究院!北京，100029 |
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| 摘 要： | 本文通过对碱交代作用前后岩石中重砂矿物──晶质铀矿、锆石、榍石和含铁氧化物等的研究，得出如下结论：在碱交代作用中，含铀副矿物由于在碱性热液中不稳定而大量减少，残留副矿物的铀含量也比交代前减少，其释放出的铀遂成为热液中的铀源之一；碱交代热液呈氧化性质，致使碱交代岩由于高价铁氧化物含量增高而普遍发生“红化”；一些硅酸盐矿物，如石榴石、角闪石、黑云母、榍石等也由于在碱性热液中不稳定而分解。
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| 关 键 词： | 重砂矿物 碱交代 铀矿床 |
STUDY ON HEAVY MINERALS OF SOME URANIVM DEPOSITS |
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| Cheng Huahan, Du Letian.STUDY ON HEAVY MINERALS OF SOME URANIVM DEPOSITS[J].Uranium Geology,1998,14(1):26-31. |
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| Authors: | Cheng Huahan Du Letian |
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| Abstract: | Based on the study of heavy minerals such as uraninite, zircon, sphene, and iron oxides in alkali metasomatically altered and unaltered rocks some conclusions are proposed in this paper:during alkali metasomatism, the amount of uraniferous heavy minerals decreases because of their instability in alkaline hydrothermal solution and uranium content in those remained heavy minerals is lower than that in metasomatically unaltered rocks. The uranium released becomes one of uranium soutrces in hydrothermal solution. Since the oxidizing nature of hydrothermal solution alkali metasomatite is generally red due to the dispersed hematite. Some silicates such as granat hornolende, biotite, sphene are disintegrated. |
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| Keywords: | Heavy mineal Alkali-metasomatism Uranium Deposit |
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