| 试论砂岩型铀矿成矿机制和成矿作用动力学问题 |
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| 引用本文： | 李巨初.试论砂岩型铀矿成矿机制和成矿作用动力学问题[J].铀矿地质,2009,25(3):129-136. |
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| 作者姓名： | 李巨初 |
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| 作者单位： | 成都理工大学地球化学系,四川,成都,610059 |
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| 摘 要： | 文章初步讨论了我国北方表生、后生、渗入型砂岩型铀矿的成矿机制和成矿作用动力学问题。成矿作用包括了氧化-还原作用、有机质作用、水-岩相互作用、有机-无机作用和流体动力学等地球化学过程动力学,尤其是水-岩相互作用的流体输运-化学反应过程动力学和有机-无机作用过程。砂岩型铀矿成矿中地球化学障的形成和铀的富集是这些过程多重耦合的结果。识别这些地球化学过程的动力学机制有利于理解矿床成因和确立勘查目标。
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| 关 键 词： | 砂岩型铀矿 地球化学障 铀富集 成矿作用 动力学 |
Primary discussion on metallogenic mechanism and dynamics of sandstone-hosted uranium deposits in China |
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| LI Ju-chu.Primary discussion on metallogenic mechanism and dynamics of sandstone-hosted uranium deposits in China[J].Uranium Geology,2009,25(3):129-136. |
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| Authors: | LI Ju-chu |
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| Institution: | LI Ju-chu(Department of Geochemistry,Chengdu University of Technology,Chengdu 610059,China) |
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| Abstract: | This paper delivered a primary discussion on metallogenic mechanism and dynamics of sandstone-hosted uranium deposits in China.These deposits are classified into Exogenic,epigenetic and infiltration-type according to uranium mineralization and are believed to be controlled by a multi-coupled process including redox,organic absorption,water-rock interaction process and fluid dynamics constrain,which cause geochemical barrier and the precipitation of uranium and associated elements.Great attention should be paid to dynamic model of dissolution-transportation-precipitation so as to identify the deposit genesis and exploration target. |
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| Keywords: | sandstone-hosted uranium deposit geochemistry barrier uranium mineralization dynamics |
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