| 试论铀成矿的热渗滤机制 |
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| 引用本文： | 章邦桐.试论铀成矿的热渗滤机制[J].铀矿地质,1987(2). |
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| 作者姓名： | 章邦桐 |
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| 摘 要： | 本文应用热渗滤作用理论,对部分产出在花岗岩体外接触带沉积围岩中的热液铀矿床的形成机制作出合理的解释。在分析热渗滤作用特点及部分岩石热渗滤系数并详细对比了天然岩石中五种存在形成H_2O的物理化学性质的基础上,作者认为参与热渗滤作用的主要是存在于矿物颗粒表面和岩石微裂隙中的结合水(薄膜水和分子结合水)。位于热渗滤带的富铀地层中的H_2O及溶解于其中的铀在热渗滤作用下将朝岩体接触带的增温方向迁移。与传统的概念相反,作者指出。成矿溶液是从矿物粒间和岩石微裂隙朝成矿断裂构造方向运移,尔后在物化条件急剧变化的地段沉淀并逐步富集形成具有工业价值的铀矿床。
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| 关 键 词： | 热渗滤 结合水 |
ON THE THERMOOSMOTIC FILTERING MECHANISM OF URANIUM METALLIZATION |
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| Zhang Bangtong.ON THE THERMOOSMOTIC FILTERING MECHANISM OF URANIUM METALLIZATION[J].Uranium Geology,1987(2). |
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| Authors: | Zhang Bangtong |
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| Institution: | Zhang Bangtong |
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| Abstract: | It is attempted to apply the thermoosmotic filtering theory to explanation of the formation mechanism of the hydrothermal uranium deposits, which occur in sedimentary rocks of exocontact zone near granite massirs. On the basis of physicochemical properties of H_2O occurred in 5 forms in natural rocks, it is considered that it is mainly the bond water which took an active part in the thermoosmotic flltering. The H_2O included in the thermoosmotic filtering zone of uranium-bearing stratum and the uranium dissolved in the latter tend to migrate toward the contact zone of granitoid with increasing temperature. In contrast to the traditional concept, the ore-forming flurd moved from mineral interstices and microfissures in rocks to ore-bearing fault zone, then uranium was deposited in an area with sharp physicochemical change and was progressively enriched to form economic valuable uranium deposits. |
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| Keywords: | Thermoosmotic filtering Bond water |
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