| 华南T岩体白云母化与铀活化的关系 |
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| 引用本文： | 龚温书,黄伟良,何通俊.华南T岩体白云母化与铀活化的关系[J].铀矿地质,1986(3). |
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| 作者姓名： | 龚温书 黄伟良 何通俊 |
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| 摘 要： | 白云母化是华南许多花岗岩型铀矿床常见的“前提蚀变”。T岩体白云母化呈面型分布,黑云母转变为白云母后,单位晶胞体积缩小,在等容交代条件下,粒间空隙增多,导致岩石孔隙度增加,为活化出来的铀准备了空间和迁移通道。黑云母在结晶过程中,吸附和隐晶捕获的铀及所包裹的副矿物中的铀也部分活化,引起铀配分的调整,使分散、吸附形式的铀增加。铀存在形式的转变和初步浓集,对花岗岩型铀矿床的形成是不可少的成矿机制之一。
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| 关 键 词： | 白云母化 花岗岩型铀矿床 活化 初步浓集 |
RELATIONSHIP BETWEEN MUSCOVITIZATION AND MOBILIZATION OF URANIUM IN THE ROCK MASS T OF SOUTH CHINA |
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| Gong Wenshu Huang Weiliang He Tongzun.RELATIONSHIP BETWEEN MUSCOVITIZATION AND MOBILIZATION OF URANIUM IN THE ROCK MASS T OF SOUTH CHINA[J].Uranium Geology,1986(3). |
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| Authors: | Gong Wenshu Huang Weiliang He Tongzun |
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| Institution: | Gong Wenshu Huang Weiliang He Tongzun |
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| Abstract: | Muscovitization is a "prerequisite alteration" frequently occurred in many granite-type uranium deposits in South China. Muscovitization of rock mass T is of face distribution. Following transformation of biotite into muscovite, volume of unit crystal cell decreases, causing the decrease in volume of mineral. Under the condition of isochoric replacement intergranular space increases, causing the increase in porosity of rock, which leaves space for uranium mobilized and passage for subsequent uranium transfer. During crystallization of biotite, uranium captured by adsorption and cryptocrystal and isomorphous uranium in accessory minerals envelo ped are partially released following muscovitization. Uranium in accessory minerals of rock is also partially mobilized, causing adjustment of distribution of uranium composition as well as the increase in uranium scattered and adsorbed. Transformation of uranium forms and initial concentration are one of the essential minerogenetic mechanism for the formation of granite-type uranium deposit. |
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| Keywords: | Muscovitization Granite-type uranium deposits Mobilization Initial concentration |
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