| 粤、桂、湘、黔及秦岭地区碳酸盐岩中某些层控铀矿床的沉积环境控制 |
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| 引用本文： | 卓维荣.粤、桂、湘、黔及秦岭地区碳酸盐岩中某些层控铀矿床的沉积环境控制[J].铀矿地质,1985(2). |
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| 作者姓名： | 卓维荣 |
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| 摘 要： | 含矿层的沉积环境及其物质表现是我国湘、桂、粤、黔及秦岭地区碳酸盐岩中某些层控铀矿床成矿控制的基本因素。矿化在剖面上处于含矿岩系的沉积环境中沉积物性质、海水能量条件、Eh、pH等因素随时间演化的变异界面附近;矿化在空间上位于含矿岩系的沉积环境中隆起带与洼陷带间的变异部位。矿化带的分布与沉积环境的上述变异带或过渡带一致。因此,这类矿床成矿的远景地区是属于一定地质时代的古陆边缘海盆与陆表海盆的过渡带,或弧间海盆与陆缘和滨外台地的过渡带。广阔的陆表海碳酸盐岩台地不利于这类矿床的形成。我国粤、桂、湘、黔诸省及秦岭地区的碳酸盐岩中均产有层控型铀矿床。过去在研究这些矿床的成矿条件时,常只把地层岩性看作被动的容矿空间或有利于矿液交代作用的场所。近年来,笔者在找矿实践中试用现代沉积和层控矿床理论对某些矿床进行了研究,认为矿床最终成矿虽均与一定的构造-热液作用有关,但矿床的成生分布又严格的受沉积环境的控制。沉积环境及其物质表现是控制成矿的基本因素。本文是阐述这种控制并讨论这种控制机理的一个初步尝试。限于水平,谬误难免,请惠赐教正。
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| 关 键 词： | 碳酸盐岩 层控 沉积环境 |
DEPOSITIONAL CONTROL OF SOME STRATA-BOUND URANIUM DEPOSITS IN CARBONATE ROCKS IN GUANGDONG, GUANGXI, HUNAN, GUIZHOU PROVINCES AND QINLING DISTRICT |
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| Zhuo Weirong.DEPOSITIONAL CONTROL OF SOME STRATA-BOUND URANIUM DEPOSITS IN CARBONATE ROCKS IN GUANGDONG, GUANGXI, HUNAN, GUIZHOU PROVINCES AND QINLING DISTRICT[J].Uranium Geology,1985(2). |
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| Authors: | Zhuo Weirong |
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| Institution: | Zhuo Weirong |
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| Abstract: | The depositional environments of ore-bearing beds and their showing are essential factors which control the strata-bound uranium deposits of carbonate rocks in Guangdong, Guangxi, Hunan, Guizhou provinces and Qinling district. The mineralization is located in the proximity of variation interface where the nature of sediments, the energy of sea, pH and Eh values vary with time. It also occurs spatially at the boundary between uplift and depression. The distribution of mineralized zones are in coincidence with above mentioned variational or transitional zones. It can be suggested that the transitional zones of certain sea basins at paleocontinental margin and continental surface or those among island arc and continental marginal offshore platform are the potential areas for uranium exploration. The wide platforms composed of carbonate rocks of continental surface sea are not favorable for the formation of uranium deposits of this type. |
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| Keywords: | Carbonate rocks Strata-bound Depositional environments |
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