| 相山铀矿田磷灰石与富矿形成的关系 |
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| 引用本文： | 温志坚,杜乐天,刘正义.相山铀矿田磷灰石与富矿形成的关系[J].铀矿地质,1999,15(4):217-224. |
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| 作者姓名： | 温志坚 杜乐天 刘正义 |
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| 作者单位： | 核工业北京地质研究院,北京,100029 |
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| 摘 要： | 本文系统研究了相山火山热液型铀矿田磷灰石与富铀矿床形成之间的关系。研究表明：该区富矿石中铀含量与五氧化二磷含量呈正相关关系；电子探针揭示富铀矿体中铀矿物周围有大量磷灰石存在，磷灰石在富铀矿石中以两种形式产出：一种是结晶自纯的晶体磷灰石；另一种是胶体磷灰石，后者与铀矿化关系密切。笔者在调研了磷、铀地球化学性质相似性及磷灰石沉淀的物理化学条件的基础上提出：胶体共沉淀是导致本区富铀矿形成的主要原因。
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| 关 键 词： | 相山火山热液型铀矿田 磷灰石 富铀矿 胶体共沉淀 |
RELATION BETWEEN FRANCOLITE AND METALLOGENESIS OF HIGH GRADE URANIUM ORES IN XIANGSHAN URANIUM OREFIELD |
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| Wen Zhijian,DU Letian,Liu Zhengyi.RELATION BETWEEN FRANCOLITE AND METALLOGENESIS OF HIGH GRADE URANIUM ORES IN XIANGSHAN URANIUM OREFIELD[J].Uranium Geology,1999,15(4):217-224. |
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| Authors: | Wen Zhijian DU Letian Liu Zhengyi |
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| Abstract: | Xiangshan uranium orefield located in Jiangxi province, south of China, is the largest volcanogenic hydrothermal uranium orefield in China. More than twenty uranium deposits occur in the field. The uranium exploration and mining in the Xiangshan uranium orefield were accompanied by extensive and comprehensive research on ore mineralogy and a number of research papers were published. However, most of previous research presented only a little information about high grade uranium ore. On the basis of systematic field observation and sample analysis, this paper expounds the metallogenesis of high grade uranium ore in Xiangshan volcanic basin. A number of electronic probe tests indicate that francolite extensively coexists with uranium minerals. Chemical analyses also show that uranium content is positively correlated to P 2O 5. Further study reveals that uranium and phosphorus have similar geochemical behaviors in hydrothermal process, both can be removed and precipitated together. The precipitation of francolite in large quantity is essential to high grade uranium metallogenesis. Finally, the authors propose that the mechanism of metallogenesis for high grade uranium ores is colloidal coprecipitation of francolite and uranium minerals. |
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| Keywords: | Xiangshan volcanogenic hydrothermal uranium orefield Francolite High grade uranium ore Colloidal coprecipitation |
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