| 相山铀矿田钾玄质岩石与铀成矿 |
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| 引用本文： | 张树明,余达淦,吴仁贵,张丽芬.相山铀矿田钾玄质岩石与铀成矿[J].大地构造与成矿学,2005,29(4):527-536. |
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| 作者姓名： | 张树明 余达淦 吴仁贵 张丽芬 |
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| 作者单位： | 1. 中国地质大学,湖北,武汉,430074;东华理工学院核资源与环境工程技术中心,江西,抚州,344000
2. 东华理工学院核资源与环境工程技术中心,江西,抚州,344000 |
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| 基金项目： | 国家自然科学基金，核工业科学基金 |
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| 摘 要： | 岩石学、元素地球化学研究表明,相山铀矿田的英安斑岩属于板内型钾玄质岩类,为钾玄质英安斑岩。其主要地球化学特征是:SiO2含量变化小(66.73%～69.88%),高碱(K2O+Na2O=6.06%～8.41%),高K2O/Na2O比值(1.53～3.49),高Al2O3(13.24%～15.96%),强烈富集大离子亲石元素(LILE)和轻稀土元素(LREE),P、Sr、Ti显著负异常,无明显的Nb和Ta负异常,Th/Yb>5,U和Th异常偏高。相山钾玄质英安斑岩的形成是源于地幔玄武岩浆的底侵作用,其中较基性的包体应为地幔岩浆残留产物。相山铀矿化在时空上与钾玄质英安斑岩关系密切,其形成应该与钾玄质岩有关,幔源流体在铀成矿过程中扮演了重要角色。
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| 关 键 词： | 钾玄质岩 铀成矿 幔源流体 相山铀矿田 |
| 文章编号： | 1001-1552(2005)04-0527-10 |
| 收稿时间： | 2005-01-17 |
| 修稿时间： | 2005-03-18 |
SHOSHONITIC ROCK AND URANIUM MINERALIZATION IN XIANGSHAN URANIUM ORE -FIELD IN JIANGXI |
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| ZHANG Shuming,YU Dagan,WU Rengui,ZHANG Lifen.SHOSHONITIC ROCK AND URANIUM MINERALIZATION IN XIANGSHAN URANIUM ORE -FIELD IN JIANGXI[J].Geotectonica et Metallogenia,2005,29(4):527-536. |
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| Authors: | ZHANG Shuming YU Dagan WU Rengui ZHANG Lifen |
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| Institution: | 1. China University of Geoscience, Wuhan, Hubei 430074, China; 2. Nuclear Resources and Environmental Engineering Center, East China Institute of Technology, Fuzhou, JX 344000, China |
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| Abstract: | Studies of petrology and elemental geochemistry indicate that the Xiangshan uranium ore-field dacite porphyry belongs to intra-plate shoshonitic rock type and is a kind of shoshonitic dacite porphyry. The main geochemical characters of the shoshonitic dacite include: SiO2=66.73%~69.88%; high alkali (K2O+Na2O= 6.06%~8.41%); high K2O/Na2O ratio (1.53~3.49); high Al2O3 (13.24%~15.96%); being intensively enriched in LILE and LREE; remarkable P, Sr and Ti negative abnomalies; weak Nb and Ta negative abnomalies; Th/Yb>5; high U and Th content. Xiangshan shoshonitic dacite porphyry was originated from mantle basaltic magma underplated. The enclave in shoshonitic dacite porphyry was the atexite of mantle-derived magma. Xiangshan uranium mineralization was related to the shoshonitic dacite porphyry in both time and space, and the uranium deposit should be related to the shoshonitic dacite. Mantle-derived fluids had played an important role in uranium mineralization. |
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| Keywords: | shoshonitic rocks uranium mineralization mantle -derived fluids Xiangshan uranium ore -field |
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