| 赣南黄沙铀矿区辉绿岩成因及其与铀成矿关系 |
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| 引用本文： | 张熠阳,钟福军,潘家永,夏菲,祁家明,李海东,刘文泉.赣南黄沙铀矿区辉绿岩成因及其与铀成矿关系[J].地球科学,2022,47(1):206-223. |
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| 作者姓名： | 张熠阳 钟福军 潘家永 夏菲 祁家明 李海东 刘文泉 |
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| 作者单位： | 1.东华理工大学核资源与环境国家重点实验室, 江西南昌 330013 |
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| 基金项目： | 国家自然科学基金项目(Nos.42002095,41772066,41862010);核资源与环境国家重点实验室自主基金项目(Nos.Z1906,2020Z08)。 |
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| 摘 要： | 赣南黄沙铀矿区内发育的辉绿岩脉与铀矿化有着密切的空间关系,但其岩石成因研究薄弱,影响了对铀成矿过程的认识.对辉绿岩进行了岩相学、主量元素、微量元素与Sr-Nd-Pb同位素分析.结果显示,辉绿岩具有贫硅、贫碱、贫镁、Na2O>K2O、较富集大离子亲石元素、轻重稀土分馏不明显(LREE/HREE=2.81～2.97)、弱E...
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| 关 键 词： | 黄沙铀矿区 地球化学 Sr-Nd-Pb同位素 辉绿岩成因 铀成矿作用 |
| 收稿时间： | 2021-05-25 |
Petrogenesis and Its Relationship with Uranium Mineralization of Diabase in Huangsha Uranium Ore-Field,South Jiangxi Province |
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| Zhang Yiyang,Zhong Fujun,Pan Jiayong,Xia Fei,Qi Jiaming,Li Haidong,Liu Wenquan.Petrogenesis and Its Relationship with Uranium Mineralization of Diabase in Huangsha Uranium Ore-Field,South Jiangxi Province[J].Earth Science-Journal of China University of Geosciences,2022,47(1):206-223. |
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| Authors: | Zhang Yiyang Zhong Fujun Pan Jiayong Xia Fei Qi Jiaming Li Haidong Liu Wenquan |
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| Affiliation: | (State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China;No.290 Research Institute,China National Nuclear Geology,Shaoguan 512026,China) |
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| Abstract: | The diabase dikes in the Huangsha U ore-field of South Jiangxi Province have close spatial relationship with U mineralization.The petrography,major element,trace element and Sr-Nd-Pb isotope analysis of diabase were carried out.The diabase is geochemically characterized by low SiO2,MgO and alkaline,Na2O>K2O,enrichment of large ion lithophile elements(Sr,K,Rb,Ba),no fractionation in LREE and HREE(LREE/HREE=2.81-2.97),weak Eu negative anomaly(δEu=0.95-0.98),typical Dupal anomaly Pb isotopic,high(87Sr/86Sr)i(0.70493-0.70658)and lowεNd(t)(3.98-4.84),suggesting that the diabase belongs to continental tholeiite series,the magmatic source was the relatively enriched mantle changed by the metasomatism fluid originated from the subduction zone of Pacific Ocean Plate, formed under the large scale lithosphere thiningtectonic background. The gaps between diagenetic ages of diabase (140 Ma) and uranium mineralization ages (100 Ma, 63-76 Ma) are significantly large. It is considered that diabase provides a favorable reductive agent for pitchblende precipitation.Comparing the diabase in the Zhuguang-Xiazhuang ore-field, there are many similarities in origin and ore-controlling rules. InHuangsha U ore-field, there are favorable geological conditions for U mineralizaiton and great metallogenetic potentiality. Theexploration for U deposit in the future should focus on the intersection type U mineralization and the intersection of NWWtrendingbasic dikes and NE-trending fracture zone. |
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| Keywords: | Huangsha uranium ore-field geochemistry Sr-Nd-Pb isotope diabase genesis uranium mineralization |
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