| 论花岗岩型铀矿床热液来源——来自氧逸度条件的制约 |
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| 引用本文： | 凌洪飞.论花岗岩型铀矿床热液来源——来自氧逸度条件的制约[J].地质论评,2011,57(2):193-206. |
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| 作者姓名： | 凌洪飞 |
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| 作者单位： | 南京大学内生金属矿床成矿机制研究国家重点实验室,南京大学地球科学与工程学院,南京,210093 |
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| 基金项目： | 本文为核工业地质局“十一五”基础科研项目、内生金属矿床成矿机制研究国家重点实验室研究项目（编号2008I04）的成果。 |
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| 摘 要： | 本文根据已有的关于熔体-流体氧逸度的实验数据和理论计算结果,综述了铀在熔体中的价态及其地球化学行为,以及铀进入流体的氧逸度条件和其它条件.在此基础上,阐明了花岗岩型热液铀矿床矿-岩时差的原因,阐述了对华南花岗岩型铀矿床铀源和热液来源的新认识.地幔岩浆和花岗岩浆的氧逸度都低于磁铁矿-赤铁矿氧缓冲剂(MH)所确定的氧逸度,...
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| 关 键 词： | 氧逸度 熔体-流体系统 花岗岩 热液铀矿床 |
Origin of Hydrothermal Fluids of Granite-type Uranium Deposits:Constraints from Redox Conditions |
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| LING Hongfei.Origin of Hydrothermal Fluids of Granite-type Uranium Deposits:Constraints from Redox Conditions[J].Geological Review,2011,57(2):193-206. |
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| Authors: | LING Hongfei |
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| Institution: | LING Hongfei State Key Lab for Mineral Deposits Research,School of Earth Sciences and Engineering,Nanjing University,Nanjing,210093 |
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| Abstract: | Based on experimental data and theoretic calculation results from the literatures,this paper has summarized the valences and geochemical behaviors of uranium in melts and redox and other conditions of uranium being dissolved into fluids. Then the cause for the large difference in ages of uranium deposits and host granites,the source of uranium and the origin of hydrothermal fluids have been elucidated in this paper. The oxygen fugacity of either mantle-derived melts or granitic magma is below that of the ma... |
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