| 赵秀德.华北地台区太古界含铁岩系中铀矿床的成矿地质条件[J].地质找矿论丛,1990,(1):46-56 |
| 华北地台区太古界含铁岩系中铀矿床的成矿地质条件 |
| GEOLOGICAL CONDITION OF U-DEPOSITS WITHIN THE IRON-BEARING ROCKS OF ARCHEAN IN THE NORTH CHINA PLATFORM |
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| DOI：10.6053/j.issn.1001-1412.1990.1. 005 |
| 中文关键词: 华北地台 太古界含铁岩系 铁铀型铀矿床 富铁矿 |
| 英文关键词: |
| 基金项目: |
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| 中文摘要: |
| 产于华北地台区太古界含铁岩系中的铀矿床,属于铁铀型铀矿床,该类型矿床在铀矿床中具有重要的意义。本文通过对某些矿床的观察和研究,查明铀矿床的产出与富铁矿在空间分布上关系密切,铀矿床的形成时间稍晚于富铁矿。据沥青铀矿测得同位素年龄为1907±35Ma。铀矿床与富铁矿床是同一地质作用的不同阶段的产物。 |
| 英文摘要: |
| U-deposits occurring in the iron-bearing rocks of Archean in the North China Platform belong to U-Fe-Type U-deposits. They are located in the iron ore deposits in stable blocks where sub-tectonic units, hydrothermal activity and green-altered rocks are developed. Mineralization is usually in the altered rock belts near to the rich iron ore bodies or in the contact zones between granitic-migmatitic gneiss and banded Fe-quartzite. Metallogeny is related to the late hydrothermal activity during regional metamorphism and super-metamorphism. Uranium is derived from the original sedimenary rocks and concentrated to form ore during the time when the sedimentary rocks were exposed to super-metamorphism. U-ore and rich iron ore are the different-staged products of one geological process.Age of the U-deposits is 1907 ± 35 Ma aproximate to the rich iron ore which is closely related to green-altered rocks. |
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