| 四川盆地东北部砂岩型铀矿石及铀的存在形式特征研究 |
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| 引用本文： | 安然,焦志鹏,辛存林.四川盆地东北部砂岩型铀矿石及铀的存在形式特征研究[J].矿产与地质,2021(1):90-95. |
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| 作者姓名： | 安然 焦志鹏 辛存林 |
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| 作者单位： | 甘肃省核工业地质局212大队;西北师范大学地理与环境科学学院 |
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| 基金项目： | 甘肃省科技支撑基金项目(编号1104FKCA116)资助。 |
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| 摘 要： | 四川盆地东北部砂岩型铀矿含铀层位为下白垩统苍溪组,主要矿化产在苍溪组第一韵律层下部砂岩或砾岩层中。岩矿鉴定表明,主要含矿岩性为细—中粒砂岩,砂岩矿物碎屑主要为石英,胶结物主要为方解石,含少量黄铁矿。扫描电镜和电子探针分析表明,含矿岩石中除了矿物碎屑石英、胶结物方解石和黄铁矿外,还含有钛铁矿、方铅矿和铀石。铀石为岩石中铀的主要存在形式,少量铀以沥青铀矿形式存在。
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| 关 键 词： | 砂岩型铀矿 含铀岩石 铀矿物 四川盆地 |
Study on the existing form characteristics of uranium in sandstone-type uranium ore in northeastern Sichuan Basin |
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| AN Ran,JIAO Zhipeng,XIN Cunlin.Study on the existing form characteristics of uranium in sandstone-type uranium ore in northeastern Sichuan Basin[J].Mineral Resources and Geology,2021(1):90-95. |
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| Authors: | AN Ran JIAO Zhipeng XIN Cunlin |
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| Institution: | (Geological Team No.212,Gansu Nucleus Industrial Geology Bureau,Wuwei 733040,Gansu,China;College of Geography and Environmental Science,Northwest Normal University,Lanzhou 730070,Gansu,China) |
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| Abstract: | The uranium-bearing horizon of sandstone-type uranium deposits in the northeastern part of the Sichuan Basin is the Lower Cretaceous Cangxi Formation,and the main mineralization is in the sandstone or conglomerate under the first rhythm layer of the Cangxi Formation.Rock and mineral identification shows that the main ore-bearing lithology is fine-medium-grained sandstone,sandstone mineral fragments are mainly quartz,and the cement is mainly calcite with a small amount of pyrite.Scanning electron microscopy and electron probe analysis showed that in addition to mineral detrital quartz,cement calcite and pyrite,ilmenite,galena and uranium are also contained in ore-bearing rocks.Uranium is the main form of uranium in rocks,and a small amount of uranium exists in the form of bituminous uranium. |
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| Keywords: | sandstone-type uranium deposit uranium-bearing rock uranium mineral Sichuan Basin |
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