| 刘凯鹏,王晓鹏,武正乾,刘坤鹏,冯博.鄂尔多斯盆地南部宁县地区构造与铀矿化的关系[J].矿产勘查,2025,16(S2):44-48 |
| 鄂尔多斯盆地南部宁县地区构造与铀矿化的关系 |
| The relationship between structure and uranium mineralization in Ningxian area，southern Ordos Basin |
| 投稿时间：2025-11-25 |
| DOI：10.20008/j.kckc.2025s2007 |
| 中文关键词: 鄂尔多斯盆地 宁县地区 直罗组 构造特征 铀矿化 |
| 英文关键词: Ordos Basin Ningxian area Zhiluo Formation structural characteristics uranium mineralization |
| 基金项目:本文受中国核工业地勘基金项目“鄂尔多斯盆地南部旬邑－盐池地区铀矿资源调查评价与勘查”(2022-17)和“甘肃省镇原县新庄地区铀矿普查”(202417-1)联合资助。 |
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| 中文摘要: |
| 铀矿化的形成与富集受构造条件的控制作用显著。本文基于铀矿勘查工作，对宁县地区构造与铀矿化关 系进行研究，结果显示直罗组沉积厚度较大或直罗组上段地层缺失的区域是层间氧化带发育的优势地 段；含氧水沿直罗组上段“构造天窗 ”向两侧渗流迁移，在灰绿色与灰色砂岩的岩性界面处发生铀元素沉 淀，形成铀矿化。区内背斜构造两翼不仅是氧化改造作用的强烈发育部位，更是铀元素富集的有利成矿 空间，可作为下一步铀矿勘查的重点靶区。 |
| 英文摘要: |
| The formation and enrichment of uranium mineralization are significantly controlled by structural conditions. Based on uranium exploration work，this study investigates the relationship between structure and uranium mineralization in the Ningxian area. The results indicate that areas with a relatively large sedimentarythickness of the Zhiluo Formation or missing upper member of the Zhiluo Formation are favorable zones for thedevelopment of interlayer oxidation zones. Oxygenated water seeps and migrates to both sides along the "structuralwindows" in the upper member of the Zhiluo Formation，and uranium precipitation occurs at the lithological interface between grayish-green and gray sandstones，thereby forming uranium mineralization. The two wings of theanticline structures in the area are not only the sites where oxidation transformation is strongly developed，but also favorable metallogenic spaces for uranium enrichment，which can be used as key targets for further uranium exploration. |
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