| 崔长远,张振强.干沟拗陷砂岩型铀矿成矿地质条件研究[J].矿产勘查,2021,12(6):1325-1331 |
| 干沟拗陷砂岩型铀矿成矿地质条件研究 |
| Study on metallogenic conditions of sandstone type uranium mineralization in Gangou depression |
| 投稿时间：2020-08-06 |
| DOI： |
| 中文关键词: 干沟拗陷 砂岩型 铀成矿条件 地质调查工程 找矿前景 |
| 英文关键词: Gangou depression sandstone type uranium uranium metallogenic conditions prospecting potential geological exploration engineering |
| 基金项目:本文受中国核工业地质局“河北省沽源县-内蒙古突泉县铀多金属矿资源调查评价与勘查”(202013-1)项目资助。 |
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| 中文摘要: |
| 干沟拗陷处于我国著名的青龙-兴城铀成矿带上，已发现有岭头中型(433)和干沟(434)大型铀矿床。前人多注重对矿床解剖研究，缺少对整个拗陷的成矿条件综合分析。本文在野外地质调查、室内样品分析测试基础上，对整个拗陷成矿条件进行了综合分析。结果显示，拗陷基底和盖层铀源丰富、目的层海房沟组铀背景高，岩相、古地理、古气候有利，断裂构造夹持带、围岩蚀变发育，发育一条氧化还原过渡带和酸碱过渡带，发现有明显的铀矿化富集，具有良好的成矿条件和找矿前景。 |
| 英文摘要: |
| Gangou depresssion lies to the southern margin of Jianchang Mesozoic volcanic basin and locates in China’s famous Qinglon–Xingcheng uranium metallogenic belt where Lingtou (No.433) middle-sized uranium deposit and Gangou (No.433) large-sized uranium deposit have been discovered. Previous work focus on study of uranium deposit too much and lacks the comprehensive study of whole depression’s uranium metallogenic conditions. On the base of field work and indoor sample analyses, metallogenic conditions of sandstone type uranium deposit in Gangou depression are studied comprehensively. The study shows that Gangou depression has very good metallogenic conditions and prospecting potential. There are very rich uranium sources in base and cap rocks. Target layer, Hanfanggou formation, has high uranium value and has favorable lithofacies paleogeography, paleoclimate conditions. Fault clamp belts develops in the depression and there exists a redox and acid-base transitional zone . More importantly, uranium mineralization has been found in the depression. So the depression has better prospecting future. |
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