安徽石台地区碳硅泥岩型铀矿目标层伽马能谱异常特征及其与铀成矿关系

    Anomaly characteristics in gamma-ray spectra and their relationship with uranium mineralization for target layers in carbonaceous-siliceous-argillaceous rock-hosted uranium deposits in Shitai area, Anhui Province, China

    • 摘要: 安徽石台地区位于修水—宁国碳硅泥岩型铀成矿带的东段,该区断裂构造活动频繁,铀成矿潜力较大。为探讨皖南石台地区的铀成矿前景,本文在该区开展了1∶5万比例尺的地面伽马能谱测量,采用传统统计法和铀差量分析法提取铀成矿信息,并分析了区内放射性元素的分布特征。通过能谱—地质剖面研究了荷塘组4个层段的放射性异常特征,发现其中第一段的铀含量最高。结合野外地质调查和显微岩石学分析,进一步研究了该层的地质特征及其与铀成矿的潜在关系。结果表明,荷塘组地层是区内的主要铀源层,而荷塘组一段则为主要的含矿层,富含大量有机质、黏土矿物、黄铁矿等成矿物质,有利于铀的富集。对目标层的深入研究为后续该地区同类型铀矿的勘查提供了技术指导。

       

      Abstract: The Shitai area in southern Anhui Province, China is located in the eastern part of the Xiushui-Ningguo carbonaceous-siliceous-argillaceous rock-hosted uranium metallogenic belt. The frequent activity of fault structures in this area contributes to great uranium mineralization potential. To explore the uranium resource potential in the Shitai area, this study conducted 1∶50 000 ground-based gamma-ray spectrometry. Accordingly, this study extracted metallogenic information using traditional statistical methods and difference analysis of uranium content, followed by the analysis of the distribution characteristics of radioactive elements. Then, this study analyzed the radioactive anomalies in the four members of the Hetang Formation based on the spectra and geological profiles. The analytical results revealed that the highest uranium content occurs in the first member of the Hetang Formation. By combining field geological surveys and microscopic petrographic analyses, this study further investigated the geological characteristics of the first member, as well as their potential relationships with uranium mineralization. The results indicate that the Hetang Formation serves as the primary uranium source in the Shitai area, with its first member identified as the main ore-bearing layer. This member is rich in ore-forming materials including organic matter, clay minerals, and pyrite, creating favorable conditions for uranium enrichment. The in-depth research on the target layer will provide technical guidance for exploring the same type of uranium deposits in this area.

       

    /

    返回文章
    返回