下庄矿田花岗岩外接触带型铀矿化特征及找矿标志  

Characteristics and Prospecting Criteria of Outer Contact Zone Granite Type Uranium Mineralization in Xiazhuang Ore Field

作　　者：汪清浩 胡鹏 王家跃 李海东 郑国栋 WANG Qinghao;HU Peng;WANG Jiayue;LI Haidong;ZHENG Guodong(Research Institute No.290,CNNC,Shaoguan,Guangdong 512029,China)

机构地区：[1]核工业二九〇研究所,广东韶关512029

出　　处：《铀矿地质》2024年第4期708-717,共10页Uranium Geology

基　　金：中国核工业地质局地质勘查项目(编号:202239)资助。

摘　　要：外接触带型铀矿床是花岗岩型铀矿床的一种重要类型,文章通过研究下庄矿田东部地区外接触带的地质、物探特征并结合区内铀矿勘查成果,归纳总结了下庄矿田花岗岩外接触带型铀矿化特征及控矿因素,提出下庄矿田花岗岩外接触带型铀矿化严格受“岩性界面、构造、热液蚀变”三位一体控制,而花岗岩体与寒武纪地层的接触界面、强烈的构造运动、叠加发育的多种热液蚀变以及放射性异常点带是主要的找矿标志,同时文章研究认为竹园头地区具有与新桥东、坪田矿床相似的成矿地质条件和铀矿化特征,并在找矿标志集中部位通过钻探揭露获取了很好的工业铀矿化,表明竹园头地区是进一步铀矿勘查的重点区域。Outer contact zone granite type uranium deposit is an important type of granite uranium deposit.By studying the geological and geophysical characteristics of the outer contact zone in the eastern area of Xiazhuang ore field,the characteristics and ore-controlling factors of outer contact zone granite type uranium mineralization in Xiazhuang ore field were summarized based on the uranium exploration results in the area.It was suggested that the uranium mineralization in the outer contact zone of granite in Xiazhuang ore field was strictly controlled by"lithologic interface,structure and hydrothermal alteration",and the contact interface between granite and Cambrian strata,strong structural zone,superimposed hydrothermal alteration and radioactive anomaly zone are the main prospecting signs.At the same time,it was considered that the Zhuyuantou area has similar metallogenic conditions and uranium mineralization characteristics to Xinqiaodong and Pingtian deposits,and highly profitable uranium mineralization has been discovered by the drilling in the concentrated areas of prospecting indicators,indicating that Zhuyuantou area is a key area for further uranium exploration.

关 键 词：外接触带 构造 热液蚀变 放射性异常 找矿标志 

分 类 号：P619.14[天文地球—矿床学]