惠安堡地区铀矿中铀的存在形式及共生矿物组合特征

Uranium Occurrence and Mineral Assemblage Characteristics of Uranium Deposit in Huianbu Area

通过对惠安堡地区的铀矿石进行放射性径迹照相及显微研究,认为其铀的赋存形式以吸附态为主,少量为铀矿物。铁钛氧化物中多见疏密不一的α径迹,少量含有细小的沥青铀矿,认为铁钛氧化物为铀的重要富集剂。矿石的电子显微镜研究表明,富矿石中存在8种矿物组合。矿石的全岩铀铅同位素年龄测定表明,其成矿时代为新近纪中新世晚期,说明成矿作用与喜山运动的区域抬升有关。

Study of Microphoto of α‐tracks and microscopic examination of ores in uranium deposit in Huianbu shew that the occurrence of uranium is mainly adsorbed by the Fe‐Ti oxide which was considered as significant adsorbent ,because the alpha track mostly occurred as different density ,and a small amount of uranium as uraninite.Microscopic study of the ores fond 8 kinds uranium mineral combi‐nation and the U‐Pb isotopic age of rocks suggest that the metallogenic epoch in Huianbu area is Late Mio‐cene epoch ,which means the regional uplifting by Himalayan orogeny was related to uranium metallization.