铀矿地质2025，Vol.41Issue(6)：956-971,16.DOI:10.3969/j.issn.1000-0658.2025.41.067
下庄铀矿田竹筒尖矿床与希望矿床对比研究
Comparison on Zhujiantong and Xiwang Deposits of Xiazhuang Uranium Ore Field in Northern Guangdong:Evidence from Uranium Minerals and In-situ Trace Elements of Quartz
摘要
Abstract
Xiazhuang uranium ore field is one of the earliest granite-type uranium deposits discovered in my country,and has achieved fruitful research results,but there are few mineralogical comparative studies on ores between different deposits.This paper uses LA-ICP-MS and EPMA in-situ analysis techniques to carry out U-Th-Pb chemical dating of uranium minerals,in-situ trace element analysis of uranium minerals and quartz in Xiwang deposit and Zhutongjian deposit from Xiazhuang uranium ore field,and explores its uranium mineralization age,ore-forming fluid properties and mineralization.The uranium minerals of Zhutongjian deposit are relatively enriched in REE,Th,Nb,and Ta compared with the uranium minerals of the Xiwang deposit,while the latter is enriched in W.Quartz of the two deposits is rich in Al,and quartz of the Xiwang deposit is significantly low in Ti and high in Li,Na,K,and Rb.U-Th-Pb chemical dating of uranium minerals shows that mineralization age of Xiwang deposit is 54.7 Ma±2.8 Ma,which is the product of the late uranium mineralization of Xiazhuang uranium ore field,and mineralization age of Zhutongjian deposit is 121.4 Ma±3.4 Ma,which is the product of early uranium mineralization of Xiazhuang uranium ore field.In-situ trace characteristics of uranium minerals and quartz indicate that quartz in Xiwang deposit and Zhutongjian deposit are both hydrothermal in origin,with the former formed in a relatively more acidic medium-low temperature hydrothermal environment and the latter in a relatively higher temperature hydrothermal environment.Comprehensive analysis shows that ore-forming materials of Xiwang deposit are mainly derived from the ore-bearing Xiazhuang pluton,while the ore-forming materials of Zhutongjian deposit are mainly derived from the ore-bearing Baishuizhai intrusion,and their formation is related to the extension and tension of the regional lithosphere.关键词
铀矿物/石英/成矿流体/成矿过程/下庄铀矿田Key words
uranium mineral/quartz/ore-forming fluid/ore-forming process/Xiazhuang uranium ore field分类
地质学引用本文复制引用
曹栩,钟福军,牛佰强,李海东,孙俊杰,夏菲,潘家永..下庄铀矿田竹筒尖矿床与希望矿床对比研究[J].铀矿地质,2025,41(6):956-971,16.基金项目
国家自然科学基金项目(编号:42362011、42272090) （编号:42362011、42272090）
铀资源探采与核遥感全国重点实验室基金项目(NKLUR-WDZC-2025-02) （NKLUR-WDZC-2025-02）
核能开发项目(编号:2301-2-5) （编号:2301-2-5）
中国核工业地质局地勘费项目(编号:202439-2、202439-6) （编号:202439-2、202439-6）
东华理工大学核地学部"揭榜挂帅"项目(2024HDX02)联合资助. （2024HDX02）
