南岭东段龙源坝铀矿化集中区构造控矿特征与找矿预测

doi:10.3799/dqkx.2026.027

南岭东段龙源坝铀矿化集中区构造控矿特征与找矿预测

doi: 10.3799/dqkx.2026.027

张涛^1,2,
章军锋^1, ,,
师志龙³,
陈志平²,
方启春²,
吕川²,
陈欣²,
党飞鹏²,
谭双²,
魏欣²

1. 中国地质大学(武汉) 地球科学学院, 湖北武汉 430074;
2. 核工业二七〇研究所, 江西南昌 330200;
3. 核工业二一六大队, 新疆乌鲁木齐 830011

基金项目:

东华理工大学核资源与环境国家重点实验室开放基金项目(2020NRE04)

中国铀业有限公司-东华理工大学核资源与环境国家重点实验室联合创新基金项目(2023NRE-LH-12)

中国核工业地质局项目(202231-4、202429-5)

核工业二七0研究所自主科研项目(270202301)联合资助

详细信息

作者简介:
张涛(1992–),男,博士研究生,高级工程师,从事铀矿地质科研及生产工作。E-mail:zhangtao270@cug.edu.cn

通讯作者:
章军锋(1977–),男,教授,主要从事壳幔岩石流变和地震成因物理机制方面的教学和科研工作。E-mail:jfzhang@cug.edu.cn

中图分类号: P581
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出版历程
- 收稿日期: 2025-09-26
- 网络出版日期: 2026-02-28

Structural Ore-Control Characteristics and Prospecting Prediction of the Longyuanba Uranium Mineralization Concentration Area in the Eastern Section of the Nanling Range

1. School of Earth Sciences, China University of Geosciences (Wuhan), Wuhan, Hubei 430074, China;
2. No. 270 Research Institute, CNNC, Nangchang, Jiangxi 330200, China;
3. Geologic Party No. 216, CNNC, Urumqi, Xinjiang 830011, China

摘要

摘要: 南岭东段龙源坝铀矿化集中区是华东南铀成矿省桃山-诸广铀成矿带的核心区段，区内花岗岩型铀矿构造控矿机制研究薄弱，前人尚未系统厘清断裂活动期次与“导矿-储矿-破矿”体系的耦合关系。本研究通过野外构造地质调查、39处含矿构造产状测量、应力场反演及同位素数据验证，揭示区内构造控矿规律。结果表明：1)区内发育近东西向、北东向、北北东向、北西向四组断裂，其中近东西向黄沙、上竹坑断裂为导矿构造（控制黄沙断陷，成矿流体汇聚区），北东向F₅-F₈断裂为铁铅锌多金属含矿构造（伴生白色块状石英脉），北西向碎裂蚀变岩/辉绿岩脉为铀矿含矿构造（优势方位282°），北北东向F₁/F₅₃/F₅₅断裂为破矿构造；2)铀成矿发生于燕山期NW-SE向伸展阶段（对应89Ma成矿年龄），与北西向张性裂隙形成时期耦合。根据控矿规律建立了“导矿构造控域-储矿构造控位-破矿构造改造”三级成矿模式，黄沙断陷内北西向构造深部成矿潜力显著。本研究为龙源坝地区铀矿找矿提供实操靶区，完善了南岭东段花岗岩型铀矿构造控矿理论。
- 构造控矿特征 /
- 找矿预测 /
- 花岗岩型铀矿 /
- 南岭东段 /
- 龙源坝铀矿化集中区
Abstract: The Longyuanba uranium mineralization concentration area in the eastern section of the Nanling Range is a core segment of the Taoshan-Zhuguang uranium metallogenic belt within the Southeastern China Uranium Province. Research on the structural ore-control mechanisms of granite-hosted uranium deposits in this area is relatively weak, and previous studies have not systematically clarified the coupling relationship between fault activity episodes and the "ore-guiding, ore-hosting, and ore-breaking" system. This study reveals the structural ore-control through field structural geological surveys, attitude measurements of 39 ore-bearing structures, stress field inversion, and isotopic data verification. The results indicate that: 1) The area develops four fault sets: nearly E-W, NE, NNE, and NW-trending. Among them, the nearly E-W trending Huangsha-Shangzhukeng Fault is an ore-guiding structure (controlling the Huangsha fault depression and serving as a convergence zone for ore-forming fluids); the NE-trending F₅-F₈ faults are ore-bearing structures for iron-lead-zinc polymetallic mineralization (associated with white massive quartz veins); the NW-trending cataclastic-altered rocks/diabase dikes are ore-bearing structures for uranium mineralization (preferred orientation 282°); and the NNE-trending F₁/F₅₃/F₅₅ faults are post-ore structures. 2) Uranium mineralization occurred during the NW-SE extensional stage of the Yanshanian period (corresponding to a mineralization age of 89 Ma), which couples with the formation period of the NW-trending tensile fractures. 3) A three-level metallogenic model of "ore-guiding structures controlling the district - ore-hosting structures controlling the deposit location - post-ore structures causing modification" is established. The NWW-trending structures within the Huangsha fault depression show significant mineralization potential at greater depths. This study provides practical target areas for uranium prospecting in the Longyuanba area and refines the structural ore-control theory for granite-hosted uranium deposits in the eastern section of the Nanling Range.