粤北下庄铀矿田辉绿岩岩石地球化学、磷灰石U-Pb年龄及其与铀成矿关系

李海东; 钟福军; 刘文泉; 潘家永; 田世洪; 曹栩; 郑国栋

doi:10.3799/dqkx.2025.089

Volume 50 Issue 11

Nov. 2025

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Article Navigation > Earth Science > 2025 > 50(11): 4405-4423

Li Haidong, Zhong Fujun, Liu Wenquan, Pan Jiayong, Tian Shihong, Cao Xu, Zheng Guodong, 2025. Petrogeochemistry, Apatite U-Pb Geochronology of Diabase, and Its Relationship with Uranium Mineralization in Xiazhuang Uranium Ore Field, North Guangdong. Earth Science, 50(11): 4405-4423. doi: 10.3799/dqkx.2025.089

Citation:

Li Haidong, Zhong Fujun, Liu Wenquan, Pan Jiayong, Tian Shihong, Cao Xu, Zheng Guodong, 2025. Petrogeochemistry, Apatite U-Pb Geochronology of Diabase, and Its Relationship with Uranium Mineralization in Xiazhuang Uranium Ore Field, North Guangdong. Earth Science, 50(11): 4405-4423. doi: 10.3799/dqkx.2025.089

Citation:

Li Haidong, Zhong Fujun, Liu Wenquan, Pan Jiayong, Tian Shihong, Cao Xu, Zheng Guodong, 2025. Petrogeochemistry, Apatite U-Pb Geochronology of Diabase, and Its Relationship with Uranium Mineralization in Xiazhuang Uranium Ore Field, North Guangdong. Earth Science, 50(11): 4405-4423. doi: 10.3799/dqkx.2025.089

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Petrogeochemistry, Apatite U-Pb Geochronology of Diabase, and Its Relationship with Uranium Mineralization in Xiazhuang Uranium Ore Field, North Guangdong

doi: 10.3799/dqkx.2025.089

1.
Shenzhen Geological Science and Technology Innovation Center (Shenzhen Geological Hazard Emergency Response Technical Center), Shenzhen 518000, China
2.
National Key Laboratory of Uranium Resources Exploration-Mining and Nuclear Remote Sensing (East China University of Technology), Nanchang 330013, China
3.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100000, China
4.
No. 290 Research Institute, CNNC, Shaoguan 512029, China

Received Date: 2023-12-27
Publish Date: 2025-11-25

Abstract

Abstract

The Xiazhuang uranium ore field in North Guangdong is characterized by five sets of approximately equidistant NWW-trending diabase dikes, which are closely related to uranium mineralization. To determine the genesis of diabase and its relationship with uranium mineralization. This study systematically investigates the diagenetic age, genesis of diabase, and its controlling mechanisms on uranium mineralization through geochemical analysis of diabase, apatite U-Pb geochronology, and H-O isotopic analysis of ore-forming quartz, combined with regional tectonic background. Results indicate that: (1) The diabase was formed during two magmatic events (200-180 Ma and 150-140 Ma), corresponding to the Early Jurassic and Late Jurassic, respectively. (2) The diabase is enriched in large-ion lithophile elements (LILEs) and highly incompatible elements. The chondrite-normalized rare earth element (REE) patterns exhibit right-leaning trends and no significant Eu or Ce anomalies, indicating an intraplate basalt affinity derived from partial mantle melting with metasomatism by subduction-related fluids. (3) The early-stage diabase (200-180 Ma) served as favorable host rocks for uranium mineralization. The deep-seated faults associated with diabase emplacement provided pathways for ore-forming fluids, and the intersections between faults and diabase facilitated the formation of vein-type uranium deposits with crust-mantle hybrid fluids. The late-stage diabase (150-140 Ma) not only inherited the role of the early-stage diabase but also contributed mantle-derived fluids and mineralizing agents (ΣCO₂) during the 138-122 Ma uranium mineralization stage, promoting the formation of fractured alteration-type uranium deposits dominated by mantle-derived fluids.
- diabase,
- petrogenesis,
- Xiazhuang uranium ore field,
- apatite U-Pb age,
- intersection uranium mineralization type,
- cataclastic altered uranium mineralization type,
- geochemistry,
- ore deposits

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References(64)

References

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Petrogeochemistry, Apatite U-Pb Geochronology of Diabase, and Its Relationship with Uranium Mineralization in Xiazhuang Uranium Ore Field, North Guangdong

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