赣西北城门山铜多金属矿床矽卡岩的形成时代、物理化学条件及演化过程

钟浩; 徐耀明; 肖炬炜; 孔凡斌

doi:10.3799/dqkx.2023.203

Volume 50 Issue 2

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Zhong Hao, Xu Yaoming, Xiao Juwei, Kong Fanbin, 2025. Geochronology and Physical-Chemical Conditions of Skarns in Chengmenshan Cu Deposit, Northwestern of Jiangxi Province, Eastern China. Earth Science, 50(2): 596-608. doi: 10.3799/dqkx.2023.203

Citation:

Zhong Hao, Xu Yaoming, Xiao Juwei, Kong Fanbin, 2025. Geochronology and Physical-Chemical Conditions of Skarns in Chengmenshan Cu Deposit, Northwestern of Jiangxi Province, Eastern China. Earth Science, 50(2): 596-608. doi: 10.3799/dqkx.2023.203

Citation:

Zhong Hao, Xu Yaoming, Xiao Juwei, Kong Fanbin, 2025. Geochronology and Physical-Chemical Conditions of Skarns in Chengmenshan Cu Deposit, Northwestern of Jiangxi Province, Eastern China. Earth Science, 50(2): 596-608. doi: 10.3799/dqkx.2023.203

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Geochronology and Physical-Chemical Conditions of Skarns in Chengmenshan Cu Deposit, Northwestern of Jiangxi Province, Eastern China

doi: 10.3799/dqkx.2023.203

Zhong Hao^{1
,
,},
Xu Yaoming^{2
,
,
,},
Xiao Juwei²,
Kong Fanbin^{1, 2}

1.
The Second Geological Brigade, Jiangxi Geological Bureau, Jiujiang 332000, China
2.
School of Earth Resources, China University of Geosciences, Wuhan 430074, China

Received Date: 2023-11-23
Available Online: 2025-02-26
Publish Date: 2025-02-25

Abstract

Abstract

In the purpose of understanding formation time and physical-chemical conditions of skarn in Chengmenshan Cu deposit of northwestern Jiangxi Province, we use garnet to do U-Pb isotopic dating, EPMA major elements analyze and LA-ICPMS trace elements analyze, combined with TIMA automated mineral analyze, the skarn forming age of 146.2±1.1 Ma is acquired, and the mineral composition is mainly garnet (Andradite with And value average 95%), LREE elements are enriched and HREE elements are depleted, and Eu show obviously positive anomalies. Therefore we conclude that Chengmenshan Cu deposit own two times of skarn forming respectively corresponding to the formation of granodiorite porphyry and quartz porphyry. Strong oxidized, acidic, high salinity and advective metasomatism conditions are the environment of skarn forming, and magmatic fluids is the major source of these skarns. The physical-chemical conditions like fO₂, pH, Cl^- concentration varied systematically with the change of W/R ratio during the formation process of Chengmenshan skarns.
- Middle-Lower Yangtze River Metallogenic Belt,
- Chengmenshan,
- skarn,
- geochronology,
- physical-chemical conditions,
- geochemistry

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References(63)

References

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Geochronology and Physical-Chemical Conditions of Skarns in Chengmenshan Cu Deposit, Northwestern of Jiangxi Province, Eastern China

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