西藏工布江达县隆桑斑岩型铜钼矿床成岩-成矿时代及成矿潜力

吴昌益; 郎兴海; 邓煜霖; 詹宏宇; 王旭辉; 李宸; 郑洪山; 高焕丽; 何青; 冯德新; 郭柏卿

doi:10.3799/dqkx.2025.155

Volume 50 Issue 11

Nov. 2025

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Article Navigation > Earth Science > 2025 > 50(11): 4337-4354

Wu Changyi, Lang Xinghai, Deng Yulin, Zhan Hongyu, Wang Xuhui, Li Chen, Zheng Hongshan, Gao Huanli, He Qing, Feng Dexin, Guo Baiqing, 2025. Diagenetic-Metallogenic Age and Mineralization Potential of Longsang Porphyry Cu-Mo Deposit, Gongbu Jiangda County, Xizang. Earth Science, 50(11): 4337-4354. doi: 10.3799/dqkx.2025.155

Citation:

Wu Changyi, Lang Xinghai, Deng Yulin, Zhan Hongyu, Wang Xuhui, Li Chen, Zheng Hongshan, Gao Huanli, He Qing, Feng Dexin, Guo Baiqing, 2025. Diagenetic-Metallogenic Age and Mineralization Potential of Longsang Porphyry Cu-Mo Deposit, Gongbu Jiangda County, Xizang. Earth Science, 50(11): 4337-4354. doi: 10.3799/dqkx.2025.155

Citation:

Wu Changyi, Lang Xinghai, Deng Yulin, Zhan Hongyu, Wang Xuhui, Li Chen, Zheng Hongshan, Gao Huanli, He Qing, Feng Dexin, Guo Baiqing, 2025. Diagenetic-Metallogenic Age and Mineralization Potential of Longsang Porphyry Cu-Mo Deposit, Gongbu Jiangda County, Xizang. Earth Science, 50(11): 4337-4354. doi: 10.3799/dqkx.2025.155

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Diagenetic-Metallogenic Age and Mineralization Potential of Longsang Porphyry Cu-Mo Deposit, Gongbu Jiangda County, Xizang

doi: 10.3799/dqkx.2025.155

1.
College of Earth and Planetary Sciences, Chengdu University of Technology, Chengdu 610059, China
2.
College of Energy, Chengdu University of Technology, Chengdu 610059, China
3.
Xizang Ocean Mineral Exploration Co., Ltd., Lhasa 850000, China
4.
Xizang Huaguan Mining Co., Ltd., Lhasa 850000, China

Received Date: 2025-05-25
Publish Date: 2025-11-25

Abstract

Abstract

The Longsang deposit is a porphyry copper-molybdenum mining area where mineral exploration is currently underway in the eastern section of the Gangdese metallogenic belt. To further constrain the magmatic-mineralization age and evaluate the metallogenic potential of the ore-bearing intrusions, detailed field geological surveys, and drill core logging were conducted, and zircon U-Pb dating and trace element analysis were performed on the mineralized rock bodies of biotite granodiorite and biotite monzogranite porphyry, with Re-Os dating of molybdenite veins in this study. The results indicate that the ore-bearing intrusions in the Longsang deposit are of crystallization ages of (21.80±0.29) Ma and (21.68±0.23) Ma, while the molybdenite mineralization age is (19.1±0.6) Ma. Additionally, zircon trace elements exhibit high Ce/Nd, (Ce/Nd)/Y, and low Dy/Yb ratios, along with negative Eu anomalies and positive Ce anomalies, indicating that the magma had high oxygen fugacity and water content, which facilitated the enrichment and transport of ore-forming elements such as Cu and Mo. In conclusion, the Longsang deposit underwent diagenetic mineralization during the Miocene epoch, demonstrating significant mineralization potential. These findings provide valuable insights into the spatiotemporal distribution patterns of deposits in the eastern Gangdese belt, contributing to a deeper understanding of regional metallogeny.
- Gangdese,
- porphyry copper molybdenum deposits,
- Longsang deposit,
- diagenetic and metallogenic age,
- metallogenic potential,
- ore deposits,
- geochemistry

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References(51)

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