金川矿床3号矿体成矿过程及对成矿模式的启示

王亚磊; 李文渊; 王永才; 张照伟; 艾启兴; 黑欢

doi:10.3799/dqkx.2025.299

Volume 51 Issue 1

Jan. 2026

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Article Navigation > Earth Science > 2026 > 51(1): 240-256

Wang Yalei, Li Wenyuan, Wang Yongcai, Zhang Zhaowei, Ai Qixing, Hei Huan, 2026. Mineralization Process of No.3 Orebody of Jinchuan Deposit and New Implication for Metallogenic Model. Earth Science, 51(1): 240-256. doi: 10.3799/dqkx.2025.299

Citation:

Wang Yalei, Li Wenyuan, Wang Yongcai, Zhang Zhaowei, Ai Qixing, Hei Huan, 2026. Mineralization Process of No.3 Orebody of Jinchuan Deposit and New Implication for Metallogenic Model. Earth Science, 51(1): 240-256. doi: 10.3799/dqkx.2025.299

Citation:

Wang Yalei, Li Wenyuan, Wang Yongcai, Zhang Zhaowei, Ai Qixing, Hei Huan, 2026. Mineralization Process of No.3 Orebody of Jinchuan Deposit and New Implication for Metallogenic Model. Earth Science, 51(1): 240-256. doi: 10.3799/dqkx.2025.299

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Mineralization Process of No.3 Orebody of Jinchuan Deposit and New Implication for Metallogenic Model

doi: 10.3799/dqkx.2025.299

1.
Chinese Academy of Geological Sciences, Beijing 100037, China
2.
MNR Key Laboratory for the Study of Focused Magmatism and Giant Ore Deposits, Xi'an Center of China Geological Survey, Xi'an 710119, China
3.
Jinchuan Group Co. Ltd., Jinchang 737100, China

Received Date: 2025-08-06
Publish Date: 2026-01-25

Abstract

Abstract

To elucidate the mineralization process of the No.3 orebody of the Jinchuan deposit and to refine the Jinchuan metallogenic model, it conducted EPMA of ore minerals together with whole-rock major-trace element and Ni-Cu-PGE analyses. Olivine from the fine-grained and pegmatitic lherzolite hosting the No.3 orebody shows Fo values of 82.4%-85.0% and Ni contents of 1 069×10^-6-2 420×10^-6. Both Fo and olivine Ni content increase progressively from the northwest to the southeast. Major-element variations suggest that the No.3 orebody experienced dominantly olivine- and pyroxene-controlled fractional crystallization. The ore-bearing rocks are slightly enriched in light rare earth elements (LREE), markedly enriched in large-ion lithophile elements (LILE), and depleted in high-field-strength elements (HFSE). The total PGE abundances of the No.3 orebody are comparable to those of the No.24 orebody, but are significantly higher than those of the No.1 and No.2 orebodies. Importantly, the southeastern segment of the No.3 orebody remains relatively more mafic and therefore retains greater mineralization potential. These observations support a metallogenic model in which the Jinchuan deposit formed through "mantle-derived magma, sulfide segregation, and multi-center emplacement of mineralized magma". The No.3 and No.24 orebodies were supplied by the same magma conduit, whereas the No. 1 and No. 2 orebodies were fed by separate conduits.

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Mineralization Process of No.3 Orebody of Jinchuan Deposit and New Implication for Metallogenic Model

doi: 10.3799/dqkx.2025.299

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