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Article

Ore Genesis of the Sansheng W-Mo Deposit, Inner Mongolia, NE China: Constraints from Mineral Geochemistry and In Situ S Isotope Analyses of Sulfides

by
Wei Xie
1,2,3,
Chao Jin
1,3,*,
Qingdong Zeng
4,
Ruiliang Wang
5,
Jinjian Wu
5,
Rui Dong
1,3 and
Zhao Wang
1
1
School of Earth Science and Engineering, Hebei University of Engineering, Handan 056038, China
2
Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring (Ministry of Education), School of Geosciences and Info-Physics, Central South University, Changsha 410083, China
3
Key Laboratory of Resource Exploration Research of Hebei Province, Handan 056038, China
4
State Key Laboratory of Lithospheric and Environmental Coevolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
5
China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, Beijing 100083, China
*
Author to whom correspondence should be addressed.
Minerals 2025, 15(12), 1283; https://doi.org/10.3390/min15121283
Submission received: 30 October 2025 / Revised: 29 November 2025 / Accepted: 4 December 2025 / Published: 6 December 2025
(This article belongs to the Special Issue Selected Papers from the 7th National Youth Geological Congress)
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Abstract

Sulfide geochemistry has been widely employed to constrain formation processes in various deposit types; however, its use in porphyry W-Mo metallogenic systems is still relatively scarce. The Sansheng porphyry W-Mo deposit (Mo 24,361 t @ 0.226% and WO3 17,285 t @ 0.569%), situated in eastern Inner Mongolia, northeastern China, features with quartz vein and veinlet-disseminated W-Mo orebodies primarily localized within the cupolas of an Early Cretaceous granitic intrusion. This contribution provides a comprehensive analysis of the deposit’s geology, in situ sulfur isotopic signatures, and geochemical characteristics of wolframite and sulfides to decipher the formation of the Sansheng deposit. A narrow δ34S range (2.15‰–7.14‰) for sulfides, consistent Y/Ho (5.09–6.23) and Nb/Ta (7.20–19.96) ratios in wolframite, and pyrite Co/Ni (1–10) and As/Ni (>10) ratios collectively point to a shared source—the highly fractionated Sansheng granitic magma. Wolframite, pyrite, arsenopyrite, and chalcopyrite all host significant trace elements, though their enrichment patterns differ considerably among these minerals. Temporal variations in trace element concentrations in wolframite and sulfides reveal a decline in fluid temperature and oxygen fugacity from early to late stages. Greisenization is associated with tungsten mineralization, whereas sericitization facilitates Stage III sulfide precipitation.
Keywords: sulfide in-situ trace elements; wolframite geochemistry; in-situ sulfur isotope; Sansheng W-Mo deposit; NE China sulfide in-situ trace elements; wolframite geochemistry; in-situ sulfur isotope; Sansheng W-Mo deposit; NE China

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MDPI and ACS Style

Xie, W.; Jin, C.; Zeng, Q.; Wang, R.; Wu, J.; Dong, R.; Wang, Z. Ore Genesis of the Sansheng W-Mo Deposit, Inner Mongolia, NE China: Constraints from Mineral Geochemistry and In Situ S Isotope Analyses of Sulfides. Minerals 2025, 15, 1283. https://doi.org/10.3390/min15121283

AMA Style

Xie W, Jin C, Zeng Q, Wang R, Wu J, Dong R, Wang Z. Ore Genesis of the Sansheng W-Mo Deposit, Inner Mongolia, NE China: Constraints from Mineral Geochemistry and In Situ S Isotope Analyses of Sulfides. Minerals. 2025; 15(12):1283. https://doi.org/10.3390/min15121283

Chicago/Turabian Style

Xie, Wei, Chao Jin, Qingdong Zeng, Ruiliang Wang, Jinjian Wu, Rui Dong, and Zhao Wang. 2025. "Ore Genesis of the Sansheng W-Mo Deposit, Inner Mongolia, NE China: Constraints from Mineral Geochemistry and In Situ S Isotope Analyses of Sulfides" Minerals 15, no. 12: 1283. https://doi.org/10.3390/min15121283

APA Style

Xie, W., Jin, C., Zeng, Q., Wang, R., Wu, J., Dong, R., & Wang, Z. (2025). Ore Genesis of the Sansheng W-Mo Deposit, Inner Mongolia, NE China: Constraints from Mineral Geochemistry and In Situ S Isotope Analyses of Sulfides. Minerals, 15(12), 1283. https://doi.org/10.3390/min15121283

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