| Reference Type | Journal (article/letter/editorial) |
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| Title | Fluid evolution and ore precipitation of the Shanhu quartz-vein type W-Sn deposit in South China: constraints from fluid inclusions and oxygen isotopes |
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| Journal | Ore Geology Reviews |
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| Authors | Cheng, Kai-De | Author |
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| Zhao, Kui-Dong | Author |
| Zhao, He-Dong | Author |
| Xu, Cong | Author |
| Jiang, Shao-Yong | Author |
| Year | 2026 | Volume | < 192 > |
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| Page(s) | 107223 |
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| URL | |
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| DOI | doi:10.1016/j.oregeorev.2026.107223Search in ResearchGate |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 19770670 | Long-form Identifier | mindat:1:5:19770670:3 |
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| GUID | 0 |
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| Full Reference | Cheng, Kai-De; Zhao, Kui-Dong; Zhao, He-Dong; Xu, Cong; Jiang, Shao-Yong (2026) Fluid evolution and ore precipitation of the Shanhu quartz-vein type W-Sn deposit in South China: constraints from fluid inclusions and oxygen isotopes. Ore Geology Reviews, 192. 107223 doi:10.1016/j.oregeorev.2026.107223 |
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| Plain Text | Cheng, Kai-De; Zhao, Kui-Dong; Zhao, He-Dong; Xu, Cong; Jiang, Shao-Yong (2026) Fluid evolution and ore precipitation of the Shanhu quartz-vein type W-Sn deposit in South China: constraints from fluid inclusions and oxygen isotopes. Ore Geology Reviews, 192. 107223 doi:10.1016/j.oregeorev.2026.107223 |
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| In | Link this record to the correct parent record (if possible) |
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| Abstract/Notes | The Shanhu W-Sn deposit, a super-large quartz-vein type deposit within the Nanling Range of South China, exhibits a distinct mineralization age (∼100 Ma) compared to other deposits in the region. Despite its significance, the ore-forming mechanism remains poorly constrained. To elucidate the origin and evolution of ore-forming fluids and the precipitation mechanisms of W and Sn, we conducted a comprehensive study of fluid inclusions and oxygen isotopic compositions in cassiterite and wolframite. Based on vein types and mineral assemblages, W-Sn mineralization in the deposit can be divided into three stages: the muscovite-cassiterite stage (Stage I), the quartz-wolframite-sulfide stage (Stage II), and the calcite-scheelite stage (Stage III). Stage I is characterized by fluid inclusions in cassiterite (216-324°C, 6.2–7.8 wt% NaCleq) and quartz (175-291°C, 3.1–12.4 wt% NaCleq), with associated fluorite showing lower temperature-salinity ranges (177-215°C, 2.9–7.9 wt% NaCleq). Stage II exhibits fluid inclusions in wolframite (183-355°C, 3.2–7.2 wt% NaCleq) and quartz (136-267°C, 2.4–6.6 wt% NaCleq), with δ18Ofluid values of + 3.1-+5.1‰, indicating significant meteoric water influx relative to Stage I (δ18Ofluid=+11.2-+12.0‰). Stage III contains the lowest-temperature-salinity fluid inclusions in fluorite (144-192°C, 0.9–1.6 wt% NaCleq). Raman spectroscopy reveals a fluid evolution from CO2–CH4-bearing (Stage I) to CO2-dominated (Stage II). The progressive decrease in temperature and salinity, coupled with increasing oxygen fugacity from Stage I to III, reflects the dilution of magmatic fluids by meteoric water. In-situ oxygen isotope variations in single cassiterite and wolframite crystals provide critical constraints on the precipitation mechanisms of ore minerals. Cassiterite precipitation in Stage I resulted from fluid cooling and redox reactions between Sn (II)-Cl complexes and As (III). In contrast, wolframite deposition in Stage II was triggered by a significant influx of meteoric water that reduced temperature and salinity. |
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