Wu, Xiangyu; Deng, Xiaohua; Brzozowski, Matthew J.; He, Xiheng; Wang, Xin; Li, Yanxing; Li, Chao; Tao, Chaoqun (2026) In situ trace elements and Sr isotopes of scheelite from the tungsten deposits in NW China: Implications for ore-forming fluid origin and evolution. Ore Geology Reviews, 193. p.107273. doi:10.1016/j.oregeorev.2026.107273
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | In situ trace elements and Sr isotopes of scheelite from the tungsten deposits in NW China: Implications for ore-forming fluid origin and evolution | ||
| Journal | Ore Geology Reviews | ||
| Authors | Wu, Xiangyu | Author | |
| Deng, Xiaohua | Author | ||
| Brzozowski, Matthew J. | Author | ||
| He, Xiheng | Author | ||
| Wang, Xin | Author | ||
| Li, Yanxing | Author | ||
| Li, Chao | Author | ||
| Tao, Chaoqun | Author | ||
| Year | 2026 (June) | Volume | < 193 > |
| Page(s) | 107273 | ||
| Publisher | Elsevier BV | ||
| URL | |||
| DOI | doi:10.1016/j.oregeorev.2026.107273Search in ResearchGate | ||
| Generate Citation Formats | |||
| Classification | Not set | LoC | Not set |
| Mindat Ref. ID | 19895949 | Long-form Identifier | mindat:1:5:19895949:8 |
| GUID | 0 | ||
| Full Reference | Wu, Xiangyu; Deng, Xiaohua; Brzozowski, Matthew J.; He, Xiheng; Wang, Xin; Li, Yanxing; Li, Chao; Tao, Chaoqun (2026) In situ trace elements and Sr isotopes of scheelite from the tungsten deposits in NW China: Implications for ore-forming fluid origin and evolution. Ore Geology Reviews, 193. p.107273. doi:10.1016/j.oregeorev.2026.107273 | ||
| Plain Text | Wu, Xiangyu; Deng, Xiaohua; Brzozowski, Matthew J.; He, Xiheng; Wang, Xin; Li, Yanxing; Li, Chao; Tao, Chaoqun (2026) In situ trace elements and Sr isotopes of scheelite from the tungsten deposits in NW China: Implications for ore-forming fluid origin and evolution. Ore Geology Reviews, 193. p.107273. doi:10.1016/j.oregeorev.2026.107273 | ||
| In | Link this record to the correct parent record (if possible) | ||
| Abstract/Notes | The Eastern Tianshan in NW China hosts a diversity of mineralization, including porphyry Cu, volcanogenic massive sulfide Cu–Zn, magmatic Ni–Cu, epithermal Au, and orogenic Au deposits. Recent exploration has also revealed numerous W deposits in this region. Given their recent identification, the mechanisms by which these deposits formed and the sources of their ore-forming fluids remain poorly constrained. Here, we utilize in situ trace elements and Sr isotope compositions of scheelite from six deposits (quartz vein and skarn deposits, and composite varieties comprising multiple styles of mineralization) to characterize the properties of the ore-forming fluids and trace their sources. Rare earth elements (REE3+) largely substitute into scheelite for Ca2+ via the mechanism 3Ca2+ = 2REE3++□Ca (□ = vacancy). Scheelite from quartz vein-type deposits is characterized by light REE (LREE) enrichment and positive Eu anomalies. In contrast, scheelite in skarn-type deposits exhibits variable LREE enrichment and negative Eu anomalies. Scheelite in composite deposits is compositionally diverse. At Wutonggou, scheelite in both the quartz vein and skarn mineralization displays flat REE patterns with positive Eu anomalies, whereas scheelite in the quartz vein and skarn mineralization at Shadong are characterized by middle REE (MREE) enrichment and negative to positive Eu anomalies. The strong correlation between Eu–Eu*, coupled with the high Mo concentrations in skarn-type scheelite, suggests precipitation from relatively oxidized fluids. Conversely, the weak Eu–Eu* correlation and low Mo in quartz vein-type scheelite suggest precipitation from more reduced fluids. These variable redox conditions are consistent with the changes in fO2 observed in skarn and quartz vein-type mineralization at both Wutonggou and Shadong. The 87Sr/86Sr ratios of all scheelite are systematically higher than those of their host granites, but lower than those of the Precambrian basement rocks. This can be explained by Sr within the ore-forming fluid having been primarily derived from the granites, and subsequently modified by substantial interaction with the Precambrian basement rocks. | ||
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