Xiuwacu
Shangri-La (Zhongdian), north-western Yunnan, southern Yidun terrane, China
Other hydrothermalW-Mo
- Type
- Granite-related scheelite-molybdenite quartz veins
9.16 Mt at 0.26 % WO3 and 0.27 % Mo, in the Xiuwacu complex (Late Triassic biotite granite, Late Cretaceous porphyritic monzogranite, 88-73 Ma); molybdenite dated at 80-86 Ma (Re-Os). Three stages: fluorite-quartz, scheelite-quartz, calcite-quartz. Scheelite precipitated by cooling and calcium input. Coordinates of Shangri-La city. Indicative coordinates.
δ34S in ‰ (per mil) Values of the same system
Standard : V-CDT
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 4.45 ‰ | 2.44 / 6.1 ‰ | chalcopyrite Published summary, Table 3 mixes these analyses with earlier data. Order chalcopyrite > pyrite > molybdenite, the reverse of equilibrium; sulfide mean 3.84 ‰, magmatic sulfur from the lower crust. | Zhang et al. (2021), Stable isotope and fluid inclusion constraints on the source and evo… | |
| 4.06 ‰ | 3.2 / 4.8 ‰ | pyrite Published summary, Table 3 mixes these analyses with earlier data. Order chalcopyrite > pyrite > molybdenite, the reverse of equilibrium; sulfide mean 3.84 ‰, magmatic sulfur from the lower crust. | Zhang et al. (2021), Stable isotope and fluid inclusion constraints on the source and evo… | |
| 2.99 ‰ | 2.07 / 4.8 ‰ | molybdenite Published summary, Table 3 mixes these analyses with earlier data. Order chalcopyrite > pyrite > molybdenite, the reverse of equilibrium; sulfide mean 3.84 ‰, magmatic sulfur from the lower crust. | Zhang et al. (2021), Stable isotope and fluid inclusion constraints on the source and evo… |
δ18O in ‰ (per mil) Values of the same system
Standard : V-SMOW
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 9 / 11.8 ‰ | 4 | scheelite-stage quartz Published summary, four samples; calculated fluid -2.5 to 0.5 ‰. Fluorite-stage quartz: 11.1 ‰ (fluid +5.9 ‰). | Zhang et al. (2021), Stable isotope and fluid inclusion constraints on the source and evo… | |
| 20.7 / 20.9 ‰ | 2 | late calcite-quartz stage calcite Published summary, two samples; calculated fluid 3.7 to 3.9 ‰. | Zhang et al. (2021), Stable isotope and fluid inclusion constraints on the source and evo… |
δ13C in ‰ (per mil) Values of the same system
Standard : V-PDB
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −8.8 / −5.2 ‰ | 4 | CO2 of scheelite-stage quartz inclusions Published summary, four samples, magmatic or deep carbon. Fluorite-stage quartz: -9.4 ‰. | Zhang et al. (2021), Stable isotope and fluid inclusion constraints on the source and evo… | |
| −1.8 / −1.4 ‰ | 2 | late calcite-quartz stage calcite Published summary, two samples; carbon from dissolution of marine carbonates. | Zhang et al. (2021), Stable isotope and fluid inclusion constraints on the source and evo… |
Deposits of the same type
- Mahuaping China
- Dalucao China
- Cuona China
- Shuitoushan China
- Shuiyindong China
- Zhaxikang China
- Na Bop-Pu Sap Viêt Nam
- Tongkeng (Changpo-Tongkeng) China
Cite this page
IsoFind Atlas (2026). Xiuwacu, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/xiuwacu/ (accessed 2026-10-13).
@misc{isofind2026xiuwacuisotopesignatures,
title = {Xiuwacu, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/xiuwacu/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13