Watershed
Mossman Orogen, North Queensland (about 35 km north-west of Mount Carbine), Australia
SkarnsW
- Type
- Skarn- and shear vein-hosted scheelite of metamorphic origin
Scheelite deposit (70,000 t WO3, 49.3 Mt at 0.14 % WO3) in skarn-altered conglomerates, psammites and slates of the Ordovician-Silurian Hodgkinson Formation, in a former fore-arc basin. Early metamorphic scheelite, then Permian scheelite (about 275 Ma) in shear veins and haloes at about 300 °C and 1 to 1.8 kbar, deposited by a low-salinity, reduced metamorphic fluid; Permian granites supplied the heat. Indicative coordinates.
δ18O in ‰ (per mil) Values of the same system
Standard : V-SMOW
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 5.4 ± 1.1 ‰ | 3.7 / 7.3 ‰ | 17 | vein scheelite Mean and standard deviation recalculated from 17 samples, Table 2. D4 veins, retrograde stage 2. Fluid from 4.6 to 8.6 ‰ at 306 ± 56 °C (scheelite-plagioclase pair): metamorphic. | Poblete et al. (2024), The Permian Watershed tungsten deposit (northeast Queensland, Aust… |
| 10.3 ± 1.4 ‰ | 7 / 11.8 ‰ | 14 | plagioclase coexisting with scheelite Mean and standard deviation recalculated from 14 samples, Table 2. D4 veins, retrograde stage 2. | Poblete et al. (2024), The Permian Watershed tungsten deposit (northeast Queensland, Aust… |
| 14 ± 0.9 ‰ | 12.6 / 15.5 ‰ | 13 | vein quartz Mean and standard deviation recalculated from 13 samples, Table 2. D4 veins, retrograde stage 2. Coeval with or slightly later than scheelite. | Poblete et al. (2024), The Permian Watershed tungsten deposit (northeast Queensland, Aust… |
| 12.4 ± 0.9 ‰ | 11.5 / 13.2 ‰ | 3 | muscovite of veins and halo (retrograde stage 3) Mean and standard deviation recalculated from 3 samples, Table 3. | Poblete et al. (2024), The Permian Watershed tungsten deposit (northeast Queensland, Aust… |
δD in ‰ (per mil) Values of the same system
Standard : V-SMOW
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −68.5 ± 5.1 ‰ | −73.4 / −63.3 ‰ | 3 | muscovite of veins and halo (retrograde stage 3) Mean and standard deviation recalculated from 3 samples, Table 3. Mineral δD. The text gives -62.7 ‰ for the second centreline muscovite, the table -68.7 ‰: computed on the table. | Poblete et al. (2024), The Permian Watershed tungsten deposit (northeast Queensland, Aust… |
δ34S in ‰ (per mil) Values of the same system
Standard : V-CDT
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −0.5 ± 1.2 ‰ | −2.5 / 2.2 ‰ | 17 | pyrrhotite Mean and standard deviation recalculated from 17 samples, Table 4. D4 vein sulfides, retrograde stage 4. | Poblete et al. (2024), The Permian Watershed tungsten deposit (northeast Queensland, Aust… |
| 1.4 ± 1.1 ‰ | −0.2 / 2.8 ‰ | 5 | arsenopyrite Mean and standard deviation recalculated from 5 samples, Table 4. D4 vein sulfides, retrograde stage 4. The text gives a minimum of -0.12 ‰, the table -0.2 ‰. | Poblete et al. (2024), The Permian Watershed tungsten deposit (northeast Queensland, Aust… |
| 0.1 ± 0.7 ‰ | −0.5 / 1.3 ‰ | 5 | pyrite and sphalerite Mean and standard deviation recalculated from 5 samples, Table 4. D4 vein sulfides, retrograde stage 4. Pyrite -0.5 to 1.3 ‰, sphalerite -0.2 and 0.3 ‰. | Poblete et al. (2024), The Permian Watershed tungsten deposit (northeast Queensland, Aust… |
Deposits of the same type
- Kano Japan
- Kuga (tungsten) Japan
- Fujigatani Japan
- Kiwada Japan
- Shizhuyuan China
- Xianghualing China
- Xiaoyao China
- Xiaotongguanshan China
Cite this page
IsoFind Atlas (2026). Watershed, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/watershed/ (accessed 2026-10-13).
@misc{isofind2026watershedisotopesignatures,
title = {Watershed, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/watershed/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13