Cuona
Tibet, Basu County (Changdu area), China
Other hydrothermalPb-Zn-Ag
- Type
- Pb-Zn-Ag hosted in Upper Triassic sandstones
Pb-Zn deposit hosted in Upper Triassic sediments of the Changdu (Qamdo) area, eastern Tibet. Sulfide mercury, with negative MIF like the metamorphic basement and altered rocks but unlike barren sediments, would come mainly from the underlying basement. Resource of 0.17 Mt Pb, 0.09 Mt Zn and 552 t Ag, in Adula Formation quartz sandstones. Indicative coordinates.
δ202Hg in ‰ (per mil) Values of the same system
Standard : NIST SRM 3133
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −0.05 ± 0.31 ‰ | −0.5 / 0.48 ‰ | 7 | galena Mean and standard deviation recalculated from 7 samples, Table 2. The text counts 8 analyses, including the CN-120 replicate. | Xu et al. (2018), Mercury isotope constraints on the source for sediment-hosted lead-zinc… |
| 0.28 ± 0.41 ‰ | −0.36 / 0.66 ‰ | 7 | sphalerite Mean and standard deviation recalculated from 7 samples, Table 2. Hg-rich sphalerite (52 to 192 ppm). | Xu et al. (2018), Mercury isotope constraints on the source for sediment-hosted lead-zinc… |
| 0.55 ± 1.22 ‰ | −0.31 / 1.41 ‰ | 2 | altered Adula Formation sandstones Mean and standard deviation recalculated from 2 samples, Table 1. | Xu et al. (2018), Mercury isotope constraints on the source for sediment-hosted lead-zinc… |
Δ199Hg in ‰ (per mil) Values of the same system
Standard : NIST SRM 3133
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −0.09 ± 0.05 ‰ | −0.16 / −0.04 ‰ | 7 | galena Mean and standard deviation recalculated from 7 samples, Table 2. | Xu et al. (2018), Mercury isotope constraints on the source for sediment-hosted lead-zinc… |
| −0.13 ± 0.12 ‰ | −0.27 / 0.07 ‰ | 7 | sphalerite Mean and standard deviation recalculated from 7 samples, Table 2. | Xu et al. (2018), Mercury isotope constraints on the source for sediment-hosted lead-zinc… |
| −0.15 ± 0.01 ‰ | −0.16 / −0.14 ‰ | 2 | altered Adula Formation sandstones Mean and standard deviation recalculated from 2 samples, Table 1. | Xu et al. (2018), Mercury isotope constraints on the source for sediment-hosted lead-zinc… |
Deposits of the same type
- Xiuwacu China
- Mahuaping China
- Zhaxikang China
- Dalucao China
- Jigongcun China
- Shuitoushan China
- Shuiyindong China
- West Xiaodushan China
Cite this page
IsoFind Atlas (2026). Cuona, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/cuona/ (accessed 2026-10-13).
@misc{isofind2026cuonaisotopesignatures,
title = {Cuona, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/cuona/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13