Xitieshan
Da Qaidam, Haixi, Qinghai (North Qaidam belt), China
Carbonate replacementPb-Zn (Ag)
- Type
- Intrusion-related carbonate replacement (CRD), metamorphosed
Massive sulfide lenses in marbles of the Ordovician Tanjianshan Group, 640,000 t at 4.86 % Zn and 4.16 % Pb, formed at about 350 to 420 °C; about 20 % of the ore is layered in schists, deformed and remobilised during regional metamorphism (greenschist to amphibolite). Sphalerite δ66Zn in marbles increases with altitude (Rayleigh fractionation), while sphalerite in schists decreases (remobilisation with sulfide melts); cadmium varies little and stays decoupled from zinc.
δ66Zn in ‰ (per mil) Values of the same system
Standard : JMC 3-0749L
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.26 ± 0.07 ‰ | 0.15 / 0.39 ‰ | 9 | undeformed sphalerite in marbles (Sp1) Mean and standard deviation recalculated from 9 samples, Table 1. Values increasing with altitude, from 2474 to 2762 m. | Zhao et al. (2023), Zinc and cadmium isotopic constraints on metal sources of the Xitiesh… |
| 0.12 ± 0.07 ‰ | 0.03 / 0.19 ‰ | 7 | deformed sphalerite in schists (Sp2) Mean and standard deviation recalculated from 7 samples, Table 1. Including zzx-10, in unit c sandstone (drill hole ZK16901). Lighter than Sp1 and decreasing with altitude. | Zhao et al. (2023), Zinc and cadmium isotopic constraints on metal sources of the Xitiesh… |
δ114/110Cd in ‰ (per mil) Values of the same system
Standard : NIST SRM 3108
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −0.03 ± 0.04 ‰ | −0.1 / 0.02 ‰ | 9 | undeformed sphalerite in marbles (Sp1) Mean and standard deviation recalculated from 9 samples, Table 1. The text writes -0.10 to -0.31 ‰ in the discussion, contradicting the table (-0.10 to +0.02 ‰). | Zhao et al. (2023), Zinc and cadmium isotopic constraints on metal sources of the Xitiesh… |
| −0.03 ± 0.02 ‰ | −0.06 / −0.01 ‰ | 7 | deformed sphalerite in schists (Sp2) Mean and standard deviation recalculated from 7 samples, Table 1. No cadmium fractionation during deformation, unlike zinc. | Zhao et al. (2023), Zinc and cadmium isotopic constraints on metal sources of the Xitiesh… |
Deposits of the same type
- Caixiashan China
- Xikuangshan China
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- Lavrion Greece
- Sierra Mojada District Mexico
- Santa Eulalia Mexico
- Darwin United States
Cite this page
IsoFind Atlas (2026). Xitieshan, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/xitieshan/ (accessed 2026-10-13).
@misc{isofind2026xitieshanisotopesignatures,
title = {Xitieshan, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/xitieshan/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13