Tanyaokou
Langshan district, Urad Rear Banner, Bayannur, Inner Mongolia, China
SEDEXS-Zn-Pb-Cu
- Type
- Proterozoic stratiform exhalative Pb-Zn-Cu-S (SEDEX)
Westernmost deposit of the Langshan district, in carbonaceous schists and dolostones of the Proterozoic Zhaertai Group, metamorphosed to greenschist facies. Bedded and lenticular orebodies (main orebody no. 3); fluid inclusions with NaCl crystals, mean salinity 26 wt%. Lead model ages 1.92 to 2.07 Ga. Sulfur of sulfides (29 to 38.5 ‰) and sulfates attributed to seawater sulfate reduced in a closed basin. Deposit not located: the place cited in the source could not be tied to reliable coordinates.
206Pb/204Pb isotope ratio, no unit Values of the same system
Standard : Non précisé dans la publication
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 15.099 ± 0.092 | 15.002 / 15.207 | 6 | ore sulfides (pyrrhotite, chalcopyrite, pyrite, galena) Mean and standard deviation recalculated from 6 samples, Table 1, analyses of this study (TDB-17, TDB-19 ×2, TDB-23, T-24, TDB-27). Unradiogenic lead, between the mantle and lower-crust curves: significant mantle contribution according to the authors. The more radiogenic sphalerites from marbles (Li et al., 1986) are not included. | Ding et Jiang (2000), Stable isotope study of the Langshan polymetallic mineral district,… |
207Pb/204Pb isotope ratio, no unit Values of the same system
Standard : Non précisé dans la publication
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 15.086 ± 0.033 | 15.038 / 15.133 | 6 | ore sulfides (pyrrhotite, chalcopyrite, pyrite, galena) Mean and standard deviation recalculated from 6 samples, Table 1, analyses of this study (TDB-17, TDB-19 ×2, TDB-23, T-24, TDB-27). Unradiogenic lead, between the mantle and lower-crust curves: significant mantle contribution according to the authors. The more radiogenic sphalerites from marbles (Li et al., 1986) are not included. | Ding et Jiang (2000), Stable isotope study of the Langshan polymetallic mineral district,… |
208Pb/204Pb isotope ratio, no unit Values of the same system
Standard : Non précisé dans la publication
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 35.326 ± 0.276 | 35.03 / 35.688 | 6 | ore sulfides (pyrrhotite, chalcopyrite, pyrite, galena) Mean and standard deviation recalculated from 6 samples, Table 1, analyses of this study (TDB-17, TDB-19 ×2, TDB-23, T-24, TDB-27). Unradiogenic lead, between the mantle and lower-crust curves: significant mantle contribution according to the authors. The more radiogenic sphalerites from marbles (Li et al., 1986) are not included. | Ding et Jiang (2000), Stable isotope study of the Langshan polymetallic mineral district,… |
δ34S in ‰ (per mil) Values of the same system
Standard : V-CDT
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 34.95 ± 3.22 ‰ | 29.1 / 38.5 ‰ | 13 | sulfides (pyrite, pyrrhotite, chalcopyrite) Mean and standard deviation recalculated from 13 samples, Table 2: 7 pyrites, 3 pyrrhotites, 3 chalcopyrites. Mineral pairs are in disequilibrium. Sulfides as heavy as the sulfates. | Ding et Jiang (2000), Stable isotope study of the Langshan polymetallic mineral district,… |
| 32.18 ± 1.08 ‰ | 30.9 / 33.4 ‰ | 6 | sulfates (vein gypsum, bedded barite) Mean and standard deviation recalculated from 6 samples, Table 2: 3 gypsum, 3 barite. Bedded barite in dolostones (30.9 to 33.4 ‰) would record seawater sulfate δ34S about 2.0 Ga ago. The adit copper sulfate (34.6 ‰, supergene) is not counted. | Ding et Jiang (2000), Stable isotope study of the Langshan polymetallic mineral district,… |
δ13C in ‰ (per mil) Values of the same system
Standard : V-PDB
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −4.4 ± 2.6 ‰ | −6.6 / −0.1 ‰ | 5 | ore and vein carbonates Mean and standard deviation recalculated from 5 samples, Table 3, analyses of this study: ore dolomites (T-13, TDB-20), vein calcites (T-25, TDB-13) and vein dolomite (TDB-23). Host dolomitic limestone (TDB-4): -4.9 and 18.4 ‰. | Ding et Jiang (2000), Stable isotope study of the Langshan polymetallic mineral district,… |
δ18O in ‰ (per mil) Values of the same system
Standard : V-SMOW
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 18 ± 2.9 ‰ | 14.4 / 22.4 ‰ | 5 | ore and vein carbonates Mean and standard deviation recalculated from 5 samples, Table 3, analyses of this study: ore dolomites (T-13, TDB-20), vein calcites (T-25, TDB-13) and vein dolomite (TDB-23). Host dolomitic limestone (TDB-4): -4.9 and 18.4 ‰. | Ding et Jiang (2000), Stable isotope study of the Langshan polymetallic mineral district,… |
| 14.5 ± 3.2 ‰ | 11.5 / 19 ‰ | 7 | vein and ore quartz Mean and standard deviation recalculated from 7 samples, Table 4. Veins in schists (11.5 to 13.6 ‰) are lighter than ore quartz (17.1 to 19.0 ‰). Quartzites: 14.2 and 11.5 ‰. | Ding et Jiang (2000), Stable isotope study of the Langshan polymetallic mineral district,… |
δ30Si in ‰ (per mil) Values of the same system
Standard : NBS 28
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0 ± 0.3 ‰ | −0.2 / 0.2 ‰ | 2 | ore quartz and chert band Mean and standard deviation recalculated from 2 samples, Table 4, checked on the image: coarse pyrite ore quartz (TDB-24, -0.2 ‰) and ore chert band (T-34, 0.2 ‰). Quartzites -0.1 and 0 ‰; biotite -0.2 ‰ (TDB-20), phlogopite -0.5 ‰ (TDB-17). | Ding et Jiang (2000), Stable isotope study of the Langshan polymetallic mineral district,… |
Deposits of the same type
- Red Dog United States
- McArthur River (HYC) Australia
- Sullivan Canada
- Red Dog (Anarraaq, Wulik) United States
- Wusihe China
- Langshan China
- Rajpura-Dariba India
- Aulus-les-Bains district France
Cite this page
IsoFind Atlas (2026). Tanyaokou, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/tanyaokou/ (accessed 2026-10-13).
@misc{isofind2026tanyaokouisotopesignatures,
title = {Tanyaokou, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/tanyaokou/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13