Huangjiawan (Niutitang Ni-Mo horizon)
Zunyi district, Guizhou (Yangtze Platform margin), China
SEDEXMo-Ni (V, PGE, Au)
- Type
- Hyper-metalliferous sulphidic Ni-Mo black shale (Early Cambrian)
Layer a few centimetres to 60 cm thick, phosphate-rich, with over 10 % sulphur and organic carbon, enriched in Mo and Ni up to the percent level and in As, Au, PGE, Re, Cu, Zn, Cd, Ag, Sb, Se, Tl and Hg; discontinuous over more than 1000 km along the rifted margin of the Yangtze Platform (Zunyi and Sancha districts). Grades laterally into vanadium shales and sapropelites. Origin debated between hydrothermal exhalation and euxinic seawater; the authors favour a chain of marine processes with brine input. δ114Cd +0.31 ± 0.10 ‰ in the sulphidic horizon, 0.00 ± 0.14 ‰ in barren shales (Frei et al., 2020); δ98Mo from -0.1 to +2.3 ‰. Classed as SEDEX for lack of a black-shale family. Indicative coordinates.
δ65Cu in ‰ (per mil) Values of the same system
Standard : ERM-AE633
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.03 ± 0.26 ‰ | Ni-Mo sulphidic horizon (whole rock) Zunyi and Sancha. Authigenic copper near 1000 ppm with no net fractionation relative to the lithogenic background (+0.08 ± 0.17 ‰). | Lehmann et al. (2022), Early Cambrian highly metalliferous black shale in South China: Cu… |
δ66Zn in ‰ (per mil) Values of the same system
Standard : JMC 3-0749L
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 1.11 ± 0.18 ‰ | Ni-Mo sulphidic horizon (whole rock) Heavy zinc controlled by sulphide fractionation; study range +0.41 to +1.45 ‰. | Lehmann et al. (2022), Early Cambrian highly metalliferous black shale in South China: Cu… | ||
| 0.6 ± 0.18 ‰ | vanadium-rich and barren black shales (whole rock) lighter than the sulphidic horizon. | Lehmann et al. (2022), Early Cambrian highly metalliferous black shale in South China: Cu… |
δ60Ni in ‰ (per mil) Values of the same system
Standard : NIST SRM 986
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −0.84 ± 0.05 ‰ | Ni-Mo sulphidic horizon (whole rock) light nickel at the percent level: hydrothermal leaching of mafic rocks and their sulphides, or sorption on Fe oxyhydroxides and redox cycling according to the authors. | Lehmann et al. (2022), Early Cambrian highly metalliferous black shale in South China: Cu… |
Deposits of the same type
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Cite this page
IsoFind Atlas (2026). Huangjiawan (Niutitang Ni-Mo horizon), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/huangjiawan-horizon-ni-mo-du-niutitang/ (accessed 2026-10-13).
@misc{isofind2026huangjiawanniutitangnimohoriz,
title = {Huangjiawan (Niutitang Ni-Mo horizon), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/huangjiawan-horizon-ni-mo-du-niutitang/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13