Laochang (Gejiu district)
Gejiu, Yunnan, China
SkarnsSn-Cu (Pb, Zn)
- Type
- Cassiterite skarn and sulfides
Ore field of the Gejiu tin district, one of the largest in the world, mined since the Bronze Age: cassiterite skarns and sulfide bodies around Cretaceous granites (about 77 to 85 Ma). Cassiterite is heavier than the source granite. Indicative coordinates.
δ124Sn in ‰ (per mil) Values of the same system
Standard : NIST SRM 3161a
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.91 ± 0.91 ‰ | −0.74 / 1.91 ‰ | 6 | cassiterite from the cassiterite-sulfide zone (skarn) Mean and standard deviation recalculated from 6 samples, Table 3. Ore age used: 77 Ma. | Mathur et al. (2025), Global Sn isotope compositions of cassiterite identify the magmatic… |
Deposits of the same type
- Gejiu tin district (unspecified origin) China
- Gaosong (Gejiu district) China
- Dulong China
- Nanyangtian China
- Beiya China
- Luziyuan China
- Lame (Lamo, Dachang ore field) China
- Hongshan-Hongniu China
Cite this page
IsoFind Atlas (2026). Laochang (Gejiu district), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/laochang-district-de-gejiu/ (accessed 2026-10-13).
@misc{isofind2026laochanggejiudistrictisotopes,
title = {Laochang (Gejiu district), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/laochang-district-de-gejiu/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13