Xiangquan
Eastern Anhui, He County (Middle-Lower Yangtze metallogenic belt), China
Other hydrothermalTl
- Type
- Tl-only deposit in micritic limestones
First known thallium-only deposit, about 2 km northeast of Xiangquan town: stratabound and lenticular bodies 10 to 15 m thick in micritic limestones, marls and mudstones of the Lunshan Formation (Lower Ordovician), controlled by the Xiao-Xiaolongwang-Dalongwang anticline. Thallium mainly in the pyrite lattice, rarely as micro-inclusions (lorandite); quartz, fluorite, barite and carbonate gangue. Fan et al. (2014) see a submarine hydrothermal deposit later overprinted (18 ± 2 ‰ offset between pyrite and Ordovician seawater), whereas Zhou et al. (2005) described an epithermal system. Indicative coordinates, derived from the distance to the He county seat (about 20 km northwest).
δ34S in ‰ (per mil) Values of the same system
Standard : V-CDT
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 8.96 ± 1.3 ‰ | 6.91 / 10.05 ‰ | 6 | Tl-bearing pyrite (gel and fine-grained) Mean and standard deviation recalculated from 6 analyses, the text gives a mean of 9.05 ‰ for a range of 6.915 to 10.05 ‰, against 8.96 ‰ recalculated. | Fan et al. (2014), Geological and geochemical constraints on the genesis of the Xiangquan… |
| 20.44 ‰ | 1 | hydrothermal-stage barite Single analysis; sample ZJS-01, close to Ordovician seawater sulphate (27 ± 2 ‰ according to the authors). | Fan et al. (2014), Geological and geochemical constraints on the genesis of the Xiangquan… |
δ30Si in ‰ (per mil) Values of the same system
Standard : NBS 28
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −1.8 ± 0.28 ‰ | −2 / −1.6 ‰ | 2 | disseminated and banded ore (whole-rock silica) Mean and standard deviation recalculated from 2 analyses, samples ZK101-15 and ZK101-28; light silicon, as in submarine hydrothermal cherts. | Fan et al. (2014), Geological and geochemical constraints on the genesis of the Xiangquan… |
| −2.1 ‰ | 1 | Lunshan Formation chert (host rock) Single analysis; sample GG-02. | Fan et al. (2014), Geological and geochemical constraints on the genesis of the Xiangquan… |
Deposits of the same type
- Lengshuikeng China
- Fenglin China
- Dahutang (Shimensi ore block) China
- Shangfang China
- Canzhuang (Jiaodong gold district) China
- Hukeng China
- Jiaojia (Jiaodong gold district) China
- Linglong (Jiaodong gold district) China
Cite this page
IsoFind Atlas (2026). Xiangquan, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/xiangquan/ (accessed 2026-10-15).
@misc{isofind2026xiangquanisotopesignatures,
title = {Xiangquan, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/xiangquan/},
note = {Accessed 2026-10-15}
}Updated : 2026-10-15