Nanhua (arsenic-thallium mine)
Eastern Yunnan, near the Malong River fold belt, China
Other hydrothermalAs (Tl)
- Type
- Low-temperature hydrothermal As-Tl deposit (realgar, lorandite)
Tl-rich arsenic deposit of the South China platform (Yangtze Block), first mined for realgar; reserves of about 1.66 Mt arsenic; production of 1000 t/yr As2O3 for over 40 years until closure in 2000. Lorandite (TlAsS2) ore according to TEM, ε205Tl of -0.10; roasting tailings are much heavier (+3.38 to +5.35) and supply on average 78 % of Tl in nearby soils (three end-member model, Wei et al., 2026). Coordinates not published.
ε205Tl in ε units (parts per 10,000) Values of the same system
Standard : NIST SRM 997
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −0.1 ± 0.32 ε | 1 | lorandite (TlAsS2) ore Single published value; ± 0.32 (2 SD); up to 24,500 mg/kg As; ore end-member of the soil mixing model; strong fractionation separates the ore from smelting tailings (+3.38 to +5.35), light Tl going to the volatile phase. | Wei et al. (2026), Tracing thallium pollution in arsenic mining/smelting areas using high… |
Deposits of the same type
Cite this page
IsoFind Atlas (2026). Nanhua (arsenic-thallium mine), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/nanhua-mine-d-arsenic-et-de-thallium/ (accessed 2026-10-16).
@misc{isofind2026nanhuaarsenicthalliummineisot,
title = {Nanhua (arsenic-thallium mine), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/nanhua-mine-d-arsenic-et-de-thallium/},
note = {Accessed 2026-10-16}
}Updated : 2026-10-16