Soil profile near the Nanhua mine

Eastern Yunnan, Nanhua mine, China

Soils

Type: Soil

Surroundings of the Nanhua arsenic-thallium mine (eastern Yunnan), where As2O3 was produced for over 40 years until 2000. Three mixing end-members: lorandite ore (-0.10), host rock (+1.85) and roasting tailings (+5.35); mine wastes supply on average 78 % of Tl in surface soils, over 90 % in the profile and almost all in rhizosphere soils; values too heavy for mixing (surface soil 6, profile 2 at 20-40 cm) are ascribed to Tl oxidation and fixation on Fe-Mn oxides (abundant hematite). (Wei et al., 2026). Coordinates not published (map only); individual values from Table S2; profile levels numbered without published depths, except level 2 (20-40 cm).

ε205Tl in ε units (parts per 10,000) Values of the same system

Standard : NIST SRM 997

Value	n	Mineral or matrix	Source
5.03 ± 0.45 ε	1	profile soil, level 1 Published value; ± 0.45 (2 SD).	Wei et al. (2026), Tracing thallium pollution in arsenic mining/smelting areas using high…
6.35 ± 0.44 ε	1	profile soil, level 2 Published value; ± 0.44 (2 SD); level at 20-40 cm according to the text, highest value of the study, beyond the tailings end-member.	Wei et al. (2026), Tracing thallium pollution in arsenic mining/smelting areas using high…
3.81 ± 0.25 ε	1	profile soil, level 3 Published value; ± 0.25 (2 SD).	Wei et al. (2026), Tracing thallium pollution in arsenic mining/smelting areas using high…
3.69 ± 0.38 ε	1	profile soil, level 4 Published value; ± 0.38 (2 SD).	Wei et al. (2026), Tracing thallium pollution in arsenic mining/smelting areas using high…
1.85 ± 0.55 ε	1	profile soil, level 5 Published value; ± 0.55 (2 SD).	Wei et al. (2026), Tracing thallium pollution in arsenic mining/smelting areas using high…
0.69 ± 0.68 ε	1	profile soil, level 6 Published value; ± 0.68 (2 SD).	Wei et al. (2026), Tracing thallium pollution in arsenic mining/smelting areas using high…
3.05 ± 0.29 ε	1	profile soil, level 7 Published value; ± 0.29 (2 SD).	Wei et al. (2026), Tracing thallium pollution in arsenic mining/smelting areas using high…
2.13 ± 0.56 ε	1	profile soil, level 8 Published value; ± 0.56 (2 SD).	Wei et al. (2026), Tracing thallium pollution in arsenic mining/smelting areas using high…
2.24 ± 0.18 ε	1	profile soil, level 9 Published value; ± 0.18 (2 SD).	Wei et al. (2026), Tracing thallium pollution in arsenic mining/smelting areas using high…

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Cite this page

IsoFind Atlas (2026). Soil profile near the Nanhua mine, isotope signatures. https://www.isofind.tech/isotopes/en/sites/profil-de-sol-pres-de-la-mine-de-nanhua/ (accessed 2026-10-16).

@misc{isofind2026soilprofilenearthenanhuaminei,
  title = {Soil profile near the Nanhua mine, isotope signatures},
  author = {{IsoFind Atlas}},
  year = {2026},
  url = {https://www.isofind.tech/isotopes/en/sites/profil-de-sol-pres-de-la-mine-de-nanhua/},
  note = {Accessed 2026-10-16}
}

Updated : 2026-10-16