Wolbrom fen
Lesser Poland, Olkusz mining district, Poland
Soils
- Type
- Soil
Carex and Phragmites fen whose peat goes back to about 9900 BC, about 20 km north-east of Olkusz, in the Zn-Pb mining district of Olkusz and the Bolesław smelter. 110 cm profile dated by 210Pb and 14C: Tl immobile in the peat, like Pb, whereas Zn migrates. The ε205Tl of the years 1971 to 2004 (-3.57 to -2.30) trend towards the Olkusz ZnS concentrates (-4.40) and smelter wastes, those of the old peat (about 300 BC) towards the substrate; 206Pb/207Pb lowered below 16 cm by local mining lead (galena 1.173, ash 1.174). Published GPS coordinates (Vaněk et al., 2021).
ε205Tl in ε units (parts per 10,000) Values of the same system
Standard : NIST SRM 997
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −2.98 ± 0.47 ε | −3.57 / −2.3 ε | 5 | peat at 4 to 14 cm (1971 to 2004 by 210Pb) Mean and standard deviation recalculated from 5 analyses, samples 3 to 7, 0.72 to 0.84 mg/kg Tl; ± 0.7 ε (2 SD) on each value; anthropogenic Tl from the mining and processing of the Olkusz ores. | Vaněk et al. (2021), Thallium and lead variations in a contaminated peatland: A combined … |
| −1.3 ± 0.27 ε | −1.59 / −1.06 ε | 3 | old peat at 34 to 40 cm (about 300 BC at the base) Mean and standard deviation recalculated from 3 analyses, samples 18 to 20, 0.35 to 0.42 mg/kg Tl; ± 0.7 ε (2 SD) on each value; mostly geogenic Tl, between the underlying Turonian chalk (+0.47) and clayey sand (-1.47). | Vaněk et al. (2021), Thallium and lead variations in a contaminated peatland: A combined … |
206Pb/207Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 1.1714 ± 0.0053 | 1.1641 / 1.1792 | 10 | peat at 0 to 20 cm (1946 to 2016 by 210Pb) Mean and standard deviation recalculated from 10 analyses, samples 1 to 10; minimum of 1.1641 around 1998, close to the local galena (1.173) and smelter ash (1.174). | Vaněk et al. (2021), Thallium and lead variations in a contaminated peatland: A combined … |
| 1.1742 ± 0.0026 | 1.1693 / 1.1768 | 10 | peat at 20 to 40 cm (undated, 300 BC at the base) Mean and standard deviation recalculated from 10 analyses, samples 11 to 20; deeper peat (below 40 cm) reaches 1.1906 (Table S5), towards the substrate (1.1856 to 1.1893). | Vaněk et al. (2021), Thallium and lead variations in a contaminated peatland: A combined … |
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Cite this page
IsoFind Atlas (2026). Wolbrom fen, isotope signatures. https://www.isofind.tech/isotopes/en/sites/tourbiere-de-wolbrom/ (accessed 2026-10-15).
@misc{isofind2026wolbromfenisotopesignatures,
title = {Wolbrom fen, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/sites/tourbiere-de-wolbrom/},
note = {Accessed 2026-10-15}
}Updated : 2026-10-15