Shallow-water diagenetic Fe-Mn deposit (micronodules), Gulf of Bothnia (82-43-108)
Baltic Sea
Other media
- Type
- Other medium
Shallow-water diagenetic Fe-Mn deposit (micronodules) of Rehkämper et al. (2002), Gulf of Bothnia, 94 m water depth; 15.8 and 19.5 ppm Tl, 30.2 % Mn and 5.6 % Fe. Shallow Baltic diagenetic deposits, growing very fast (about 10^4 mm/Myr), have ε205Tl close to seawater (-5 to 0) and little Tl: nearly quantitative capture of Tl from Mn- and Fe-rich pore waters, without net fractionation. Coordinates from Table 1.
ε205Tl in ε units (parts per 10,000) Values of the same system
Standard : NIST SRM 997
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −0.2 ε | −0.2 / −0.2 ε | 2 | Mean and standard deviation recalculated from 2 analyses (sample and duplicate: -0.2 and -0.2); ± 0.45 ε (2σ) on each value; 15.8 and 19.5 ppm Tl. | Rehkämper et al. (2002), Thallium isotope variations in seawater and hydrogenetic, diagen… |
206Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 20.764 ± 0.076 | 20.71 / 20.817 | 2 | Mean and standard deviation recalculated from 2 analyses (sample and duplicate: 20.71 and 20.817). | Rehkämper et al. (2002), Thallium isotope variations in seawater and hydrogenetic, diagen… |
207Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 15.874 ± 0.008 | 15.868 / 15.88 | 2 | Mean and standard deviation recalculated from 2 analyses (sample and duplicate: 15.868 and 15.88). | Rehkämper et al. (2002), Thallium isotope variations in seawater and hydrogenetic, diagen… |
208Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 39.427 ± 0.052 | 39.39 / 39.463 | 2 | Mean and standard deviation recalculated from 2 analyses (sample and duplicate: 39.39 and 39.463). | Rehkämper et al. (2002), Thallium isotope variations in seawater and hydrogenetic, diagen… |
Deposits of the same type
- Shallow-water diagenetic Fe-Mn deposit (encrustation), southwest Baltic Sea (MB99IS1)
- Black Sea, water column (southwestern basin)
- Decazeville coal combustion ash France
- Atlantic, Faroe-Shetland Channel, station 64PE318 6
- Atlantic, Bay of Biscay, station ANT XXIII/1 69/3
- Atlantic, Bay of Biscay, station ANT XXIII/1 69/6
- Iceland Basin, station 28 (RRS Discovery cruise 354)
- Tenerife coastal seawater (TSW) Spain
Cite this page
IsoFind Atlas (2026). Shallow-water diagenetic Fe-Mn deposit (micronodules), Gulf of Bothnia (82-43-108), isotope signatures. https://www.isofind.tech/isotopes/en/sites/depot-fe-mn-diagenetique-de-mer-peu-profonde-micronodules-golfe-de-botnie-82-43-108/ (accessed 2026-10-16).
@misc{isofind2026shallowwaterdiageneticfemndep,
title = {Shallow-water diagenetic Fe-Mn deposit (micronodules), Gulf of Bothnia (82-43-108), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/sites/depot-fe-mn-diagenetique-de-mer-peu-profonde-micronodules-golfe-de-botnie-82-43-108/},
note = {Accessed 2026-10-16}
}Updated : 2026-10-16