Deep-water diagenetic Fe-Mn deposit (nodule), South Atlantic (GeoB1037-2)
Atlantic Ocean
Other media
- Type
- Other medium
Deep-water diagenetic Fe-Mn deposit (nodule) of Rehkämper et al. (2002), South Atlantic, 5626 m water depth; 31.8 ppm Tl, 30.1 % Mn and 6.7 % Fe. Deep-water diagenetic nodules and crusts (0 to +9) are lighter than hydrogenetic crusts, the more so as their Mn/Fe is high (r = 0.97): closed-system adsorption of pore-water Tl, nearly quantitative for the lowest values. 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 |
|---|---|---|---|---|
| 3.3 ± 0.45 ε | 1 | Single analysis; ± 0.45 ε (2σ, external reproducibility on an in-house Fe-Mn crust); 31.8 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 |
|---|---|---|---|---|
| 19.142 ± 0.003 | 1 | Single analysis; uncertainty estimated from the external precision of about 150 ppm (2σ). | 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 |
|---|---|---|---|---|
| 15.742 ± 0.002 | 1 | Single analysis; uncertainty estimated from the external precision of about 150 ppm (2σ). | 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 |
|---|---|---|---|---|
| 39.256 ± 0.006 | 1 | Single analysis; uncertainty estimated from the external precision of about 150 ppm (2σ). | Rehkämper et al. (2002), Thallium isotope variations in seawater and hydrogenetic, diagen… |
Deposits of the same type
- Atlantic, Angola Basin, station KN192-5 13
- Atlantic, Angola Basin, station ANT XXIII/1 69/21
- Hydrogenetic Fe-Mn deposit (crust), South Atlantic (SO-84, DS43)
- Atlantic, Cape Basin, station ANT XXIII/1 69/26
- Atlantic, Guinea Basin/Chain Fracture Zone, station ANT XXIII/1 69/18
- Atlantic, Brazil Basin, station KN192-5 3
- South Atlantic, station 3 of the GEOTRACES 40° S cruise
- South Atlantic, station 6 of the GEOTRACES 40° S cruise
Cite this page
IsoFind Atlas (2026). Deep-water diagenetic Fe-Mn deposit (nodule), South Atlantic (GeoB1037-2), isotope signatures. https://www.isofind.tech/isotopes/en/sites/depot-fe-mn-diagenetique-profond-nodule-atlantique-sud-geob1037-2/ (accessed 2026-10-16).
@misc{isofind2026deepwaterdiageneticfemndeposi,
title = {Deep-water diagenetic Fe-Mn deposit (nodule), South Atlantic (GeoB1037-2), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/sites/depot-fe-mn-diagenetique-profond-nodule-atlantique-sud-geob1037-2/},
note = {Accessed 2026-10-16}
}Updated : 2026-10-16