Table 1 Transition metal content in ~ 2.46 Ga greenalite (Transvaal Supergroup), calculated metal concentrations for palaeoproterozoic seawater, and data for key cations in modern seawater for comparison. palaeoproterozoic seawater concentrations are based on experimentally determined partition coefficients for each metal (ref. 5) and an assumed Fe concentration of 0.1 mmol.kg− 1.
From: A window into transition metal availability in early palaeoproterozoic seawater
Metal | Content in natural greenalite (mol.kg− 1) | Calc. concentration in Palaeoproterozoic seawater (mol.kg− 1) | Reference | Concentration range in modern seawater (mol.kg− 1) | Reference |
|---|---|---|---|---|---|
Mn | 9.710–38.96 | 3.32–7.64 × 10− 3 | This study | 0.1–3.8 × 10− 9 | Ref. 38 |
Zn | 0.400–1.250 | 0.97–1.24 × 10− 12 | This study | 0.1–2.5 × 10− 9 | Ref. 38 |
V | 0.224–1.338 | 0.17–1.02 × 10− 12 | This study | 1.3–2.2 × 10− 8 | Ref. 56 |
Co | 0.012–0.058 | 0.24–0.67 × 10− 9 | This study | 0.097–1.0 × 10− 12 | Ref. 57 |
Ni | 0.104–0.441 | 3.79–6.73 × 10− 9 | This study | 1.9–3.9 × 10− 9 | Ref. 58 |
Fe | N/A | 0.1–1 × 10− 3 | Ref. 23 | 0.1–10 × 10− 9 | Ref. 59 |
Mg | N/A | ~ 20–50 × 10− 3 | Ref. 46 | 52–58 × 10− 3 | Ref. 60 |
