Table 4.
Results of the PHREECQ-Modeled Runs for Mineral Precipitation in Hadean Seawater
| PCO2 | T (C) | Final pH | [Ca]T (m/L) | [Fe(II)]T (m/L) | SI (calcite) | SI (siderite) | Model |
|---|---|---|---|---|---|---|---|
| 1.0 | 50 | 7.99 | 5.02E-04 | 1.10E-07 | 1.01 | −1.29 | 1 |
| 3.2 | 50 | 7.70 | 6.55E-04 | 3.29E-07 | 1.1 | −1.04 | 1 |
| 10.0 | 50 | 7.44 | 9.48E-04 | 9.55E-07 | 1.19 | −0.83 | 1 |
| 100.0 | 50 | 7.04 | 2.14E-03 | 6.10E-06 | 1.42 | −0.43 | 1 |
| 1.0 | 100 | 7.08 | 5.18E-05 | 5.93E-07 | −0.41 | −0.59 | 1 |
| 3.2 | 100 | 6.81 | 5.35E-05 | 1.68E-06 | −0.41 | −0.37 | 1 |
| 10.0 | 100 | 6.56 | 5.44E-05 | 4.60E-06 | −0.47 | −0.17 | 1 |
| 100.0 | 100 | 6.14 | 5.37E-05 | 2.99E-05 | −0.68 | 0.18 | 1 |
| 1.0 | 50 | 7.28 | 2.85E-06 | 1.87E-06 | −1.37 | −0.7 | 2 |
| 3.2 | 50 | 7.12 | 3.86E-06 | 3.98E-06 | −1.3 | −0.54 | 2 |
| 10.0 | 50 | 7.00 | 5.88E-06 | 7.73E-06 | −1.14 | −0.35 | 2 |
| 100.0 | 50 | 6.87 | 9.25E-06 | 1.78E-05 | −0.84 | 0.05 | 2 |
| 1.0 | 100 | 6.74 | 5.38E-05 | 2.24E-06 | −0.43 | −0.31 | 2 |
| 3.2 | 100 | 6.54 | 5.44E-06 | 4.98E-06 | −0.48 | −0.16 | 2 |
| 10 | 100 | 6.36 | 5.45E-05 | 1.11E-05 | −0.55 | −0.01 | 2 |
| 100.0 | 100 | 6.04 | 5.39E-05 | 5.10E-05 | −0.75 | 0.29 | 2 |
T = total concentration.
Model 1 = Initial equilibration with atmospheric CO2 followed by equilibration with minerals.
Model 2 = Equilibration with CO2 and minerals simultaneously.