Table T21. Mass balance in sulfate reduction zone, Site U1351.
| Process | Ions (mM) | ||
|---|---|---|---|
| Surface | 16–20 m | Change | |
| Generation of bicarbonate during sulfate reduction (alkalinity increase) | 2.9 | 10.1 | 7.2 |
| Precipitation of Ca2+ as carbonate (Ca2+ removal) | 10.8 | 5.3 | 5.5 |
| Precipitation of Mg2+ as carbonate (Mg2+ removal) | 52.3 | 35.1 | 17.2 |
| Total bicarbonate generated: | 29.9 | ||
| Sulfate reduction and removal | 28 | 0 | 28 |
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