TABLE 3.
Chemical compositions of different anoxic deep-sea brines and oxygenated seawater
| Brine or seawater | Salinity (‰) | pH | O2 concn (μM) | H2S concn (mM) | SO42− concn (mM) | PO43 concn (μM) | NH4+ concn (μM) | Ca2+ concn (mM) | Cl− concn (mM) | References |
|---|---|---|---|---|---|---|---|---|---|---|
| Urania basin | 200 | 6.8 | 0 | 8.6–11 | 85 | 41.2 | NDa | 34 | 2,830 | 20, 58; this study; Ziebis et al.b |
| Libeccio basin (Bannock area) | 321 | 6.5 | 0 | 1.67 | 99 | 12 | 3,080 | 21 | 5,333 | 8, 16 |
| Tyro basin | ND | 6.75 | 0 | 2.15 | 49 | 10 | 1,260 | 34 | 5,350 | 8, 16 |
| Orca basin (Gulf of Mexico) | 258.1 | 5.5 | 0 | 0.60 | 47.1 | 82 | 500 | 32 | 5,000 | 16, 51 |
| Oxygenated seawater (eastern Mediterranean) | 39 | 8.2 | 200 | 0 | 31 | 0.2 | 0.2 | 11 | 660 | 8, 58 |
a
ND, not determined.
b
Ziebis et al., J. Conf. Abstr. Goldschmidt Conf. 2000. Mean values were calculated for the upper brine layers (depth, 3,490 to 3,520 m) in this study.