Table 1.
Location and properties of the sample sites (average of 2 measured values is shown, unless the values differed by more than 20%, in which case both values are shown)
| E2-Anemone field | E2-Crab city | E9 South-Marshland | E9 North-Black&White | Seawater1 | |
|---|---|---|---|---|---|
| Latitude | 56°5.31 S | 56°4.80 S | 60°2.79 S | 60°02.57 S | |
| Longitude | 30°19.07 W | 30°18.60 W | 29°58.71 W | 29°58.92 W | |
| Depth (m) | 2597 | 2641 | 2402 | 2400 | |
| Measurements in the diffuse flow near Kiwa | |||||
| pH | 7.59 | 6.39 | 7.37/5.91 | 5.96 | 7.5–8.4 |
| Temperature (°C) | 3.5 | 20 | 5/20 | 11 | ∼0 |
| H2S (mmol/L) | 0 | 0.12 | 0/0.1 | 0.1 | <0.000002 |
| SO4 (mmol/L) | 27.2 | 26.5 | 26.7 | 27.6 | 28 |
| Cl (mmol/L) | 531 | 541 | 525 | 539 | 546 |
| Mg (mmol/kg) | 52.7 | 49.9 | 51.5 | 52.0 | 52.7 |
| Mn (μmol/kg) | 9.76 | 92.9 | 0.82/18.9 | 4.18 | 0.00036 |
| Fe (μmol/kg) | 2.17 | 4.13 | 1.2/5.4 | 5.57 | 0.0005 |
| E2–Dog'sHead | E2-Sepia | E9 South – Ivory Tower | E9 North- Black&White | |
|---|---|---|---|---|
| Measurements in the end-member fluid of the nearest vent chimney | ||||
| pH | 3.02 | 3.05 | 3.08 | 3.42 |
| Temperature (°C) | 351 | 353 | 348 | 383 |
| H2S (mmol/L) | 6.7 | 7.1 | 11 | 9.5 |
| Cl (mmol/L) | 536 | 532 | 220 | 98.2 |
| Mn (μmol/kg) | 2050 | 2060 | 508 | 199 |
| Fe (μmol/kg) | 1280 | 1010 | 2520 | 800 |
1
Average values in seawater. Source: http://www.mbari.org/chemsensor/pteo.htm).