Table 1.
Measured aqueous species abundances in mixing zones at the Piccard vent field
| Vent (year)/sample* | Tmax, °C | Mg, mm | pH, 25 °C | Ca, mm | SO4, mm | Fe, mm | ΣHCOOH, μm |
| Beebe endmember† | 0 | —‡ | 6.18 | 0.21 | 6.58 | − | |
| Hot Chimlet 1 (2012) | |||||||
| J2-619-IGT6 | 149 | 35.4 | 5.1 | 7.15 | 15.2 | 0.85 | 54 |
| J2-619-IGT3 | 147 | 33.4 | 5.0 | 6.93 | 13.8 | —§ | 58 |
| Hot Chimlet 1 (2013) | |||||||
| N59-IGT6 | 81 | 41.5 | 5.8 | 10.4 | 20.7 | 0.50 | 13 |
| N59-IGT4 | 85 | 50.4 | 6.3 | 10.3 | 26.4 | 0.17 | <1.0 |
| Hot Chimlet 3 (2013) | |||||||
| N62-IGT8 | 101 | 47.1 | 6.0 | 10.3 | 24.7 | —§ | 55 |
| N62-IGT7 | 97 | 35.1 | 5.4 | 10.2 | 16.6 | 0.35 | 167 |
| Hot Chimlet 2 (2012) | |||||||
| J2-620-IGT4 | 95 | 45.4 | 5.7 | 9.35 | 24.2 | 0.15 | 16 |
| J2-620-IGT8 | 87 | 47.8 | 5.9 | 9.75 | 23.1 | 0.16 | 12 |
| Shrimp Gulley 1 (2012) | |||||||
| J2-620-IGT1 | 111 | 42.4 | 5.5 | 9.67 | 22.6 | 1.89 | 24 |
| J2-620-IGT2 | 104 | 44.8 | 5.6 | 10.1 | 22.8 | 1.58 | 18 |
| Shrimp Gulley 3 (2013) | |||||||
| N63-IGT6 | 80 | 47.9 | 5.8 | 10.1 | 24.6 | 2.56 | <1.0 |
| Shrimp Gulley 2 (2012) | |||||||
| J2-618-IGT1 | 45 | 47.4 | 6.0 | 10.2 | 25.4 | 0.091 | 9.4 |
| J2-618-IGT3 | 44 | 48.9 | 5.9 | 10.1 | 25.2 | 0.11 | 8.8 |
| Bottom seawater | ∼5 | 52.5 | 8.0 | 10.3 | 28.0 | 0.0 | <1.0 |
Jason (J2) or Nereus (N##) dive number and isobaric gas-tight sampler number (-IGT).
Average high-temperature vent endmember [for Beebe 1, 3, 5, and Beebe Woods; McDermott et al. (25)]. See McDermott et al. (25) for IGT data from high-temperature fluid samples.
Lowest measured pH for high-temperature source fluids: 3.1 (Beebe Vent 1, 2012); 3.2 (Beebe Vent 3, 2012); 3.0 (Beebe Vent 5, 2012); 3.2 (Beebe Vent 5, 2013); 3.2 (Beebe Woods, 2012); from McDermott et al. (25).
A dregs aliquot was not collected for sample J2-619-IGT3 or N62-IGT8. The dregs aliquot is composed of particles remaining in the IGT sampler following extraction of the aqueous sample; see Methods and Materials.