Table 1.
Key geochemical characteristicsa, temperature values and sample depths of sublacustrine thermal vent waters (and lake water from the Southeast Arm) obtained from Yellowstone Lake using the remotely operated vehicle (ROV) during September 2007 and 2008.
| Sample | Depth | Temp | pH | DICa CO2 (aq)b | DSa | O2(aq)b | CH4 (aq)b | H2 (aq)b | Sample | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Location | m | °C | mM | μM | nM | IDc | Date | ||||
| Inflated Plain | 30 | 92–94 | 5.6 | 8.5 | 8.1 | 633 | bd | 21.8 | 414 | 329-Sy-1 | 9/9/2007 |
| 32 | 70–76 | 5.6 | 4.1 | 3.2 | 463 | 25 | 21.2 | 4837 | 330-Sy-1 | 9/10/2007 | |
| 32 | 40–45 | 5.2 | 3.1 | 3.1 | 230 | bd | 20.9 | 1031 | 348-Sy-P | 9/11/2008 | |
| 30 | 40–60 | 5.2 | 3.2 | 3.2 | 266 | bd | 22.5 | 1430 | 348-Sy-S | 9/11/2008 | |
| 33.6 | 44–52 | 5.5 | 1.2 | 1.2 | 85 | 25 | 6.7 | 1023 | 359-VC | 9/16/2008 | |
| 33.6 | 41–49 | 5.7 | 1.1 | 1.1 | 111 | bd | 5.4 | 1974 | 359-Sy-S | 9/16/2008 | |
| West Thumb | 52 | 60–66 | 6.2 | 4.7 | 1.6 | 2 | 113 | 6.4 | 41 | 339-VC | 9/18/2007 |
| Deep Vent | 52 | 60–66 | 6.2 | ndd | 1.8 | bde | bd | 7.2 | 63 | 339-Sy | 9/18/2007 |
| 52 | 60-76 | 6.2 | 1.3 | 0.4 | 1 | bd | 14.5 | 30 | 341-Sy-1 | 9/19/2007 | |
| 54 | 66 | 6.1 | 2.5 | 1.0 | 8 | 188 | 4.6 | 102 | 343-Sy-1 | 9/19/2007 | |
| 53.2 | 40-53 | 6.1 | nd | 2.1 | 10 | 147 | 5.6 | 23 | 369-VC | 9/20/2008 | |
| 53.2 | 38 | 5.9 | nd | 2.0 | 10 | 238 | 6.8 | 33 | 369-Sy-P | 9/20/2008 | |
| 53.2 | 62-66 | 5.9 | nd | 3.0 | 13 | 210 | 10.5 | 41 | 369-Sy-S | 9/20/2008 | |
| Mary Bay | 49.6 | 30-57 | 5.1 | 4.0 | 3.3 | 172 | bd | 13.7 | 454 | 335-Sy-S | 9/16/2007 |
| 52.3 | 62-66 | 5.1 | 6.4 | 4.5 | 385 | bd | 17.9 | 511 | 336-Sy-1 | 9/16/2007 | |
| 52.3 | 73-74 | 5.1 | 5.9 | 6.0 | 433 | bd | 20.4 | 100 | 336-Sy-2 | 9/16/2007 | |
| 50.5 | 65-70 | 5.0 | 3.8 | 3.8 | bd | bd | 28.1 | 2984 | 349-Sy-P | 9/12/2008 | |
| 50.5 | 62-70 | 5.4 | 1.8 | 1.8 | 123 | 94 | 12.4 | 2797 | 349-Sy-S | 9/12/2008 | |
| Elliot's Crater | 14.1 | 71 | 6.4 | 1.4 | 0.5 | 43 | 202 | 4.4 | 688 | 351-Sy-S | 9/13/2008 |
| 14.1 | 71 | 6.2 | 1.6 | 0.7 | 54 | 190 | 1.9 | 672 | 351-Sy-P | 9/13/2008 | |
| 14.1 | 63-68 | 6.4 | 1.3 | 0.5 | 40 | 120 | 2.3 | 660 | 352-VC | 9/14/2008 | |
| West Thumb | 4.3 | 65-70 | 8.4 | 0.8 | 0.0 | bd | 47 | 2.1 | 551 | 332-Sy | 9/11/2007 |
| Otter Vent | 4.3 | 63-68 | 8.4 | 0.7 | 0.0 | bd | 26 | 0.1 | 43 | 333-VC | 9/12/2007 |
| Southeast Arm | 2.5 | 10.6 | 7.0 | 0.6 | 0.013 | bd | 234 | 0.1 | 10 | 344 | 9/20/2007 |
| 3 | 11 | 7.0 | 0.6 | 0.014 | bd | 313 | 0.2 | 47 | 354 | 9/15/2008 | |
| 17 | 10.5 | 7.1 | 0.6 | 0.019 | bd | 344 | 0.1 | 23 | 356 | 9/15/2008 | |
a
DIC, dissolved inorganic C; DS, dissolved sulfide; other constituents given in Table S1.
b
Dissolved gas species determined using headspace GC, aq, aqueous.
c
Sy, ROV syringe, P, port side, S, starboard side, VC, vent carboy/peristaltic pump.
d
nd, not determined.
e
bd, below detection; detection limit DS = 0.3 μM; O2 = 3 μM.