Table 1.
Index of all graphitic particles identified and characterized via transmission electron microscopy
| ID | Vent | Sample type | Temperature (°C) | Latitude | Longitude | Fe (II) (μm) | Total reduced S (μm) | Longest dimension (μm) | Stokes settling velocity (m yr−1) |
|---|---|---|---|---|---|---|---|---|---|
| A | Biovent | End-member | 335 | 9° 50.96′ N | 104° 17.62′ W | 338 ± 3.05 | 5170 ± 855 | 6.55 | 470 |
| B | Biovent | End-member | 335 | 9° 50.96′ N | 104° 17.62′ W | 338 ± 3.05 | 5170 ± 855 | 2.40 | 63.2 |
| C | Biovent | Plume | 15 | 9° 50.97′ N | 104° 17.62′ W | 7.80 ± 0.19 | 159 ± 29.2 | 7.19 | 567 |
| D | Biovent | Plume | 15 | 9° 50.97′ N | 104° 17.62′ W | 7.80 ± 0.19 | 159 ± 29.2 | 6.46 | 458 |
| E | Biovent | Plume | 15 | 9° 50.97′ N | 104° 17.62′ W | 7.80 ± 0.19 | 159 ± 29.2 | 0.35 | 1.35 |
| F | Biovent | Plume | 15 | 9° 50.97′ N | 104° 17.62′ W | 7.80 ± 0.19 | 159 ± 29.2 | 0.78 | 6.74 |
| G | P vent | Plume | 15 | 9° 50.28′ N | 104° 17.47′ W | 36.3 ± 0.35 | 42.2 ± 14.4 | 0.59 | 3.84 |
| H | P vent | Plume | 15 | 9° 50.28′ N | 104° 17.47′ W | 36.3 ± 0.35 | 42.2 ± 14.4 | 1.05 | 12.1 |
| I | Q vent | Low °T | 35 | 9° 50.73′ N | 104° 17.59′ W | 393 ± 5.05 | 249 ± 49.0 | 1.40 | 21.5 |
Sample location as well as iron (Fe) and reduced sulfur (S) (average and standard deviation of three analyses) in unfiltered fluids are provided for geochemical context (see methods). All Fe was measured as Fe(II), either dissolved or present in sulfide phases; statistically significant concentrations of Fe(III) were not detected. A maximum estimated Stokes settling velocity for each particle was calculated from the longest measured dimension