Table 1.
Characteristics of the studied sites.
| Sample # | Volcano | Sampling Site | pH | Salinity, g L−1 | Eh, mV |
CH4, mM | Cl−, mM | PO4−, mM | SO42−, mM | NO3−, mM |
|---|---|---|---|---|---|---|---|---|---|---|
| C01 | Gnilaya Gora | Gryphon | 8.47 | 20 | −295 | 101.1 | 241.1 | 0.00 | 5.79 | 0.00 |
| C02 | Gnilaya Gora | Gryphon | 8.66 | 14 | −175 | 556.7 | 158.8 | 0.07 | 1.07 | 0.00 |
| C03 | Gnilaya Gora | Salsa | 9.10 | 20 | −320 | 201.1 | 412.0 | 0.00 | 0.00 | 0.00 |
| C04 | Gnilaya Gora | Mud pool | 8.64 | 12 | −348 | 536.3 | 162.8 | 0.02 | 0.09 | 0.92 |
| C05 | Gnilaya Gora | Mud pool | 8.94 | 20 | −302 | 47.7 | 216.1 | 0.00 | 1.95 | 0.00 |
| C10 | Gladkovsky | Mud pool | 6.75 | 20 | −124 | 668.0 | 307.5 | 0.00 | 0.06 | 0.00 |
| C11 | Gladkovsky | Mud pool | 6.72 | 20 | −110 | 661.5 | 300.8 | 0.00 | 0.08 | 0.00 |
| C12 | Gladkovsky | Mud pool | 7.07 | 30 | 15 | 3.3 | 402.2 | 0.00 | 0.00 | 0.00 |
| C13 | Gladkovsky | Mud pool | 7.08 | 30 | −255 | 105.9 | 393.4 | 0.00 | 0.00 | 0.00 |
| C14 | Gladkovsky | Mud pool | 7.02 | 20 | −217 | 439.1 | 291.2 | 0.00 | 0.00 | 0.00 |
| C16 | Kuchugursky | Main crater | 7.43 | 15 | −212 | 640.5 | 153.9 | 0.00 | 8.54 | 0.00 |
| C17 | Kuchugursky | Mud pool | 6.92 | 20 | nd | nd | 147.4 | 0.00 | 63.52 | 0.00 |
| C19 | Semigorsky | Mud pool | 8.20 | 10 | nd | nd | 5.7 | 0.00 | 0.08 | 0.00 |
| C20 | Semigorsky | Mud pool | 8.35 | 9 | nd | nd | 37.2 | 0.00 | 0.02 | 0.00 |
| C21 | Shugo | Gryphon | 7.23 | 20 | −196 | 456.8 | 199.2 | 0.00 | 0.20 | 0.00 |
| C23 | Shugo | Gryphon | 6.94 | 12 | nd | nd | 95.4 | 0.00 | 0.21 | 0.00 |
| C24 | Shugo | Gryphon | 7.41 | 20 | −157 | 917.3 | 193.7 | 0.00 | 0.21 | 0.00 |
nd—not determined.