|
Core, section,
interval (cm) |
Depth
(mbsf) |
C1
(ppmv) |
CO2
(ppmv) |
C2
(ppmv) |
C1/C2
|
|---|---|---|---|---|---|
| 175-1086A- | |||||
| 1H-4, 0-5 | 4.50 | 6 | 5,348 |
|
|
| 2H-4, 0-5 | 11.20 | 6 | 4,624 |
|
|
| 3H-4, 0-5 | 20.70 | 10 | 7,032 |
|
|
| 4H-4, 0-5 | 30.20 | 12 | 8,106 | 0.2 | 59 |
| 5H-4, 0-5 | 39.70 | 15 | 7,558 | 0.2 | 74 |
| 6H-4, 0-5 | 49.20 | 17 | 11,755 | 0.3 | 57 |
| 7H-4, 0-5 | 58.70 | 25 | 14,382 | 0.6 | 42 |
| 8H-4, 0-5 | 68.10 | 26 | 14,355 | 0.6 | 44 |
| 9H-4, 0-5 | 77.60 | 31 | 14,779 | 0.5 | 62 |
| 10H-4, 0-5 | 87.10 | 34 | 15,001 | 0.5 | 68 |
| 11H-4, 0-5 | 96.70 | 37 | 15,400 | 0.5 | 74 |
| 12H-7, 0-5 | 110.70 | 35 | 12,886 | 0.4 | 87 |
| 13H-7, 0-5 | 120.20 | 44 | 14,959 | 0.6 | 74 |
| 14H-4, 0-5 | 125.20 | 42 | 12,175 | 0.4 | 105 |
| 15H-7, 0-5 | 139.20 | 40 | 14,681 | 0.4 | 100 |
| 16H-7, 0-5 | 148.70 | 41 | 11,721 | 0.3 | 136 |
| 17H-4, 0-5 | 153.70 | 58 | 14,264 | 0.5 | 117 |
| 18H-7, 0-5 | 167.70 | 80 | 17,337 | 0.6 | 133 |
| 19H-7, 0-5 | 177.20 | 88 | 19,383 | 0.6 | 137 |
| 20H-4, 0-5 | 182.20 | 101 | 17,731 | 0.6 | 168 |
| 21H-7, 0-5 | 196.20 | 64 | 10,655 | 0.3 | 214 |
| 22H-4, 0-5 | 201.20 | 89 | 16,162 | 0.4 | 222 |
Notes: C1 = methane; CO2 = carbon dioxide; and C2 = ethane. Dominance of C1 over C2 indicates that the gases originate from in situ microbial degradation of organic matter.