|
Core, section,
interval (cm) |
Depth
(mbsf) |
C1
(ppmv) |
CO2
(ppmv) |
C2=
(ppmv) |
C2
(ppmv) |
C3
(ppmv) |
C1/C2
|
|---|---|---|---|---|---|---|---|
| 175-1080A- | |||||||
| 1H-2, 0-5 | 1.50 | 2 | 864 |
|
|
|
|
| 1H-3, 0-5 | 3.00 | 7.4 | 1,893 |
|
|
|
|
| 2H-2, 0-5 | 4.80 | 228 | 9,058 | 0.2 | 2.1 |
|
109 |
| 2H-3, 0-5 | 6.30 | 4,352 | 14,123 | 0.3 | 4.5 |
|
967 |
| 2H-4, 0-5 | 7.80 | 13,099 | 18,397 | 0.6 | 7.2 | 0.8 | 1,819 |
| 2H-5, 0-5 | 9.30 | 20,309 | 12,152 | 0.7 | 8.5 | 1.2 | 2,389 |
| 2H-6, 0-5 | 10.80 | 31,121 | 13,778 | 0.2 | 10.9 | 1.3 | 2,855 |
| 3H-2, 0-5 | 14.35 | 11,025 |
|
1.0 | 6.0 | 1.5 | 1,838 |
| 3H-3, 0-5 | 15.90 | 6,842 | 18,213 | 1.7 | 6.8 | 3.0 | 1,006 |
| 3H-4, 0-5 | 17.45 | 10,556 |
|
0.3 | 6.8 | 2.1 | 1,552 |
| 3H-5, 0-5 | 19.00 | 5,485 | 11,171 | 0.5 | 4.1 | 1.1 | 1,338 |
| 3H-6, 0-5 | 20.55 | 9,351 |
|
0.3 | 6.0 | 1.8 | 1,558 |
| 3H-7, 0-5 | 22.10 | 12,959 | 9,367 | 0.4 | 8.2 | 2.5 | 1,580 |
| 4H-3, 0-5 | 24.14 | 6,827 |
|
0.3 | 5.0 | 1.9 | 1,365 |
| 4H-4, 0-5 | 25.64 | 6,684 | 10,766 | 0.4 | 3.6 | 1.0 | 1,857 |
| 4H-6, 0-5 | 27.30 | 7,158 |
|
0.5 | 6.0 | 2.3 | 1,193 |
| 4H-8, 0-5 | 28.91 | 4,458 |
|
1.4 | 5.1 | 2.6 | 874 |
| 4H-10, 0-5 | 30.71 | 6,333 | 15,641 | 0.9 | 7.1 | 3.7 | 892 |
| 4H-12, 0-5 | 32.41 | 16,069 |
|
0.8 | 10.9 | 3.7 | 1,474 |
| 5H-3, 0-5 | 34.02 | 4,999 | 16,914 | 1.2 | 4.8 | 2.6 | 1,041 |
| 5H-5, 0-5 | 36.10 | 6,021 |
|
1.2 | 3.9 | 3.0 | 1,544 |
| 5H-7, 0-5 | 38.50 | 6,220 | 20,790 | 1.3 | 3.6 | 3.1 | 1,728 |
| 5H-8, 0-5 | 39.70 | 7,196 |
|
1.8 | 4.6 | 4.1 | 1,564 |
| 5H-9, 0-5 | 40.90 | 8,257 | 24,275 | 1.1 | 3.6 | 3.3 | 2,294 |
| 5H-10, 0-5 | 42.10 | 6,611 |
|
0.1 | 4.4 | 2.9 | 1,502 |
| 6H-3, 0-5 | 43.14 | 5,787 | 29,362 | 1.1 | 5.0 | 6.9 | 1,157 |
| 6H-5, 0-5 | 45.54 | 9,881 |
|
1.1 | 6.4 | 7.0 | 1,544 |
| 6H-6, 0-5 | 46.94 | 11,664 |
|
1.4 | 16.1 | 4.5 | 7,24 |
| 6H-7, 0-5 | 48.34 | 10,759 | 30,280 | 1.0 | 6.4 | 5.7 | 1,681 |
| 6H-8, 0-5 | 49.74 | 7,458 | 24,423 | 0.2 | 3.5 | 3.0 | 2,131 |
Notes: C1 = methane; CO2 = carbon dioxide; C2= = ethene; C2 = ethane; and C3 = propane. Dominance of C1 over C2 indicates that the gases originate from in situ microbial degradation of organic matter.