|
Core, section,
interval (cm) |
Depth
(mbsf) |
C1
(ppmv) |
CO2
(ppmv) |
C2=
(ppmv) |
C2
(ppmv) |
C3=
(ppmv) |
C3
(ppmv) |
C1/C2
|
|---|---|---|---|---|---|---|---|---|
| 175-1085A- | ||||||||
| 1H-2, 0-5 | 1.50 | 7 | 2,392 |
|
|
|
|
|
| 2H-2, 0-5 | 5.20 | 7 | 4,628 |
|
|
|
|
|
| 2H-4, 0-5 | 8.20 | 9 | 6,672 |
|
|
|
|
|
| 3H-4, 0-5 | 17.70 | 26 | 17,784 |
|
|
|
|
|
| 4H-4, 0-5 | 27.20 | 64 | 20,016 |
|
0.6 |
|
|
107 |
| 5H-4, 0-5 | 36.70 | 117 | 23,091 | 0.2 | 0.7 |
|
|
167 |
| 6H-4, 0-5 | 46.20 | 2,764 | 29,048 |
|
1.0 |
|
|
2,764 |
| 7H-4, 0-5 | 55.70 | 8,582 | 23,189 |
|
1.3 |
|
|
6,602 |
| 8H-4, 0-5 | 65.20 | 17,790 | 25,881 |
|
1.7 |
|
|
10,465 |
| 9H-4, 0-5 | 74.70 | 26,232 | 27,683 |
|
2.4 |
|
1.1 | 10,930 |
| 10H-4, 0-5 | 84.20 | 33,380 | 34,462 | 0.2 | 3.0 |
|
1.6 | 11,127 |
| 11H-4, 0-5 | 93.70 | 38,038 | 28,479 |
|
2.9 |
|
1.3 | 13,117 |
| 12H-4, 0-5 | 103.20 | 31,004 | 28,883 | 0.2 | 2.9 |
|
1.5 | 10,691 |
| 13H-4, 0-5 | 112.70 | 35,653 | 37,844 | 0.2 | 3.0 |
|
1.2 | 11,884 |
| 14H-4, 0-5 | 122.20 | 36,634 | 27,943 |
|
2.7 |
|
1.1 | 13,568 |
| 15H-4, 0-5 | 131.72 | 30,948 | 34,945 | 0.2 | 3.0 |
|
1.6 | 10,316 |
| 16H-3, 0-5 | 139.70 | 19,668 | 28,157 | 0.2 | 2.2 |
|
1.4 | 8,940 |
| 17H-5, 0-5 | 150.92 | 28,008 | 32,271 | 0.2 | 2.8 | 0.2 | 1.5 | 10,003 |
| 18H-4, 0-5 | 160.20 | 28,507 | 34,197 | 0.2 | 3.0 | 0.1 | 1.7 | 9,502 |
| 19H-7, 85-90 | 175.05 | 26,403 | 33,448 | 0.3 | 3.2 | 0.2 | 1.9 | 8,251 |
| 20H-7, 28-33 | 183.78 | 47,987 | 46,381 | 0.5 | 4.6 | 0.3 | 2.5 | 10,432 |
| 21H-4, 0-5 | 188.70 | 18,051 | 34,803 | 0.2 | 2.0 | 0.1 | 1.2 | 9,026 |
| 22H-7, 66-71 | 203.36 | 21,839 | 32,758 | 0.3 | 2.3 |
|
1.6 | 9,495 |
| 23H-7, 77-82 | 212.97 | 23,319 | 29,861 | 0.5 | 2.5 | 0.2 | 1.2 | 9,328 |
| 24H-4, 0-5 | 217.30 | 29,346 | 38,544 | 0.5 | 3.3 | 0.2 | 1.8 | 8,893 |
| 25H-6, 124-129 | 230.94 | 25,679 | 31,684 | 0.4 | 3.0 | 0.2 | 1.6 | 8,560 |
| 26H-7, 41-46 | 239.71 | 30,927 | 29,179 | 0.4 | 3.1 | 0.1 | 1.4 | 9,976 |
| 27H-4, 0-5 | 245.70 | 25,054 | 31,358 | 0.6 | 3.2 | 0.3 | 1.9 | 7,829 |
| 28H-6, 112-117 | 259.32 | 21,537 | 30,722 | 0.5 | 3.6 | 0.3 | 2.5 | 5,983 |
| 29H-7, 30-35 | 269.50 | 40,072 | 23,575 | 0.4 | 4.9 | 0.2 | 3.0 | 8,178 |
| 31H-4, 0-5 | 283.70 | 43,091 | 25,762 | 0.5 | 4.3 |
|
1.7 | 10,021 |
| 32H-6, 0-5 | 295.85 | 40,622 | 28,930 | 1.0 | 4.5 | 0.5 | 2.2 | 9,027 |
| 33H-5, 0-5 | 304.20 | 47,651 | 28,031 | 1.0 | 6.0 |
|
3.6 | 7,942 |
| 34X-4, 0-5 | 309.50 | 18,497 | 15,676 | 0.2 | 2.1 |
|
1.0 | 8,808 |
| 35X-7, 0-5 | 322.80 | 6,342 | 12,281 | 0.4 | 1.3 |
|
0.9 | 4,878 |
| 36X-6, 0-5 | 331.90 | 15,314 | 11,073 | 0.4 | 2.3 |
|
1.5 | 6,658 |
| 37X-4, 0-5 | 338.50 | 24,245 | 14,583 | 0.4 | 2.8 |
|
1.5 | 8,659 |
| 38X-6, 0-5 | 351.20 | 34,696 | 21,055 | 0.5 | 4.1 |
|
2.2 | 8,462 |
| 39X-6, 0-5 | 360.90 | 39,962 | 16,362 | 0.4 | 3.9 |
|
1.6 | 10,247 |
| 40X-4, 0-5 | 367.50 | 19,590 | 12,811 | 0.2 | 1.9 |
|
0.8 | 10,311 |
| 41X-6, 0-5 | 380.20 | 29,843 | 17,753 | 0.2 | 2.9 |
|
1.1 | 10,291 |
| 42X-6, 0-5 | 389.90 | 28,115 | 12,426 | 0.4 | 3.1 |
|
1.5 | 9,069 |
| 43X-4, 0-5 | 396.60 | 35,492 | 17,238 | 0.2 | 3.5 |
|
1.4 | 10,141 |
| 44X-6, 0-5 | 409.30 | 17,471 | 10,626 | 0.2 | 2.2 |
|
1.0 | 7,941 |
| 45X-6, 0-5 | 419.00 | 25,466 | 8,499 | 0.4 | 2.8 |
|
1.1 | 9,095 |
| 46X-4, 0-5 | 425.60 | 18,870 | 6,068 | 0.2 | 2.1 |
|
0.7 | 8,986 |
| 47X-6, 0-5 | 438.20 | 17,118 | 750 | 0.6 | 2.1 | 0.5 | 1.1 | 8,151 |
| 48X-6, 0-5 | 447.83 | 16,471 | 4,931 | 0.3 | 1.9 | 0.3 | 0.9 | 8,669 |
| 49X-4, 0-5 | 454.50 | 25,768 | 5,165 | 0.4 | 2.5 | 0.3 | 0.9 | 10,307 |
| 50X-5, 0-5 | 465.70 | 28,038 | 4,104 | 0.7 | 2.8 | 0.6 | 1.0 | 10,014 |
| 51X-5, 0-5 | 474.90 | 53,132 | 1,283 | 0.6 | 4.6 | 0.6 | 1.5 | 11,550 |
| 52X-4, 0-5 | 483.00 | 29,376 | 1,637 | 0.4 | 2.5 | 0.6 | 0.9 | 11,750 |
| 53X-5, 0-5 | 494.11 | 42,589 | 766 | 0.4 | 3.3 | 0.7 | 0.9 | 12,906 |
| 54X-5, 0-5 | 503.90 | 34,780 | 2,566 | 0.8 | 2.8 | 0.6 | 0.9 | 12,421 |
| 55X-4, 0-5 | 512.10 | 49,757 | 3,466 | 0.2 | 3.3 | 0.6 | 1.0 | 15,078 |
| 56X-4, 0-5 | 521.70 | 33,765 | 2,080 | 0.3 | 2.4 | 0.5 | 0.6 | 14,069 |
| 57X-4, 0-5 | 531.40 | 19,542 | 945 | 0.2 | 1.3 | 0.2 | 0.2 | 15,032 |
| 58X-4, 0-5 | 541.10 | 46,725 | 1,258 | 0.1 | 2.5 |
|
0.3 | 18,690 |
| 59X-6, 0-5 | 553.62 | 7,386 | 1,288 | 0.2 | 0.4 | 0.1 |
|
18,465 |
| 60X-6, 0-5 | 563.30 | 5,128 | 1,712 | 0.2 | 0.3 |
|
|
17,093 |
| 61X-4, 0-5 | 570.00 | 24,643 | 1,256 | 0.1 | 1.0 |
|
|
24,643 |
| 62X-5, 0-5 | 581.10 | 28,461 | 590 |
|
0.8 |
|
|
35,576 |
| 63X-6, 0-5 | 592.20 | 16,998 | 1,513 |
|
0.4 |
|
|
42,495 |
| 64X-4, 0-5 | 598.90 | 10,831 | 1,115 |
|
0.3 |
|
|
36,103 |
Notes: C1 = methane; CO2 = carbon dioxide; C2= = ethene; C2 = ethane; C3= = propene; and C3 = propane. Dominance of C1 over C2 indicates that the gases originate from in situ microbial degradation of organic matter.