|
Core, section,
interval (cm) |
Depth
(mbsf) |
C1
(ppmv) |
CO2
(ppmv) |
C2=
(ppmv) |
C2
(ppmv) |
H2S
(ppmv) |
C3=
(ppmv |
C3
(ppmv) |
C1/C2
|
|---|---|---|---|---|---|---|---|---|---|
| 175-1082A- |
|
|
|
|
|
|
|
|
|
| 1H-2, 0-5 | 1.50 | 3 | 1,513 |
|
|
14 |
|
|
|
| 1H-3, 0-5 | 3.00 | 6 | 3,397 | 0.7 | 0.7 | 20 |
|
0.3 | 8 |
| 1H-4, 0-5 | 4.50 | 118 | 24,581 | 1.4 | 1.4 |
|
|
1.0 | 84 |
| 1H-5, 0-5 | 6.00 | 13 | 29,513 | 1.3 | 0.9 |
|
|
0.7 | 14 |
| 2H-3, 0-5 | 10.80 | 35 | 12,862 | 0.1 | 0.5 | 15 |
|
|
70 |
| 2H-4, 0-5 | 12.20 | 322 | 43,198 | 1.1 | 1.3 |
|
|
0.5 | 248 |
| 2H-5, 0-5 | 13.60 | 116 | 49,725 | 2.1 | 2.1 |
|
|
1.5 | 55 |
| 2H-6, 0-5 | 15.00 | 150 | 43,534 | 2.7 | 2.8 |
|
0.7 | 1.2 | 54 |
| 2H-7, 0-5 | 16.40 | 247 | 61,950 | 1.8 | 2.4 |
|
|
0.7 | 103 |
| 3H-2, 0-5 | 18.70 | 800 | 75,504 | 1.5 | 2.9 |
|
|
0.8 | 276 |
| 3H-3, 0-5 | 20.10 | 2,955 | 28,480 |
|
1.0 |
|
|
|
2,955 |
| 3H-4, 0-5 | 21.50 | 9,351 | 81,913 | 2.8 | 5.2 |
|
0.7 | 1.3 | 1,798 |
| 3H-5, 0-5 | 22.90 | 20,113 | 81,120 | 2.8 | 6.3 |
|
|
2.8 | 3,193 |
| 3H-6, 0-5 | 24.30 | 28,728 | 110,359 | 0.8 | 4.8 | 19 |
|
1.0 | 5,985 |
| 3H-7, 0-5 | 25.70 | 36,760 | 130,824 | 1.5 | 5.9 |
|
|
1.6 | 6,231 |
| 4H-2, 0-5 | 28.20 | 21,630 | 58,284 | 0.5 | 3.2 |
|
|
0.8 | 6,759 |
| 4H-3, 0-5 | 29.60 | 25,500 | 38,120 | 0.2 | 2.8 | 22 |
|
0.6 | 9,107 |
| 4H-4, 0-5 | 31.00 | 31,592 | 82,381 | 0.8 | 3.8 |
|
|
0.9 | 8,314 |
| 4H-5, 0-5 | 32.40 | 36,693 | 52,156 | 1.7 | 5.7 |
|
|
2.4 | 6,437 |
| 4H-6, 0-5 | 33.80 | 83,199 | 83,032 | 3.0 | 9.9 |
|
0.8 | 3.3 | 8,404 |
| 4H-7, 0-5 | 35.20 | 70,468 | 81,325 | 3.1 | 9.2 |
|
0.9 | 3.3 | 7,660 |
| 5H-2, 0-5 | 37.70 | 19,558 | 92,638 | 0.7 | 2.9 |
|
|
0.9 | 6,744 |
| 5H-3, 0-5 | 39.10 | 14,987 | 43,427 |
|
1.9 |
|
|
0.4 | 7,888 |
| 5H-4, 0-5 | 40.50 | 21,938 | 79,215 | 2.1 | 4.8 |
|
0.6 | 2.2 | 4,570 |
| 5H-5, 0-5 | 41.90 | 19,813 | 55,020 | 2.8 | 5.3 |
|
0.8 | 2.8 | 3,738 |
| 5H-6, 0-5 | 43.30 | 26,379 |
|
3.8 | 7.0 |
|
1.0 | 3.8 | 3,752 |
| 5H-7, 0-5 | 44.70 | 36,019 | 86,842 | 3.5 | 8.4 |
|
1.0 | 4.4 | 4,288 |
| 6H-2, 0-5 | 47.20 | 10,934 | 120,700 | 1.5 | 4.6 |
|
0.1 | 2.2 | 2,377 |
| 6H-3, 0-5 | 48.60 | 9,988 | 34,462 | 0.3 | 2.5 |
|
|
0.6 | 3,995 |
| 6H-4, 0-5 | 50.00 | 11,363 | 106,911 | 3.2 | 7.0 |
|
0.4 | 4.5 | 1,623 |
| 6H-5, 0-5 | 51.40 | 13,438 | 86,175 | 4.6 | 10.4 |
|
1.4 | 7.2 | 1,292 |
| 6H-6, 0-5 | 52.80 | 13,130 |
|
1.2 | 4.9 |
|
0.3 | 2.1 | 2,680 |
| 6H-7, 0-5 | 54.20 | 14,239 | 78,067 | 4.6 | 11.5 |
|
1.5 | 7.6 | 1,242 |
| 7H-4, 0-5 | 59.80 | 53,469 | 84,848 | 0.2 | 8.2 |
|
|
2.0 | 6,521 |
| 8H-5, 0-5 | 69.51 | 30,546 | 101,834 | 0.2 | 5.3 | 21 |
|
1.4 | 5,763 |
| 9H-5, 0-5 | 80.10 | 31,761 | 143,078 | 0.3 | 6.9 | 29 |
|
2.0 | 4,603 |
| 10H-5, 0-5 | 88.54 | 9,998 | 91,465 |
|
2.9 |
|
|
1.0 | 3,448 |
| 11H-5, 0-5 | 99.15 | 17,658 | 141,058 | 0.4 | 8.6 |
|
|
3.5 | 2,053 |
| 12H-5, 0-5 | 107.19 | 9,998 | 171,092 | 0.3 | 5.0 |
|
|
2.3 | 2,000 |
| 13H-6, 0-5 | 118.66 | 5,250 | 110,549 | 0.2 | 4.1 | 24 |
|
2.3 | 1,280 |
| 14H-4, 0-5 | 126.30 | 8,817 | 124,767 | 0.2 | 4.1 |
|
|
1.5 | 2,150 |
| 15X-3, 0-5 | 131.22 | 5,748 | 118,051 | 0.4 | 4.9 |
|
|
2.7 | 1,173 |
| 16X-4, 0-5 | 142.80 | 2,470 | 80,672 |
|
1.0 |
|
|
0.6 | 2,470 |
| 17X-2, 0-5 | 149.40 | 3,722 | 115,744 |
|
2.8 |
|
|
1.6 | 1,329 |
| 18X-3, 0-5 | 160.25 | 3,834 | 95,170 | 0.2 | 3.2 |
|
|
2.0 | 1,198 |
| 19X-3, 0-5 | 169.01 | 3,365 | 76,715 |
|
1.7 |
|
|
1.0 | 1,979 |
| 20X-5, 0-5 | 181.74 | 3,162 | 82,081 |
|
2.7 |
|
|
2.1 | 1,171 |
| 21X-4, 0-5 | 189.92 | 4,336 | 136,983 | 0.4 | 5.2 |
|
|
4.2 | 834 |
| 22X-4, 0-5 | 200.32 | 6,335 | 142,740 | 0.3 | 5.3 |
|
|
4.7 | 1,195 |
| 23X-4, 0-5 | 209.56 | 3,830 | 97,311 | 0.2 | 3.9 |
|
0.7 | 1.3 | 982 |
| 24X-4, 0-5 | 219.76 | 3,740 |
|
|
2.0 |
|
|
2.0 | 1,870 |
| 25X-4, 0-5 | 229.68 | 3,349 |
|
0.4 | 7.4 |
|
|
8.5 | 453 |
| 26X-4, 0-5 | 239.30 | 3,685 | 3,104 |
|
1.6 |
|
|
1.2 | 2,362 |
| 27X-4, 0-5 | 248.90 | 4,278 |
|
0.3 | 5.0 |
|
|
5.9 | 861 |
| 28X-4, 0-5 | 258.50 | 1,567 | 33,961 | 0.3 | 1.0 |
|
|
0.9 | 1,507 |
| 29X-4, 0-5 | 268.10 | 2,928 |
|
0.9 | 3.4 |
|
|
|
849 |
| 30X-4, 0-5 | 277.80 | 5,208 | 86,673 | 0.5 | 3.4 |
|
|
3.6 | 1,545 |
| 31X-4, 0-5 | 286.39 | 5,040 |
|
1.4 | 6.6 |
|
0.2 | 9.6 | 761 |
| 32X-4, 0-5 | 297.00 | 3,024 | 66,569 | 0.7 | 2.0 |
|
|
1.8 | 1,512 |
| 33X-4, 0-5 | 306.64 | 2,641 |
|
0.4 | 2.5 |
|
0.1 | 3.3 | 1,056 |
| 34X-4, 0-5 | 316.18 | 2,887 |
|
0.4 | 1.8 |
|
|
2.4 | 1,604 |
| 35X-4, 0-5 | 325.90 | 6,973 | 98,034 | 0.5 | 6.8 |
|
|
7.8 | 1,025 |
| 37X-4, 0-5 | 334.19 | 2,124 | 41,706 | 0.4 | 5.0 |
|
|
6.5 | 425 |
| 38X-4, 0-5 | 345.10 | 2,239 |
|
0.3 | 1.7 |
|
|
1.8 | 1,317 |
| 39X-4, 0-5 | 353.62 | 3,427 | 56,214 | 0.9 | 8.0 |
|
|
10.0 | 430 |
| 40X-5, 0-5 | 363.69 | 3,602 |
|
0.5 | 4.6 |
|
|
5.1 | 783 |
| 41X-4, 0-5 | 374.00 | 4,414 | 68,072 | 2.2 | 12.3 |
|
0.9 | 14.2 | 359 |
| 42X-4, 0-5 | 383.70 | 4,902 |
|
0.4 | 4.5 |
|
|
4.2 | 1,089 |
| 43X-4, 0-5 | 392.49 | 3,908 |
|
1.1 | 9.4 |
|
|
10.2 | 416 |
| 44X-3, 0-5 | 401.40 | 2,519 | 101,315 | 1.0 | 4.0 |
|
0.4 | 4.0 | 630 |
| 45X-3, 0-5 | 411.10 | 2,623 |
|
0.8 | 3.0 |
|
0.4 | 3.0 | 874 |
| 46X-3, 0-5 | 420.70 | 3,907 |
|
1.0 | 3.3 |
|
|
3.0 | 1,184 |
| 47X-4, 0-5 | 431.80 | 3,486 | 103,868 | 0.8 | 6.0 |
|
0.2 | 6.0 | 581 |
| 48X-3, 0-5 | 440.00 | 2,770 |
|
0.2 | 1.6 |
|
|
1.1 | 1,731 |
| 49X-4, 0-5 | 451.30 | 1,662 | 47,590 | 0.3 | 2.0 |
|
|
2.0 | 831 |
| 50X-4, 0-5 | 460.26 | 1,410 |
|
0.8 | 5.6 |
|
|
6.1 | 252 |
| 51X-4, 0-5 | 470.40 | 3,097 | 43,068 | 0.2 | 4.3 |
|
|
3.5 | 720 |
| 52X-4, 0-5 | 479.19 | 3,556 |
|
1.7 | 3.8 |
|
0.8 | 3.5 | 936 |
| 53X-4, 0-5 | 489.20 | 8,201 | 21,321 | 1.2 | 3.0 |
|
0.5 | 2.0 | 2,734 |
| 54X-5, 0-5 | 499.58 | 5,867 |
|
2.7 | 9.0 |
|
1.7 | 10.4 | 652 |
| 55X-4, 0-5 | 508.25 | 4,581 | 41,332 | 1.4 | 3.5 |
|
|
3.0 | 1,309 |
| 56X-5, 0-5 | 518.93 | 5,135 |
|
1.1 | 5.7 |
|
0.6 | 6.0 | 901 |
| 57X-6, 0-5 | 530.53 | 5,351 | 38,751 | 0.9 | 4.0 |
|
|
4.0 | 1,338 |
| 58X-4, 0-5 | 537.60 | 7,415 |
|
0.4 | 2.3 |
|
|
1.6 | 3,224 |
| 59X-5, 0-5 | 548.76 | 2,759 | 39,092 | 0.5 | 1.4 |
|
|
1.0 | 1,971 |
| 60X-5, 0-5 | 557.74 | 18,957 |
|
1.2 | 5.8 |
|
0.6 | 4.1 | 3,268 |
| 61X-5, 0-5 | 567.87 | 5,076 | 45,667 | 0.6 | 2.4 |
|
|
2.0 | 2,115 |
| 62X-4, 0-5 | 576.20 | 10,821 |
|
0.3 | 3.0 |
|
|
2.0 | 3,607 |
| 63X-5, 0-5 | 586.30 | 2,942 | 23,015 | 0.5 | 1.6 | 36 |
|
1.3 | 1,839 |
| 64X-4, 0-5 | 595.40 | 4,214 |
|
0.3 | 1.8 |
|
|
1.6 | 2,341 |
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.