|
Core, section,
interval (cm) |
Depth
(mbsf) |
C1
(ppmv) |
CO2
(ppmv) |
C2=
(ppmv) |
C2
(ppmv) |
H2S
(ppmv) |
C3=
(ppmv) |
C3
(ppmv) |
C1/C2
|
|---|---|---|---|---|---|---|---|---|---|
| 175-1084A- | |||||||||
| 1H-2, 0-5 | 1.50 | 3.2 | 2,111 |
|
|
|
|
|
|
| 2H-3, 0-5 | 6.00 | 3,248 | 24,605 |
|
|
|
|
|
|
| 2H-6, 0-5 | 10.50 | 26,991 | 63,842 | 0.2 | 0.5 | 26 |
|
|
53,982 |
| 3H-4, 0-5 | 17.00 | 45,832 | 59,528 | 0.2 | 0.8 | 27 | 0.2 | 0.6 | 57,290 |
| 4H-4, 0-5 | 26.50 | 64,469 | 82,735 | 0.2 | 1.0 |
|
|
|
64,469 |
| 5H-4, 0-5 | 35.90 | 27,032 | 107,765 | 0.7 | 2.8 |
|
0.7 | 2.2 | 9,654 |
| 6H-4, 0-5 | 45.30 | 68,458 | 135,912 |
|
1.3 |
|
|
1.2 | 52,660 |
| 7H-5, 0-5 | 55.98 | 12,536 | 133,617 | 1.2 | 4.6 |
|
1.2 | 3.7 | 2,725 |
| 8H-4, 0-5 | 64.40 | 27,128 | 209,240 | 0.3 | 1.7 | 23 |
|
1.3 | 15,958 |
| 9H-4, 0-5 | 73.90 | 13,600 | 193,132 | 0.6 | 2.2 |
|
0.3 | 1.6 | 6,182 |
| 10H-6, 0-5 | 86.50 | 9,520 | 177,778 | 1.1 | 3.8 |
|
1.1 | 3.0 | 2,505 |
| 11H-5, 0-5 | 93.17 | 20,142 | 213,686 | 0.7 | 2.0 |
|
0.7 | 1.6 | 10,071 |
| 12H-4, 0-5 | 101.26 | 4,277 | 221,269 | 0.7 | 3.2 |
|
0.5 | 3.0 | 1,337 |
| 13H-4, 0-5 | 112.00 | 13,617 | 248,365 | 0.4 | 1.4 |
|
0.4 | 1.4 | 9,726 |
| 14H-4, 0-5 | 121.50 | 9,722 | 273,365 | 0.9 | 2.4 |
|
|
2.5 | 4,051 |
| 15H-4, 0-5 | 131.10 | 3,852 | 172,859 | 0.6 | 1.7 |
|
|
1.9 | 2,266 |
| 16H-5, 0-5 | 142.00 | 3,783 | 206,605 | 0.4 | 1.4 |
|
0.3 | 1.8 | 2,702 |
| 17H-3, 0-5 | 148.50 | 1,862 | 201,350 |
|
0.5 |
|
|
|
3,724 |
| 19X-3, 0-5 | 155.50 | 1,605 | 161,340 | 0.2 | 0.6 |
|
|
0.6 | 2,675 |
| 20X-4, 0-5 | 164.38 | 1,403 | 138,253 | 0.5 | 1.5 |
|
|
1.8 | 935 |
| 21X-3, 0-5 | 174.80 | 2,573 | 229,659 | 0.2 | 0.8 |
|
|
0.8 | 3,216 |
| 22X-1, 0-5 | 181.50 | 8,311 | 117,098 | 2.5 | 5.9 |
|
2.2 | 6.7 | 1,409 |
| 23X-3, 0-5 | 193.98 | 2,964 | 157,018 | 0.3 | 1.0 |
|
0.2 | 1.0 | 2,964 |
| 24X-2, 0-5 | 202.30 | 2,590 | 220,395 | 0.4 | 1.3 |
|
0.3 | 1.5 | 1,992 |
| 25X-4, 0-5 | 214.90 | 2,336 | 298,177 | 2.5 | 9.8 |
|
2.0 | 11.8 | 238 |
| 26X-2, 0-5 | 221.60 | 2,387 | 226,388 | 0.6 | 2.5 |
|
0.5 | 3.2 | 955 |
| 27X-3, 0-5 | 231.62 | 1,745 | 216,887 | 0.8 | 2.7 |
|
0.4 | 2.7 | 646 |
| 28X-5, 0-5 | 245.30 | 4,088 | 286,378 | 0.7 | 4.4 |
|
0.4 | 3.9 | 929 |
| 29X-4, 0-5 | 253.40 | 3,515 | 282,457 | 1.0 | 4.9 |
|
|
4.4 | 717 |
| 30X-3, 0-5 | 261.50 | 3,321 | 218,533 | 0.5 | 3.9 |
|
0.2 | 2.3 | 852 |
| 31X-2, 0-5 | 269.70 | 3,205 | 154,546 | 0.5 | 3.6 |
|
0.2 | 1.0 | 890 |
| 32X-4, 0-5 | 281.74 | 5,548 | 270,856 | 0.6 | 5.7 |
|
0.2 | 2.8 | 973 |
| 33X-2, 0-5 | 288.90 | 5,246 | 303,662 | 0.7 | 4.6 |
|
|
6.0 | 1,140 |
| 34X-4, 0-5 | 301.10 | 3,038 | 138,190 | 0.3 | 3.0 |
|
|
1.6 | 1,013 |
| 35X-4, 0-5 | 311.01 | 5,673 | 209,037 | 0.5 | 6.4 |
|
|
3.4 | 886 |
| 36X-3, 0-5 | 319.21 | 2,850 | 155,885 | 1.1 | 14.0 |
|
2.3 | 28.5 | 204 |
| 37X-4, 0-5 | 330.40 | 5,165 | 153,465 | 0.6 | 6.7 |
|
|
4.3 | 771 |
| 38X-4, 0-5 | 340.10 | 4,612 | 200,821 | 0.6 | 4.6 |
|
|
2.9 | 1,003 |
| 39X-4, 0-5 | 349.70 | 2,837 | 143,251 | 0.2 | 2.4 |
|
|
1.5 | 1,182 |
| 40X-4, 0-5 | 359.30 | 4,581 | 186,819 | 0.4 | 3.3 |
|
|
2.1 | 1,388 |
| 41X-4, 0-5 | 368.90 | 5,115 | 211,704 | 0.4 | 4.3 |
|
|
2.6 | 1,190 |
| 42X-4, 0-5 | 378.60 | 14,502 | 322,698 | 1.4 | 17.3 |
|
0.2 | 10.9 | 838 |
| 43X-6, 0-5 | 391.20 | 3,081 | 126,581 | 0.2 | 3.4 |
|
|
2.1 | 906 |
| 44X-4, 0-5 | 397.80 | 2,131 | 72,718 |
|
1.5 |
|
|
0.9 | 1,421 |
| 45X-6, 0-5 | 410.40 | 2,730 | 110,027 | 0.4 | 3.1 |
|
|
2.3 | 881 |
| 46X-6, 0-5 | 419.18 | 3,563 | 138,629 | 0.3 | 3.4 |
|
|
1.8 | 1,048 |
| 47X-5, 0-5 | 427.15 | 3,320 | 95,049 | 0.3 | 2.4 |
|
|
1.6 | 1,383 |
| 48X-6, 0-5 | 439.07 | 2,203 | 78,686 |
|
0.7 |
|
|
0.7 | 3,147 |
| 49X-6, 0-5 | 449.10 | 850 | 47,283 | 0.5 | 1.4 |
|
0.1 | 1.4 | 607 |
| 50X-5, 0-5 | 457.20 | 4,412 | 127,188 | 0.4 | 3.0 |
|
|
1.8 | 1,471 |
| 51X-5, 0-5 | 466.80 | 8,057 | 102,932 | 0.4 | 5.9 |
|
|
2.9 | 1,366 |
| 52X-4, 0-5 | 474.50 | 1,928 | 72,465 | 0.3 | 2.0 |
|
|
1.5 | 964 |
| 53X-4, 0-5 | 483.29 | 7,040 | 180,890 | 1.3 | 14.2 |
|
0.3 | 9.9 | 496 |
| 54X-4, 0-5 | 493.26 | 3,747 | 107,424 | 1.1 | 6.4 |
|
0.1 | 4.8 | 585 |
| 55X-3, 0-5 | 502.10 | 1,520 | 50,263 | 0.8 | 4.5 |
|
0.2 | 3.7 | 338 |
| 56X-3, 0-5 | 511.70 | 5,033 | 106,451 | 2.1 | 15.7 |
|
1.3 | 13.8 | 321 |
| 57X-4, 0-5 | 522.80 | 1,828 | 60,902 | 1.3 | 5.7 |
|
|
4.7 | 321 |
| 58X-3, 0-5 | 531.00 | 2,080 | 54,816 | 1.3 | 6.7 |
|
0.9 | 6.0 | 312 |
| 59X-3, 0-5 | 540.70 | 1,701 | 47,267 | 0.8 | 7.3 |
|
0.5 | 6.0 | 233 |
| 60X-3, 0-5 | 550.30 | 7,219 | 87,005 | 2.0 | 12.3 |
|
1.3 | 10.0 | 587 |
| 61X-3, 0-5 | 560.00 | 2,632 | 36,135 | 0.6 | 3.8 |
|
0.3 | 3.1 | 693 |
| 62X-5, 0-5 | 571.40 | 6,439 | 102,691 | 1.3 | 14.3 |
|
0.6 | 12.2 | 450 |
| 63X-5, 0-5 | 582.20 | 6,383 | 104,360 | 1.3 | 9.4 |
|
0.6 | 8.0 | 679 |
| 64X-3, 0-5 | 588.90 | 3,485 | 73,508 | 1.5 | 9.5 |
|
0.8 | 9.3 | 367 |
| 65X-4, 0-5 | 600.00 | 9,105 | 69,502 | 1.1 | 12.3 |
|
0.5 | 10.2 | 740 |
Notes: C1 = methane; CO2 = carbon dioxide; C2= = ethene; C2 = ethane; H2S = hydrogen sulfide; C3= = propene; and C3 = propane. Dominance of C1 over C2 indicates that the gases originate from in situ microbial degradation of organic matter.