Table T7. Concentrations of methane, ethane, ethylene, and propane in headspace gas, Holes 1245B, 1245C, 1245D, and 1245E.
Core, section,
interval (cm)
Depth
(mbsf)
C1
(ppmv)
C2
(ppmv)
C2=
(ppmv)
C3
(ppmv)
C1/C2
C1
(mM)
204-1245B-






1H-1, 0-5 0.0 11.0



0.001
1H-2, 0-5 1.5 5.3



0.000
1H-3, 0-5 3.0 8.7



0.002
1H-4, 0-5 4.5 14.1



0.002
1H-5, 0-5 6.0 42.0



0.01
1H-6, 0-5 7.5 1,321 0.5

2,540 0.20
1H-7, 0-5 8.5 9,964 0.7

15,329 1.13
2H-2, 0-5 11.0 24,698 1.2

20,244 3.66
2H-3, 0-5 12.5 56,500 1.1 0.5 0.4 50,000 5.34
2H-5, 0-5 15.5 39,855 1.9

20,866 5.64
3H-2, 0-5 20.5 30,224 1.4 0.6
22,388 3.39
3H-6, 0-5 26.5 15,643 0.5

34,007 3.13
4H-3, 0-5 31.5 16,351 0.8 0.9
21,801 2.89
4H-6, 0-5 36.0 14,612 0.7 0.6
20,580 3.01
5H-3, 0-5 41.0 13,356 0.7 0.6
20,236 2.08
5H-6, 0-5 45.5 13,687 0.7 0.8
21,057 3.14
6H-4, 0-5 52.0 17,831 0.8 0.5
21,745 2.27
7H-3, 0-5 59.1 15,347 0.6 0.5 0.5 26,012 2.46
7H-6, 0-5 63.1 12,012 0.7

18,480
8H-3, 0-5 69.4 15,354 0.6
0.7 26,024 2.89
8H-6, 0-5 73.9 16,066 0.8

20,337 2.72
9H-5, 0-5 81.7 13,713 0.5

27,426 2.06
10H-3, 0-5 88.1 11,178 0.6

20,324 2.49
11H-3, 0-5 97.5 10,995 0.7

16,410 2.03
12H-3, 0-5 107.5 10,000 0.6

17,241 1.92
13H-3, 0-5 116.8 15,338 1.6
5.3 9,769 2.53
13H-6, 0-5 121.0 14,049 3.5
7.0 4,049 3.23
14H-2, 0-5 124.1 10,437 8.2
9.0 1,279 1.83
14H-4, 0-5 127.0 11,575 18.2
14.1 637 2.49
15X-4, 0-5 130.9 12,689 200
106 63 1.78
16X-2, 0-5 139.0 8,491 242
159 35 1.52
16X-4, 0-5 142.0 85,022 557
166 153 10.57
18X-4, 0-5 153.5 12,731 182 0.5 144 70 2.02
19X-2, 0-5 158.5 10,320 232
370 44 1.59
20X-3, 0-5 169.5 15,862 225 0.4 430 70 1.84
21X-3, 0-5 179.0 15,891 203 5.0 320 78 2.11
22X-3, 0-5 188.4 10,261 74.6 0.7 101 138 1.80
23X-3, 0-5 197.7 17,222 70.3
75.8 245 2.15
24X-3, 0-5 207.2 14,388 28.6
25.1 504 1.98
25X-3, 0-5 217.0 15,707 22.4
18.2 700 2.27
26X-3, 0-5 226.6 11,405 7.7

1,485 2.27
27X-3, 0-5 236.3 14,328 7.3

1,971 2.09
28X-3, 0-5 245.9 6,166 3.4 0.5
1,830 1.70
29X-3, 0-5 255.6 10,400 3.7

2,796 2.91
30X-3, 0-5 265.2 19,945 10.2 1.18 6.5 1,965 2.79
31X-3, 0-5 274.8 7,521 4.7 0.5
1,607 2.67
32X-3, 0-5 284.5 11,519 6.8 1.3
1,699 1.94
34X-3, 0-5 296.2 10,809 4.0 0.7
2,696 2.28
35X-3, 0-5 303.8 14,797 6.3 0.6
2,360 2.09
36X-3, 0-5 313.4 44,994 7.8

5,798 7.72
37X-3, 0-5 323.0 66,367 15.4 1.0
4,324 7.30
38X-3, 0-5 332.7 20,203 10.5 1.4
1,931 2.89
39X-3, 0-5 342.2 2,868 3.5 0.8
827 0.62
40X-3, 0-5 351.9 3,170 2.2

1,447 1.23
41X-3, 0-5 361.5 1,278 2.3

561 0.42
42X-3, 0-5 371.2 14,071 8.3 0.7
1,706 3.12
43X-3, 0-5 380.8 3,305 3.6 0.8
923 1.24
44X-3, 0-5 390.4 8,502 8.4 0.5
1,016 1.58
45X-3, 0-5 400.1 4,042 3.8

1,053 2.17
47X-3, 0-5 410.1 32,965 35.6
11.3 925 3.24
48X-3, 0-5 419.3 20,050 21.6 0.1 6.7 927 2.54
49X-3, 0-5 428.6 24,534 17.2 0.5 5.7 1,428 4.18
50X-3, 0-5 438.5 14,841 21.2 0.7 9.1 701 2.71
51X-3, 0-5 448.2 16,085 22.4 0.5 9.5 720 2.65
52X-3, 0-5 457.7 26,830 35.6
12.6 754 3.26
53X-3, 0-5 466.8 3,998 11.2
6.8 359 1.51








204-1245C-






1H-1, 0-5 0.0 110,278 193

573 15.6
1H-2, 15-16 1.6 443 1.1

396 0.1
1H-3, 110-111 4.0 33.0



0.0
1H-6, 61-66 7.5 7,086 0.6

12,432 1.6
2H-2, 0-5 9.0 36,225 1.1

33,855 5.1
2H-3, 0-5 10.5 58,291 1.4

41,341 7.2
2H-4, 0-5 12.0 40,818 1.2

34,015 7.2
2H-6, 0-5 15.0 27,002 1.0 0.4
27,002 3.4
4H-3, 0-5 22.0 23,683 1.6 0.4
15,279 3.9
4H-6, 0-5 26.5 27,079 1.1 0.7
24,395 4.1
5H-3, 0-5 31.5 12,696



1.9
5H-6, 0-5 36.0 17,341
0.6

2.9
6H-2, 0-5 38.7 12,901 0.9

14,334 2.0
7H-3, 0-5 50.5 10,928
0.5

2.0
9H-3, 0-5 62.0 15,583 0.5 0.4
30,555 2.4
10H-3, 0-5 70.5 13,363 0.6 0.3
23,040 2.4
11H-5, 0-5 82.8 13,329



2.1
12H-3, 0-5 90.5 5,456



0.9
13H-3, 0-5 99.9 23,672 1.2 0.6 1.1 19,564 3.4
14H-3, 0-5 109.5 14,637 0.7 0.3
20,329 2.2
15X-5, 0-5 120.8 12,676 2.7
6.4 4,626 2.0
17X-3, 0-5 124.8 14,448 38.2 1.1 42.8 379 2.0
19X-2, 0-5 131.5 10,651 170 0.8 123 63 2.3
20X-3, 0-5 141.7 12,655 169 0.6 83.9 75 2.7
21X-3, 0-5 151.4 13,334 208 0.5 127 64 2.3
22X-3, 0-5 160.9 10,189 175 0.4 170 58 2.1
23X-3, 0-5 170.4 11,144 120 0.4 118 93 2.6
24H-3, 0-5 180.1 25,673 195 0.5 172 131 4.7
25H-3, 0-5 189.6 11,288 53.2
54.1 212 2.7
26H-3, 0-5 194.1 21,203 93.7 1.3 92.6 226 4.1
28H-2, 0-5 198.4 15,348 40.5
29.8 379 2.8
204-1245D-






1H-1, 0-5 0.0 3.7



0.0
1H-1, 145-150 1.5 4.7



0.0
1H-2, 145-150 3.0 11.1



0.0
1H-3, 95-100 4.0 18.3



0.0
1H-4, 63-68 4.6 44.5



0.0
2H-1, 0-5 5.0 45.8



0.0
2H-1, 145-150 6.5 574



0.1
2H-2, 145-150 8.0 5,547



1.3
2H-3, 145-150 9.5 18,973



3.9
2H-4, 145-150 11.0 32,631




2H-5, 145-150 12.5 35,015 0.9

37,250 5.9
2H-6, 145-150 14.0 50,188 1.3

38,905 6.6
3H-1, 145-150 16.0 27,268 0.7

41,951
3H-2, 145-150 17.5 46,175 1.1

41,977 7.9
3H-3, 145-150 19.0 31,980 1.0

32,303 7.0
3H-4, 145-150 20.5 37,036 0.9

40,699 7.0
3H-5, 145-150 22.0 42,508 1.2

36,024 5.6
3H-6, 145-150 23.5 18,016 0.3

52,988 2.3
204-1245E-






1R-2, 0-5 475.1 29,596 69.5
60.1 426
2R-2, 0-5 482.5 62,035 91.7
68.4 676
3R-2, 0-5 492.6 101,321 85.3
51.8 1,188
4R-2, 0-5 502.4 59,595 53.2
25.8 1,121
5R-2, 0-5 511.9 93,043 87.7
41.9 1,061
6R-2, 0-5 521.3 63,888 73.8
37.0 865
7R-2, 0-5 531.3 36,334 48.9
18.4 742
8R-1, 75-80 540.1 89,538 89.9
30.8 996

Note: C1 = methane, C2 = ethane, C2= = ethylene, C3 = propane.