Table T2. Carbon isotopic composition of methane and carbon dioxide in void gas.
Core, section,
interval, (cm)
Depth
(mbsf)
C1/C2
13C ( PDB)
C1
CO2
204-1244B-
3H-1, 105 17.2 136,300 –73.7 –7.4
4H-2, 72 26.5 138,100 –72.1 0.2
4H-8, 33 35.1 144,500 –69.7 –0.3
5H-7, 101 44.1 71,100 –68.9 2.9
6H-3, 1 45.4 124,300 –67.9 2.5
6H-7, 60 52 79,300 –68.3 7.3
204-1244C-
3H-1, 49 15.5 NA –77.1 –7.7
4H-1, 110 25.5 NA –69.2 1.4
5H-1, 121 35.2 142,900 –68.6 0.7
6H-2, 136 46.4 80,000 –68 1.3
7H-2, 122 54.7 77,600 –67.5 0.1
7H-3, 90 55.7 NA –67.3 3.3
8H-7, 25. 70.7 69,800 –69.1 1.4
9H-2, 85 74.4 82,500 –67.2 3.4
10H-1, 61 82.1 64,100 –67.4 –0.9
12H-1, 107 101.6 50,500 –66.9 –0.8
13H-2, 69 112.1 47,600 –66.5 –1.1
15H-2, 35 122.9 15,400 –65.4 3.5
19X-3, 10 146.1 5,500 –60.5 –2.9
20X-3, 27 152.8 6,500 –64.6 0.3
21X-3, 88 162.7 4,400 –67.3 –2.2
22X-3, 90 172.2 4,000 –67.3 0.1
26X-2, 80 208.4 3,100 –66.7 –2.4
27X-5, 50 222.3 2,800 –65.1 1.7
29X-3, 37 237.6 2,600 –64.6 1.7
30X-1, 96 245.8 2,200 –65.5 –4
30X-5, 67 251.4 2,200 –64.1 0
31X-3, 150 258.8 2,500 –65.4 –2.4
32X-1, 75 264.8 1,800 –62.8 –0.4
33X-2, 2 275.1 2,000 –63.7 2.7
34X-4, 2 287.8 2,200 –63 3.4
35X-3, 2 296 2,300 –62.9 3.7
36X-7, 5 311.1 2,000 –62.3 0.6
38X-2, 14 323.5 1,800 –63.7 0.4
204-1244E-
4H-1, 40 20.5 NA –73.6 –5
4H-2, 68 22.4 133,900 –73.5 –1.9
5H-1, 113 30.8 132,900 –71.1 0.1
5H-7, 31 39 143,200 –69.6 2
7H-2, 103 43.7 121,500 –69.1 –0.1
7H-6, 101 49.7 59,300 –69.1 0.7
9H-4, 20 57 NA –68.8 4.3
9H-5, 15 58.8 73,400 –68.2 0.2
10H-1, 36 62.5 133,500 –68.1 –0.5
12H-5, 68 80.3 226,700 –68.3 0.2
13H-1, 4 83.1 102,100 –64.1 2.1
13H-3, 2 86.2 70,200 –68.5 1.7
13H-5, 120 90.3 57,100 –67.3 2.2
14H-2, 3 94.1 84,800 –67.5 4
14H-4, 118 98.2 229,400 –64 0.7
17H-2, 108 116.2 38,800 –68.1 0.4
18H-1, 85 124 44,800 –68.1 –1.4
18H-6, 26 130.9 6,500 –67 1.1
204-1245B-
3H-6, 46 27 165,800 –71.8 –2.6
7H-4, 78 61.6 48,550 –68.4 2
10H-1, 133 86.8 69,240 –67.7 4.1
11H-3, 97 98.4 90,160 –67.4 1.2
12H-5, 81 111.3 133,900 –66.9 2.2
14H-3, 50 126.1 3,070 –66.3 1
16X-2, 122 140.2 270 –64.1 2.3
18X-2, 25 150.6 360 –59.9 5.5
18X-4, 55 154 NA –64.4 2.6
22X-4, 80 190.7 1,440 –63.2 –3.1
23X-1, 50 195.2 1,400 –64 0.5
26X-2, 91 226 6,330 –64.3 –0.2
29X-3, 16 255.8 9,230 –64.1 1.2
31X-2, 48 273.9 10,370 –64.1 –1.5
32X-2, 94 283.9 10,070 –63.6 –0.6
34X-6, 68 301.4 14,950 –63.9 –3.3
37X-4, 112 325.6 10,790 –64.4 –2
42X-2, 48 370 7,930 –64.5 –3
44X-1, 39 387.8 6,150 –64.8 –3.4
47X-4, 1 411.2 6,780 –65.5 –4.7
48X-3, 77 420.1 4,960 –65.9 –2
50X-4, 40 440.1 3,620 –65.8 –5.4
52X-3, 140 459.1 3,440 –66.4 –6.8
53X-5, 14 469.9 3,060 –65.7 –7.7
204-1245C-
5H-1, 47 29 181,100 –66.9 5.5
7H-1, 126 48.8 44,450 –69.3 –3.9
10H-4, 100 73 53,100 –67.4 6.6
13H-4, 26 101.1 205,400 –67 2.8
14H-3, 70 110.2 40,560 –67.3 0.1
17X-2, 50 124 2,220 –65.9 2.2
19X-2, 12 131.6 200 –63.8 2.6
20X-3, 3 141.7 340 –64.4 2.7
21X-2, 131 151.2 250 –64.2 2.8
22X-5, 49 164.4 310 –63.1 5.3
23X-3, 70 171.1 340 –62.6 4.1
24H-6, 69 185.3 490 –61.2 4.6
25H-3, 63 190.2 840 –64.3 –0.2
26H-1, 135 192.5 1,140 –63.9 1.4
28H-1, 113 198 2,070 –63.3 3.7
204-1245D-
3H-1, 12 14.6 15 –75.8 –11.6
3H-7, 51 24 17 –73.5 –2
204-1246B-
3H-3, 20 17.4 109,000 –75.3 –5
4H-1, 97 24.7 104,300 –73.4 –5.1
5H-3, 62 36.8 75,100 –71.1 –2.8
6H-4, 71 47.8 52,800 –69.3 5.7
7H-3, 1 55 73,800 –70 3.5
8H-4, 5 66.3 44,500 –69.4 –2.7
9H-2, 1 72.4 61,700 –68.3 1
10H-1, 100 81.7 56,300 –68.5 0.9
11H-2, 33 92.5 93,500 –68.1 1.8
12H-2, 100 102.2 25,800 –67.4 2.5
13H-1, 150 110.7 2,680 –66.1 2.8
14H-2, 102 121.2 2,370 –66.8 0.9
15H-2, 1 123.8 1,930 –66.7 2.1
15H-5, 24 128.5 1,760 –65.4 1.2
16H-4, 73 135 1,490 –65.3 3.5
204-1247B-
5H-1, 62 25.2 94,171 –73.1 –2.3
5H-2, 127 27.4 96,441 –71.6 –3.2
5H-7, 8 33.7 98,466 –70.4 0.8
6H-1, 119 35.3 94,299 –70.7 –1.3
6H-2, 71 37.8 90,729 –69.3 1.2
6H-7, 46 43.6 83,447 –70 0.2
7H-2, 88 46 78,301 –70.7 4.5
7H-4, 64 48.7 26,095 –70.9 6.3
8H-1, 71 53.8 73,269 –70.4 2.3
8H-2, 137 56 25,371 –70.7 5.2
8H-3, 138 57.4 44,737 –64.6 2.2
8H-4, 117 58.8 55,801 –68.9 0.5
9H-1, 95 63.5 70,735 –68.3 1.7
9H-3, 124 66.8 68,728 –69.6 2.2
10H-2, 46 74.1 47,542 –69.7 3.8
10H-4, 87 77.5 47,786 –67.8 4.4
10H-6, 58 80.2 49,731 –67.8 2.5
11H-1, 54 81.5 23,947 –65.4 3.8
11H-3, 13 84.7 26,160 –69.7 4.3
11H-6, 31 89.4 49,012 –67.4 1.8
12H-2, 1 92.6 23,815 –70 –0.5
12H-2, 50 93.1 24,626 –67.9 n.a.
12H-4, 1–27 96.9 49,558 –68.3 2.1
13H-2, 15 102.3 19,540 –68.4 2.1
13H-5, 11 106.7 31,025 –68 2.4
14H-1, 24 106.9 24,433 –67.5 0.8
14H-4, 105 112.3 32,632 –67.7 7.4
15X-2, 116 116.3 10,989 –68.7 –2.2
15X-3, 88 117.5 10,514 –62.9 2.9
19X-1, 129 135.9 844 –65 0.9
19X-3, 75 138.3 NA –64.9 1.1
20X-1, 105 145.3 506 –65.8 1.3
20X-2, 115 146.9 473 –64.4 1.2
20X-3, 30 147.5 492 –65.3 1.7
20X-4, 88 149.6 446 –64.3 0.9
23X-1, 18 173.3 85 –65.8 –0.3
24X-4, 140 188.7 135 –65.6 1.8
24X-5, 140 190.2 142 –64.9 2.8
25X-3, 102 196.1 223 –65.7 0.9
25X-4, 118 197.5 230 –65 0
27X-1, 42 211.6 208 –63 0.4
204-1248B-
2H-3, 50 9 492 –65.3 –2.9
204-1248C-
1X-1, 100 1 740 –66.1 –18.4
3X-2, 150 22.3 1,033 –66.7 3.8
5X-1, 148 38.5 1,991 –68.8 1.1
6H-3, 99 50.8 3,201 –69.8 3.4
6H-5, 69 53 3,037 –68.3 7.6
6H-6, 120 55 2,920 –66.1 –1.5
7H-4, 20 62.2 4,759 –68.7 3.5
7H-6, 4 65 9,106 –68.6 3.4
8H-2, 15 68.7 5,974 –67.6 3.3
8H-5, 6 73 5,063 –65.8 0.8
9H-6, 99 85 5,139 –67.9 3.7
10H-5, 132 92.9 6,844 –66.8 2.9
11H-4, 70 99.8 5,495 –66 –0.2
11H-4, 70 99.8 5,557 –66.9 4.4
11H-6, 28 101.5 5,037 –66.9 2.6
12H-2, 98 107.5 2,262 –67.5 1.2
12H-3, 134 109.2 967 –65.7 4.4
13H-2, 7 116 793 –66.7 2.9
13H-4, 101 119.9 464 –66.4 2.9
14H-5, 101 129.8 166 –64.8 1.6
15H-1, 56 134.1 70 –64.4 2.1
16H-3, 107 140.6 136 –64.1 2
204-1249B-
2A-1, 70 30.5 535 –67 –4.3
4A-1, 74 38.3 461 –68.2 –3
204-1249C-
1H-1, 1 0.6 751 –66.6 –3.4
2H-1, 130 3.3 723 –65.2 –5
4H-5, 75 22 505 –64.9 –6.4
5H-3, 1 24.5 576 –64.5 –1.1
7H-6, 38 40.6 674 –65.6 3.8
8H-2, 24 46.2 1,503 –67.9 2.4
9H-3, 135 58.3 4,093 –68.6 –1.3
11H-5, 137 71 7,536 –67.9 3.7
12H-1, 110 76.2 14,602 –69.2 5.3
204-1249F-
7H-3, 1 23.5 589 –60.3 –2.6
8H-2, 120 33 531 –65.8 –4.6
10H-2, 145 52.1 1,551 –64.6 –5.6
12H-2, 26 62.2 2,937 –68.6 –3.1
12H-5, 40 66.8 2,770 –69.1 1.8
15H-3, 22 75.4 5,340 –69.3 –0.6
15H-4, 64 77.4 6,372 –69 0.2
16H-3, 22 85.7 6,549 –68.6 3.6
204-1250B-
1H-1, 100 1 1,268 –64.1 1.8
3H-1, 96 15 4,646 –64.7 2.5
3H-6, 145 23 7,434 –66.9 2.5
4H-4, 105 28.7 10,150 –67.5 1.3
5H-1, 120 34.2 9,414 –67.7 1.3
7H-5, 130 58 25,290 –67.2 4.6
8H-1, 120 62.7 45,155 –67.6 3.3
8H-6, 29 69.3 9,432 –69 2.5
10H-3, 6 75.5 7,709 –67.4 –2.1
10H-6, 33 80.3 12,163 –66.7 –0.9
12H-2, 66 93.3 12,702 –65.8 –0.8
13H-6, 107.9 2,434 –65.7 0.5
14H-1, 55 111.6 1,003 –63.4 4.5
17H-4, 20 133.7 2,156 –62.9 5
19H-4, 126 144.2 1,969 –62.9 5.1
204-1250D-
4H-1, 149 27 16,379 –68.7 4.1
204-1250F-
1H-2, 141 102.9 6,497 –67 1.6
1H-4, 7 104.6 2,456 –67.5 2.8
1H-4, 94 105.4 5,496 –66 1.1
1H-5, 75 106.8 1,820 –64 3.3
2H-3, 1 112.5 823 –67 5.3
2H-3, 7 112.6 827 –66.1 2.9
3X-2, 54 115.5 743 –65.4 2.4
5H-1, 34 121.3 1,230 –65 4.1
5H-1, 130 122 1,396 NA 3.7
6X-1, 100 128.3 1,443 –62.5 0.7
9X-2, 124 136.7 2,128 –62.1 1.6
11X-3, 145 157.7 223 –61.7 5.4
12X-1, 111 163.9 174 –62.1 4.8
12X-5, 45 169.3 179 –62.2 5.2
13X-2, 72 174.6 124 –61.9 3.7
13X-5, 30 178.7 126 –62.3 8.1
204-1251B-
1H-4, 68 5.2 198,645 –74.7 –5.6
3H-3, 51 22 274,584 –71 1.5
4H-1, 57 28.7 NA –67.3 2.3
4H-3, 20 31.3 399,181 –67.5 1.9
4H-7, 16 36.6 NA –67.9 2.4
6H-2, 5 48
–68.1 2.6
7H-1, 149 58.1 442,341 –68.5 2.9
7H-6, 33 64.4 250,030 –68.5 3.6
8H-3, 82 69.9 140,672 –68.4 0.5
8H-4, 80 71.4 199,614 –67.9 3.5
10H-1, 150 86.6 368,417 –67.1 2.7
11H-2, 32 96.4 55,406 –67.6 3.3
13H-5, 37 111.9 29,370 –67.9 4
14H-3, 33 118.4 93,119 –67.1 3.6
15H-6, 14 132.7 120,307 –67.7 2.5
16H-6, 16 142.2 85,616 –65.4 2.7
17H-5, 105 151.1 88,374 –65.7 2
19H-6, 17 162.7 93,976 –67.5 3.4
20H-5, 142 170.6 18,931 –67.3 0.5
20H-2, 1 164.7 67,563 –66.1 3.7
22H-1, 93 173.6 66,788 –66 2.2
22H-5, 120 179.9 89,846 –62.3
26X-2, 119 206.9 4,158 –64.5 0
27X-5, 35 219.9 8,394 –63.9 –1.5
28X-2, 41 225 6,732 –62.4 0.3
29X-3, 17 236 8,423 –64.6 0.2
29X-4, 13 237.4 8,879 –64 3.4
31X-4, 1 256.5 7,810 –62.2 3.7
32X-1, 106 262.8 5,216 –62.6 –0.7
34X-2, 102 283.5 4,415 –60 2.6
37X-3, 2 303.6 4,362 –61.5 2.2
38X-6, 5 317.7 4,196 –59.6 0.6
39X-3, 140 324.3 4,583 –60.2 5.8
41X-4, 5 335.2 4,685 –60.1 1.4
42X-2, 75 341.5 3,960 –60 2.4
43X-6, 82 357.1 3,126 –59.4 2.4
44X-6, 55 366.5 4,788 –59.3 2.9
45X-4, 100 373 5,436 –61.3 –0.5
46X-3, 100 381.6 6,301 –59.5 –0.6
47X-4, 124 393 7,000 –59.3 1.4
49X-2, 102 400.4 7,095 –58.3 2.2
50X-3, 5 409.6 6,360 –57 0.6
51X-5, 44 422.6 7,733 –60.9 3.6
52X-5, 98 432.8 8,393 –60.1 6.1
53X-2, 112 438.1 7,962 –59.6 0.2
204-1252B-
3H-3, 31 16.5 128,853 –70.4 –0.9
4H-2, 25 25.7 81,088 –69.5 1.4
5H-2, 74 34.7 69,019 –69 3
5H-5, 90 39.4 138,490 –68.1 4.2
6H-4, 88 48.3 90,205 –67.8 5.9
7H-6, 44 60.3 98,206 –67 3.8
9H-7, 14 80.4 45,274 –66.7 0.5
11H-3, 1 93.4 28,792 –67.2 2.6
12H-3, 78 103.7 7,580 –66.7 1.4
13H-1, 130 110.7 6,061 –67.6 –0.2
14H-6, 1 126.1 7,844 –67.1 –1.8
15X-4, 72 130.1 12,341 –65.8 –3.3
16X-2, 1 136.2 8,912 –65.5 –0.3
17X-2, 1 145.9 9,692 –64.2 2.2
17X-5, 1 150.4 9,397 –66.2 1.3
18X-4, 1 158.6 8,977 –63.7 –0.1
20X-4, 53 178.5 6,011 –62.1 4.5
21X-4, 64 188.2 3,547 –60.1 3.6
23X-4, 20 206.2 2,870 –58.8 6.7
25X-6, 15 228.6 2,982 –56.8 1.8
26X-2, 42 232.4 2,615 –60.2 6.7
27X-2, 1 241.7 2,840 –62.1 2.7
27X-5, 25 246.4 3,298 –61.5 9.7
28X-6, 2 257.4 3,319 –62.9 3.9

Notes: PDB = Peedee belemnite. NA = not analyzed.