Table T6. Carbon isotopic composition of methane and carbon dioxide in hydrate-bound gas.
Core, section,
interval, (cm)
Depth
(mbsf)
C1/C2
13C ( PDB)
C1
CO2
204-1244C-
8H-1, 47–52 65.0 25,647 –67.1 –13.5
10H-2, 70–103 85.0 40,934 –69.5 –5.1
204-1244E-
12H-1, 60–6X 74.2 50,583 –68.3 1.6
204-1245B-
6H-5, 103 54.5 60,730 –69.1 –1.3
9H-CC 85.0 45,431 –67.5 1.7
204-1245C-
13H-4, 56–76 101.4 47,463 –67.8 –3.3
204-1246C-
12H-4 105.1 53,957 –68.2 –9.7
204-1247B-
12H-2, 41–51 93.0 24,150 –70 –3.9
204-1248B-
1H-1, 50–55 0.5 726 –68.1 –30
1H-HYD 2 2.0
–67.1 –11.7
1H-CC 2.2 625 –67.2 –3.5
2H-2, 0–25 7.4 279 –66.2 2
204-1248C-
1X-2, 0–10 1.5 739 –65.9 –26.1
1X-CC 2.2 563 –66.1 –2.6
3X-CC 22.4 753 –67 1.9
8H-6, 85–87 74.6 2,994 –66.3 2.5
10H-1, 100–119 87.0 2,017 –67.8 0.2
204-1249B-
4A-1, 74–82 38.3 284 –64.8 –3.8
204-1249C-
1H-1, 105–120 1.1 1,124 –66.2 –0.1
1H-1, 195–200 2.0 824 –65.3
2H-1, 0–5 2.0 492 –63.3 –9.9
2H-CC 5.0
–66.4 –12.3
3H-1, 106–131 6.1 594 –67 –2
4H-2, 62–72 18.0 563 –66 –2
4H-3, 57–59 19.6 272 –65.4 2.3
204-1249D-
1H-CC 2.1 640 –68 –6.7
3H-1, 150–160 10.5 699 –66.8 3.7
204-1249E-
1H-1, 0–10 0.0 746 –68 –4.8
3H-2, 70–80 10.3 993 –65.3 5.1
204-1249F-
1H-1, 0–20 0.0 898 –68
1H-mbio 2.0
–67.2 –11.9
5H-1, 64–70 16.1 602 –63.2
5H, bottom 16.3
–63.2 2.5
6X-1, 100–110 17.6 352 –64.2 –16.7
6X-1, bottom 17.7
–64.6 –3.4
8H-2, 102–112 32.9
–66.4 1.4
8H-2, 117–127 33.0 431 –63.5 1.4
204-1250C-
1H-CC 1.4 1,163 –66 –5.4
2H-CC 6.5 1,513 –64.8 6.7
11H-3, 120 86.7 22,742 –67.4 –3.6
12H-1, 50 92.5
–66.8 –12.7
204-1250D-
1H-1? 1.0 1,329 –65.5 –18.3
1H-2, 14–17 1.6 1,156 –65.6 3.5
10H-3, 53–84 81.5 45,456 –69.4 1.1
204-1250F-
1H-1, 23 100.2 33,981 –70.2 0.5

Notes: PDB = Peedee belemnite. Blank = no analysis.