Table T4. Concentrations of methane, ethane, ethylene, and propane in headspace gas, Hole 1246B.
Core, section,
interval (cm)
Depth
(mbsf)
C1
(ppmv)
C2
(ppmv)
C2=
(ppmv)
C3
(ppmv)
C1/C2
C1
(mM)
204-1246B-






1H-1, 0-5 0.00 18



0.004
1H-2, 0-5 1.50 8



0.002
1H-3, 0-5 3.00 3



0.001
2H-3, 0-5 7.70 4,879 1.2 0.6
4,135 0.8
2H-6, 0-5 12.20 60,636 1.7 0.8
36,749 8.2
3H-3, 0-5 17.20 24,914 1.2 0.5
20,936 3.7
3H-6, 0-5 21.70 17,611 1.3 0.6
13,977 2.5
4H-3, 0-5 26.70 15,711 1.0

15,403 2.6
4H-6, 0-5 31.20 29,532 1.4 0.6
20,945 4.0
5H-3, 0-5 36.20 13,865 1.1

13,080 2.5
5H-6, 0-5 40.70 16,757 1.0

17,099 2.9
6H-3, 0-5 45.67 25,858 1.3

20,361 4.2
6H-6, 0-5 50.10 17,368 0.6

29,437 2.7
7H-3, 0-5 55.09 12,921



2.5
7H-6, 0-5 59.59 13,624



2.6
8H-3, 0-5 64.70 9,877
0.4

1.6
8H-6, 0-5 69.20 10,887



2.2
9H-3, 0-5 73.91 13,192 0.5 0.6
24,430 2.7
9H-6, 0-5 78.41 12,499 0.5 0.7
24,998 2.7
10H-3, 0-5 83.70 21,638 1.6 0.4
13,609 4.1
10H-6, 0-5 88.12 11,259 0.4

31,275 2.5
11H-3, 0-5 93.20 15,995 0.7 0.7
22,528 3.5
11H-5, 0-5 95.71 14,398 0.7 0.7
20,569 2.9
12H-3, 0-5 102.70 10,436 0.7

16,055 2.2
12H-6, 0-5 106.83 22,934 3.8

6,019 4.1
13H-3, 0-5 112.20 17,540 9.4 0.3 12.8 1,864 4.0
14H-3, 0-5 121.70 11,805 24.6
22.2 480 2.7
15X-4, 0-5 126.75 22,287 50.2 0.5 29.7 444 3.7
16X-3, 0-5 132.80 13,269 40.2
24.7 330 3.4
16X-5, 0-5 135.80 24,932 65.5 0.6 40.1 381 4.9

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