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Table T13. Headspace methane concentration, ethane concentration, and the ratios of methane to ethane (C1/C2), Hole C0018A.
Core, section,
interval (cm)
|
Depth
(mbsf)
|
Methane (ppmv)
|
Ethane
(ppmv)
|
C1/C2
|
|
333-C0018A-
|
|
1H-1, 75–79
|
0.7
|
0.0
|
0.0
|
100,000
|
|
2H-1, 124–128
|
7.8
|
6.7
|
0.0
|
100,000
|
|
3H-1, 137–141
|
17.4
|
12,093.6
|
0.0
|
100,000
|
|
4H-1, 146–150
|
27.0
|
7,769.1
|
0.0
|
100,000
|
|
5H-1, 137.5–141.5
|
36.4
|
18,073.1
|
1.4
|
13,008
|
|
6H-1, 136.5–140.5
|
45.9
|
15,255.0
|
1.4
|
11,011
|
|
7H-1, 136–140
|
55.4
|
7,666.7
|
0.0
|
100,000
|
|
8H-2, 142.5–146.5
|
65.2
|
5,961.9
|
0.0
|
100,000
|
|
10H-2, 137–141
|
81.8
|
5,552.1
|
0.0
|
100,000
|
|
11H-2, 132–136
|
91.3
|
4,843.5
|
0.0
|
100,000
|
|
12H-2, 119.5–123.5
|
100.9
|
4,332.4
|
0.0
|
100,000
|
|
13H-3, 136–140
|
110.3
|
3,281.6
|
0.0
|
100,000
|
|
14H-2, 135.5–139.5
|
119.7
|
5,101.0
|
0.0
|
100,000
|
|
15H-2, 114.5–118.5
|
127.7
|
2,823.9
|
0.0
|
100,000
|
|
17H-1, 136.5–140.5
|
145.9
|
5,503.8
|
0.0
|
100,000
|
|
18H-1, 124–128
|
154.8
|
4,428.3
|
0.0
|
100,000
|
|
19H-1, 133.5–137.5
|
160.8
|
5,583.1
|
0.0
|
100,000
|
|
20H-2, 125.5–129.5
|
166.1
|
919.4
|
0.0
|
100,000
|
|
21H-1, 136.5–140.5
|
175.4
|
4,270.1
|
0.0
|
100,000
|
|
22H-1, 42–46
|
178.9
|
7,729.8
|
1.6
|
4,808
|
|
24T-1, 136.5–140.5
|
192.0
|
2,309.8
|
0.0
|
100,000
|
|
25T-1, 137–141
|
201.5
|
19,338.7
|
1.6
|
11,926
|
|
27T-2, 142.5–146.5
|
220.9
|
6,522.1
|
0.0
|
100,000
|
|
29T-1, 134.5–138.5
|
239.5
|
14,496.4
|
1.4
|
10,228
|
|
30T-1, 137.5–141.5
|
249.0
|
5,693.6
|
0.0
|
100,000
|
|
31X-1,113.5–117.5
|
258.3
|
9,916.7
|
0.0
|
100,000
|
|
33X-4, 0–4
|
278.9
|
7,904.3
|
0.0
|
100,000
|
|
34X-3, 33.5–37.5
|
288.6
|
8,328.3
|
0.0
|
100,000
|
|
35X-2, 134–138
|
297.4
|
5,888.8
|
1.4
|
4,139
|
|
36X-2, 81–84
|
305.7
|
6,891.9
|
0.0
|
100,000
|
Methane and ethane are set at 0.0 when below detection. C1/C2 is set at 100,000 when ethane concentration is below detection.
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