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Table T19. Headspace sample hydrocarbon concentrations, Holes U1386A–U1386C.
Core,
section
|
Depth
(mbsf)
|
Concentration (ppmv)
|
|
Methane
|
Ethene
|
Ethane
|
|
339-U1386A-
|
|
1H-3
|
3.00
|
6.1
|
—
|
—
|
|
2H-7
|
12.47
|
21.3
|
—
|
—
|
|
3H-7
|
22.32
|
11,684.0
|
—
|
—
|
|
4H-7
|
31.85
|
28,919.0
|
—
|
—
|
|
5H-7
|
41.35
|
47,727.0
|
—
|
0.75
|
|
6H-6
|
49.32
|
38,216.0
|
—
|
—
|
|
7H-7
|
60.31
|
29,135.0
|
—
|
—
|
|
8H-7
|
69.70
|
27,448.0
|
—
|
0.48
|
|
9H-7
|
79.37
|
16,843.0
|
—
|
—
|
|
10H-7
|
88.98
|
8,109.2
|
—
|
—
|
|
11H-7
|
96.23
|
3,303.7
|
—
|
—
|
|
12H-7
|
107.87
|
9,467.0
|
—
|
—
|
|
13H-7
|
117.14
|
3,891.4
|
—
|
—
|
|
14H-6
|
125.42
|
25,855.0
|
—
|
1.09
|
|
15H-7
|
136.15
|
3,942.5
|
—
|
—
|
|
16H-5
|
142.75
|
5,690.2
|
—
|
—
|
|
17H-5
|
149.96
|
7,394.6
|
—
|
—
|
|
18H-6
|
159.09
|
6,230.3
|
—
|
—
|
|
20H-8
|
176.96
|
11,134.0
|
0.67
|
0.89
|
|
21H-5
|
181.37
|
6,795.8
|
—
|
—
|
|
22X-4
|
187.60
|
5,879.1
|
—
|
—
|
|
23X-7
|
194.32
|
12,622.0
|
—
|
1.26
|
|
24X-7
|
204.50
|
8,292.5
|
0.48
|
1.44
|
|
26X-7
|
223.93
|
11,488.0
|
0.54
|
1.26
|
|
27X-6
|
231.84
|
4,766.1
|
—
|
—
|
|
28X-6
|
241.03
|
5,624.7
|
—
|
0.75
|
|
29X-7
|
252.19
|
6,940.0
|
—
|
—
|
|
30X-6
|
259.96
|
5,404.0
|
0.83
|
1.04
|
|
31X-6
|
269.42
|
8,233.9
|
0.00
|
1.17
|
|
32X-7
|
281.21
|
6,719.2
|
0.00
|
1.16
|
|
33X-5
|
288.40
|
5,813.4
|
0.00
|
1.00
|
|
34X-6
|
299.25
|
7,730.9
|
0.88
|
2.10
|
|
35X-5
|
307.60
|
14,535.0
|
0.84
|
3.10
|
|
36X-6
|
317.42
|
8,556.3
|
0.00
|
1.62
|
|
37X-7
|
329.01
|
7,483.9
|
0.00
|
2.05
|
|
38X-6
|
337.60
|
8,314.7
|
1.06
|
3.48
|
|
39X-7
|
348.45
|
5,963.4
|
0.58
|
1.99
|
|
339-U1386B-
|
|
39X-7
|
358.10
|
11,109.0
|
1.76
|
6.01
|
|
40X-7
|
368.31
|
10,204.0
|
1.44
|
4.62
|
|
41X-7
|
377.54
|
5,221.4
|
—
|
1.24
|
|
42X-7
|
387.27
|
5,111.5
|
0.55
|
2.36
|
|
43X-7
|
397.00
|
6,436.2
|
—
|
1.20
|
|
44X-5
|
403.95
|
1,446.6
|
—
|
0.75
|
|
46X-5
|
422.70
|
5,476.8
|
—
|
1.42
|
|
47X-2
|
428.00
|
8,367.9
|
—
|
4.89
|
|
48X-6
|
442.76
|
3,876.2
|
—
|
2.11
|
|
49X-3
|
448.90
|
4,691.9
|
—
|
2.94
|
|
339-U1386C-
|
|
7R-5
|
420.60
|
1,191.4
|
—
|
—
|
|
8R-2
|
425.21
|
2,716.2
|
—
|
1.56
|
|
9R-4
|
437.84
|
2,488.1
|
—
|
1.31
|
|
10R-6
|
450.61
|
5,304.3
|
—
|
2.33
|
|
11R-1
|
452.90
|
3,812.2
|
—
|
1.71
|
|
12R-3
|
465.40
|
3,924.3
|
0.41
|
3.40
|
|
13R-3
|
475.00
|
2,654.1
|
1.07
|
5.42
|
|
14R-3
|
484.60
|
2,658.2
|
0.79
|
5.82
|
|
15R-5
|
496.90
|
4,452.1
|
0.69
|
9.31
|
|
16R-5
|
506.50
|
1,618.9
|
0.46
|
2.60
|
|
18R-4
|
524.20
|
3,968.6
|
1.31
|
11.53
|