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Table T17. Headspace sample hydrocarbon concentrations, Holes U1387A and U1387C.

Core,
section
Depth
(mbsf)
Concentration (ppmv)
Methane
Ethene
Ethane
Propane
339-U1387A-
1H-4 4.03 6.29 1.28 2.41
2H-7 14.00 19.68
3H-7 23.41 8,325.81
4H-7 32.70 24,284.58
5H-6 41.00 35,145.86 0.69
6H-3 45.83 39,894.36 0.84
7X-3 50.70 41,831.39 0.44 0.65
8X-5 61.90 41,219.69 0.75 1.16
9X-6 72.60 22,657.08 0.6 0.87
10X-3 77.70 12,063.99 0.64
11X-6 91.80 17,120.88 0.72
12X-6 101.40 36,832.83 0.73 1.3
13X-6 111.00 7,675.13 0.42
14X-6 120.60 7,863.61 0.59 0.74
15X-6 130.10 5,417.50
16X-6 139.57 9,123.00 0.48
17X-6 149.30 6,956.58 0.47 0.78
19X-6 168.40 5,800.91 0.74
20X-5 176.39 5,652.99 0.77
21X-6 187.60 5,956.83 0.6
22X-6 196.02 8,038.69 1.06
23X-5 205.20 7,047.00 0.72 1.3
24X-6 215.24 9,767.75 1.22
25X-5 224.40 4,892.02 0.84
26X-5 234.00 4,590.35 0.58 1.15
27X-5 243.60 6,152.62 0.94
28X-5 253.20 6,304.52 0.53 1.25
29X-6 263.25 7,781.56 0.73 2.02
30X-4 270.90 7,188.73 0.54 1.62
31X-4 280.50 7,537.51 0.72 1.59
32X-5 291.60 7,494.80 1.02
33X-7 304.20 6,209.83 1.34
34X-7 313.54 6,858.81 1.17
35X-7 322.74 7,587.59 0.45 1.6
36X-8 332.52 6,806.71 1.44
37X-7 341.78 6,713.03 1.3
38X-7 351.75 6,432.03 1.17
339-U1387C-
8R-5 353.61 5,206.31 0.89 3.12
9R-4 361.70 7,389.15 0.53 2.93
10R-5 372.80 8,054.09 0.96 3.67
11R-6 383.79 4,459.89 0.72 2.7
12R-5 392.00 4,586.16 2.42
13R-5 401.60 3,087.04 0.44 2.4
14R-4 409.70 1,864.57 1.87
15R-6 422.30 6,531.16 1.71
16R-5 429.90 1,217.91 0.93
17R-2 435.40 1,053.21 0.57
18R-7 451.92 985.52 1.08
19R-4 458.44 2,778.71 0.7 3.77
20R-7 471.60 1,051.47 0.49 1.6
21R-5 478.20 1,574.03 0.9
22R-4 486.30 6,352.14 0.99 5.46
23R-4 495.90 6,591.08 0.56 3.83
24R-5 507.00 2,932.36 1.26 5.81
25R-4 515.10 3,804.61 4.51 8.89
26R-4 524.40 5,439.01 0.77 7.93
27R-4 534.00 5,838.54 1.3 5.37
28R-3 542.10 5,658.66 0.59 3.93
29R-5 554.70 3,213.68 0.64 3.81
30R-5 564.05 1,484.70 0.43 2.38
31R-4 572.40 1,003.81 1.61
32R-6 585.00 73.63
33R-7 596.10 3,477.37 0.59 6.35 8.73
34R-5 602.70 2,820.63 2.92
35R-7 615.30 1,093.04 2.52
36R-3 618.90 3,108.09 3.8
37R-5 631.50 2,375.27 1.53 8.18
38R-5 641.10 7,402.68 1.35 18.85
39R-3 647.70 7,569.26 1.03 9.21
40R-4 658.80 4,730.59 1.36 9.38
41R-2 665.40 8,093.09 0.7 10.03
42R-4 678.00 8,150.32 1.2 10.26
43R-2 684.68 5,817.39 0.42 8.06
48R-5 736.81 3,155.65 3.91
49R-5 746.80 5,142.44 13.58
50R-2 751.59 742.83 1.68
51R-5 764.90 1,220.62 1.97
52R-2 770.99 13,634.46 0.53 11.35
53R-4 783.36 6,377.92 0.73 9.86
54R-2 790.26 5,309.70 0.64 9.05
55R-4 802.90 6,126.85 0.8 12.22 6.52
56R-5 814.00 17,762.29 1.07 19.76 18.43
57R-6 823.87 1,430.20 2.04
58R-5 833.20 5,518.16 4.89
59R-6 844.30 7,933.80 0.51 7.05
61R-7 865.05 10,042.83 6.96

— = no data.

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