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Table T5. Hydrocarbon headspace gas concentrations, Holes U1325B, U1325C, and U1325D.

Core, section,
interval (cm)
Depth
(mbsf)
C1/C2 C1
(ppmv)
C2
(ppmv)
C2=
(ppmv)
C3
(ppmv)
C1
(mM)*
311-U1325B-
1H-1, 80–85 0.80
10 0 0 0 0.00
1H-2, 0–5 1.50
1,128 0 0 0 0.48
1H-2, 80–85 2.30
5,020 0 0 0 2.20
1H-3, 0–5 3.00
7,112 0 0 0 3.21
1H-3, 75–80 3.75
9,713 0 0 0 4.52
1H-4, 0–5 4.50
12,309 0 0 0 5.92
1H-4, 80–85 5.30
12,996 0 0 0 6.49
1H-5, 0–5 6.00
9,696 0 0 0 5.00
1H-5, 80–85 6.80
13,208 0 0 0 7.09
1H-6, 0–5 7.50
13,911 0 0 0 7.74
1H-6, 80–85 8.30
3,659 0 0 0 2.12
1H-7, 0–5 9.00
2,748 0 0 0 1.66
2H-3, 0–5 12.30
10,931 0 0 0 7.41
2H-7, 0–5 18.30
7,504 0 0 0 5.02
3X-1, 145–150 20.25
3,733 0 0 0 2.48
4H-3, 0–5 26.82
5,915 0 0 0 3.88
4H-6, 0–5 31.32
7,722 0 0 0 5.01
5H-3, 0–5 36.42
4,051 0 0 0 2.60
5H-6, 0–5 40.92
4,491 0 0 0 2.85
6H-3, 0–5 46.00
7,252 0 0 0 4.56
6H-6, 0–5 50.50
4,834 0 0 0 3.01
7H-4, 0–5 57.00
4,589 0 0 0 2.82
7H-6, 0–5 60.00
4,500 0 0 0 2.75
8H-4, 0–5 66.26
4,651 0 0 0 2.80
8H-6, 0–5 69.26
3,401 0 0 0 2.04
9X-1, 137–142 72.87
2,267 0 0 0 1.21
10X-4, 0–5 77.30
2,817 0 0 0 1.39
10X-5, 117–121 79.97
2,755 0 0 0 1.44
12X-3, 0–5 87.40
3,785 0 0 0 2.38
12X-4, 63–68 89.53
2,172 0 0 0 1.45
13X-CC, 10–15 93.53
3,459 0 0 0 2.60
14X-3, 0–5 105.30
3,730 0 0 0 2.01
14X-6, 25–30 109.88
2,794 0 0 0 1.70
15X-2, 120–125 114.40
3,119 0 0 0 2.17
15X-3, 14–19 114.84
3,685 0 0 0 2.60
16X-3, 0–5 124.30
4,755 0 0 0 2.88
16X-5, 0–5 126.15
3,165 0 0 0 1.80
16X-7, 0–5 128.15
3,593 0 0 0 1.92
18X-2, 0–5 132.40
3,539 0 0 0 1.91
18X-2, 121–126 133.61
2,086 0 0 0 1.13
19X-3, 16–21 143.66
2,122 0 0 0 1.18
19X-5, 0–5 145.30
2,027 0 0 0 1.14
20X-3, 40–45 153.60
2,081 0 0 0 1.19
20X-6, 0–5 156.84
4,007 0 0 0 2.32
21X-1, 32–37 160.12
2,379 0 0 0 1.39
21X-3, 0–5 161.81
1,094 0 0 0 0.64
23X-2, 0–5 171.90
1,850 0 0 0 1.12
24X-2, 0–5 180.39
1,966 0 0 0 1.23
24X-3, 0–5 181.77
2,335 0 0 0 1.46
311-U1325C-
1X-2, 0–5 190.30
3,119 0 0 0 2.01
1X-2, 136–141 191.66
3,683 0 0 0 2.38
2X-1, 5–7 198.45
25,679 0 0 0 17.01
2X-1, 8–10 198.48
2,285 0 0 0 1.51
4X-2, 0–5 209.24
4,166 0 0 0 2.82
4X-4, 0–5 210.92
3,244 0 0 0 2.19
6X-2, 0–5 218.89
5,283 0 0 0 3.52
7X-2, 50–55 229.20
4,172 0 0 0 2.74
7X-4, 64–69 231.84
4,040 0 0 0 2.65
8X-2, 72–75 239.02
11,017 0 0 0 7.15
8X-3, 0–5 239.15
2,785 0 0 0 1.81
8X-4, 50–55 241.15
5,061 0 0 0 3.27
9X-2, 95–100 248.95 5,898 3,539 0.6 0 0 2.26
9X-4, 106–111 252.06 8,020 5,614 0.7 0 0 3.58
9X-4, 120–123 252.20
4,775 0 0 0 3.04
11X-2, 100–105 259.60
2,063 0 0 0 1.30
11X-5, 45–50 263.55
2,801 0 0 0 1.76
12X-1, 145–150 267.25
3,671 0 0 0 2.29
14X-3, 0–5 286.70 6,350 2,540 0.4 0 0 1.54
15X-2, 90–95 297.04
2,901 0 0 0 1.74
15X-4, 0–5 298.43 4,277 3,849 0.9 0 0 2.31
311-U1325D-
1H-1, 135–140 1.35
4.0 0 0 0 0.00
1H-2, 135–140 2.85
5.0 0 0 0 0.00
1H-3, 125–130 4.25
16.6 0 0 0 0.01

Note: * = dissolved residual methane obtained by the headspace equilibration method.

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