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Table T7. Gas geochemistry, Site U1379.

Average
depth
(mbsf)		 Sample
type		 CH4
(ppmv)		 C2H4
(ppmv)		 C2H6
(ppmv)		 C3H6 + C3H8
(ppmv)		 iso-C4H10
(ppmv)		 n-C4H10
(ppmv)		 iso-C5H12
(ppmv)		 n-C5H12
(ppmv)
CH4/(C2H6 + C3H8)
1.39 NZ 3.70 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ND
2.84 NZ 2.54 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ND
4.39 NZ 3.17 0.0 0.0 1.2 0.6 0.0 0.0 0.0 ND
5.84 NZ 3.21 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ND
6.49 NZ 3.39 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ND
8.09 NZ 2.87 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ND
9.59 NZ 3.19 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ND
11.09 NZ 2.61 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ND
12.59 NZ 2.48 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ND
14.09 NZ 2.59 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ND
14.55 NZ 2.72 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ND
17.57 NZ 4.88 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ND
19.07 NZ 2.64 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ND
20.57 NZ 3.35 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ND
22.07 NZ 6.03 0.0 0.0 0.0 0.0 0.0 0.0 0.5 ND
23.57 NZ 5.98 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ND
24.08 NZ 4.44 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ND
27.04 NZ 3.30 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ND
29.56 NZ 4.60 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ND
39.32 NZ 15.43 0.0 0.0 0.0 0.0 0.0 0.6 0.0 ND
42.32 NZ 1,226.60 0.0 0.0 0.0 0.0 0.0 0.7 0.0 ND
48.29 NZ 3,129.05 0.0 0.0 0.7 0.3 0.0 0.9 0.0 4,771.53
54.83 NZ 4,913.62 0.0 0.6 0.0 0.0 0.0 0.6 0.0 8,232.42
61.21 NZ 4,807.16 0.0 0.6 0.0 0.0 0.0 0.0 0.0 8,225.89
62.31 NZ 5,215.17 0.0 0.6 0.0 0.0 0.0 0.0 0.0 9,012.39
67.21 NZ 13,233.84 0.0 1.3 0.0 0.0 0.0 0.0 0.0 10,289.91
73.16 NZ 12,320.66 0.0 1.5 0.0 0.0 0.0 0.0 0.0 8,392.04
76.51 NZ 13,510.23 0.0 2.2 0.0 0.0 0.0 0.0 0.0 6,167.13
81.51 NZ 11,026.81 0.0 1.6 0.0 0.0 0.0 0.0 0.0 6,926.76
86.08 NZ 2,651.57 0.0 0.6 0.0 0.0 0.0 0.0 0.0 4,687.36
89.31 NZ 12,838.62 0.0 2.2 0.0 0.0 0.0 0.0 0.0 5,957.19
90.89 NZ 3,973.59 0.0 0.6 0.0 0.0 0.0 0.0 0.0 6,234.31
115.01 NZ 7,078.96 0.0 1.6 0.0 0.0 0.0 0.0 0.0 4,451.79
138.02 NZ 1,656.88 0.0 0.7 ND ND 0.0 0.0 0.0 2,360.25
141.47 NZ 5,168.49 0.0 1.5 ND ND 0.0 0.0 0.0 3,562.85
158.63 NZ 6,583.04 ND 1.8 1.2 0.7 0.9 1.3 1.9 2,246.98
166.97 NZ 3,778.29 ND 1.5 0.0 0.0 0.0 0.0 0.0 2,471.88
178.12 NZ 5,060.56 ND 1.8 0.0 0.0 0.0 0.0 0.0 2,750.69
187.92 NZ 7,488.91 ND 3.0 0.0 0.0 0.0 0.0 0.0 2,527.02
196.62 NZ 5,395.71 ND 2.2 0.0 0.0 0.0 0.0 0.0 2,438.22
204.51 NZ 11,334.34 ND 3.4 0.4 0.0 0.0 0.0 0.0 2,985.69
215.41 NZ 4,270.85 ND 2.1 0.0 0.0 0.0 0.0 0.0 2,055.10
223.81 NZ 6,368.38 ND 2.8 1.1 0.5 0.8 1.1 1.3 1,630.92
235.11 NZ 7,802.60 ND 3.6 1.8 0.0 0.0 0.0 23.6 1,458.34
341.39 NZ 3,223.09 ND 2.1 1.2 0.0 0.0 0.0 0.0 987.82
350.75 NZ 7,800.17 ND 5.4 3.3 ND ND ND 0.0 899.08
358.26 NZ 7,217.43 ND 5.4 4.0 ND 0.4 ND 0.0 763.71
368.43 NZ 6,158.45 ND 4.5 3.3 ND 0.4 ND 0.0 790.02
378.01 NZ 7,600.70 ND 6.4 4.3 ND ND ND ND 708.56
386.71 NZ 4,288.35 ND 3.5 2.9 ND ND ND ND 671.72
395.83 NZ 2,036.47 ND 1.7 1.4 0.0 0.0 0.0 0.0 647.36
405.07 NZ 3,856.66 ND 3.2 2.1 0.3 0.3 0.7 0.0 719.92
412.52 NZ 1,296.66 ND 1.6 1.6 0.4 0.0 1.0 0.0 410.60
420.06 NZ 8,344.84 ND 9.5 10.5 2.3 1.3 6.1 0.7 416.52
430.36 NZ 7,384.96 ND 6.9 6.8 1.2 0.7 3.2 0.3 537.23
439.60 NZ 1,402.40 ND 1.6 1.8 0.3 0.0 0.8 0.0 406.48
448.05 NZ 1,419.54 ND 1.6 1.4 0.0 0.0 0.0 0.0 478.03
458.68 NZ 2,853.04 ND 3.4 1.7 0.4 0.0 0.3 0.0 558.40
467.56 NZ 3,993.23 ND 3.5 1.2 0.0 0.0 0.3 0.0 856.12
480.87 NZ 8,588.63 ND 4.5 0.5 0.0 0.0 0.0 0.0 1,735.58
486.64 NZ 8,781.10 ND 6.8 0.6 0.0 0.0 0.0 0.0 1,197.57
493.68 NZ 4,532.04 ND 2.6 0.0 0.0 0.0 0.0 0.0 1,777.03
507.56 NZ 3,142.06 ND 2.2 1.0 0.5 0.0 0.7 0.0 976.39
514.46 NZ 1,139.08 ND 0.9 0.9 0.4 0.0 1.0 0.0 639.59
525.23 NZ 5,584.21 ND 5.8 6.8 2.3 0.7 3.6 0.0 444.87
545.06 NZ 3,512.26 ND 3.8 5.6 1.6 0.5 1.8 0.0 372.90
554.53 NZ 6,219.53 ND 7.2 10.9 3.2 0.8 3.5 0.0 344.89
563.78 NZ 5,962.68 ND 6.9 8.2 1.7 0.4 1.5 0.0 394.97
573.68 NZ 5,515.73 ND 6.2 8.0 1.4 0.5 1.5 0.0 388.63
578.31 NZ 1,051.66 ND 0.9 0.9 0.0 0.0 0.0 0.0 588.61
589.70 NZ 6,142.59 ND 4.3 2.7 0.0 0.0 0.0 0.0 873.89
598.52 NZ 936.17 ND 2.5 4.3 1.2 0.3 1.7 0.0 136.59
605.26 NZ 4,145.33 ND 6.2 9.2 4.0 0.8 5.4 0.4 270.82
619.54 NZ 3,398.52 ND 6.0 8.5 4.2 0.5 4.3 0.0 233.44
626.32 NZ 5,608.92 ND 8.0 9.2 3.6 0.5 2.0 0.0 326.91
636.30 NZ 2,089.75 ND 4.1 6.2 2.8 0.5 1.6 0.0 202.79
656.58 NZ 4,641.12 ND 7.8 10.2 3.2 3.4 0.3 1.2 258.54
664.96 NZ 5,200.45 ND 7.8 9.5 2.9 0.4 1.1 0.0 300.30
674.72 NZ 5,801.58 ND 9.6 12.4 4.4 0.7 2.5 0.0 263.59
681.98 NZ 7,924.37 ND 11.3 14.5 5.7 2.3 5.0 3.1 307.09
692.58 NZ 4,670.33 ND 8.9 10.4 2.8 0.9 2.0 0.0 241.88
699.78 NZ 2,492.71 ND 3.9 5.3 1.3 0.9 1.4 1.0 273.30
712.39 NZ 3,191.88 ND 2.6 2.7 1.0 0.5 1.2 0.0 596.99
717.15 NZ 1,286.06 ND 2.0 2.8 1.0 0.5 0.6 0.0 265.67
733.27 NZ 10,048.24 ND 10.1 8.2 2.8 0.9 1.7 0.0 548.83
772.14 NZ 7,517.90 ND 7.6 5.7 3.6 0.1 1.5 0.0 567.92
780.25 NZ 5,993.83 ND 5.7 4.6 2.9 0.3 0.9 0.0 584.06
785.53 HS 3,616.59 0.0 3.5 2.9 2.0 0.3 0.8 0.0 566.29
795.04 HS 4,411.44 0.0 4.6 5.7 4.8 0.4 2.2 0.0 427.62
807.46 NZ 1,515.16 ND 1.4 1.3 1.0 0.0 0.4 0.0 559.21
815.13 NZ 4,917.51 ND 6.2 4.7 3.9 0.9 1.1 0.0 451.41
824.76 NZ 1,502.31 ND 3.2 2.9 2.2 0.0 0.5 0.0 245.90
837.24 NZ 1,352.89 ND 1.2 1.3 1.0 0.4 0.6 0.0 554.92
852.64 NZ 3,696.37 ND 4.1 3.1 2.3 0.0 0.8 0.0 513.66
865.26 NZ 5,061.85 ND 5.2 2.9 1.7 0.0 0.6 0.0 625.26
877.38 NZ 7,630.09 ND 14.1 5.4 2.2 ND 0.8 0.0 392.83
890.21 HS 3,708.49 ND 2.3 0.4 0.0 0.0 0.0 0.0 1,363.62
899.40 HS 1,201.20 ND 1.2 0.0 0.0 0.0 0.0 0.0 962.12
929.51 HS 9,629.98 ND 9.0 2.6 1.0 0.0 0.4 0.0 833.90
930.00 HS 3,115.64 ND 3.4 0.8 ND ND ND 0.0 742.75
937.72 NZ 1,710.36 ND 0.9 0.4 0.0 0.0 0.2 0.0 1,290.19
944.05 NZ 5,722.62 ND 5.0 0.5 0.0 0.0 0.0 0.0 1,043.38
947.22 NZ 10,634.51 ND 6.8 0.5 0.0 0.0 0.0 0.0 1,456.07

HS = headspace sample, NZ = additional sample taken for onshore analysis (see “Geochemistry”). ND = not detectable.

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