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Table T7. Concentrations of hydrocarbons observed in safety gas vials, Site C0017.

Core, section,
interval (cm) 		Depth
(mbsf) 		CH4 in
headspace
(ppm) 		C2H6 in
headspace
(ppm) 		C3H8 in
headspace
(ppm) 		Butane, ethylene, and/or propylene
(Y or N) 		Sediment
mass
(g) 		CH4 in
pore water
(µM)
331-C0017A-
1H-1, 136–140 1.36 2.16 BD BD N 7.295 0.4
331-C0017B-
1H-1, 136.5–140.5 10.17 2.42 BD BD N 4.692 0.4
331-C0017C-
1H-1, 137–141 19.67 2.48 BD BD N 5.571 0.2
2H-1, 136–140 29.16 2.10 BD BD N 6.921 0.4
331-C0017D-
1H-1, 137–141 61.37 1.15 BD BD N 2.285 1.0
2H-1, 137–141 70.57 2.22 BD BD N 3.331 0.6
6X-1, 124–128 95.44 2.80 BD BD N 6.788 0.2
7H-2, 137–141 106.48 2.76 BD BD N 5.099 0.2
8T-CC, 5–9 112.25 3.84 BD BD N 0.693 3.4
9X-3, 0–4 123.13 2.12 BD BD N 6.121 0.2
10X-2, 137–141 133.49 15.45 BD BD N 3.703 2.2
11X-1, 136.5–140.5 141.57 16.01 BD BD N 6.208 1.3

 

BD = below detection.

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