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Table T7. Concentrations of hydrocarbons observed in safety gas vials, Site C0013.

Hole, 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) 		C2H6 in
pore water
(µM)
331-
C0013B-1T-1, 114–118 1.14 117.9 BD BD N 5.044 86.2 BD
C0013F-1H-3, 0–4 1.19 1466.0 0.8 BD N 5.473 583.2 0.3
C0013D-1H-1, 73.5–77.5 3.74 507.4 BD BD N 5.631 174.9 BD
C0013E-1H-6, 0–4 4.71 10.6 BD BD N 5.779 8.5 BD
C0013E-1H-6, 109.5–113.5 5.80 115.7 BD BD N 7.538 68.5 BD
C0013F-1H-9, 0–4 7.18 1177.2 0.5 BD Y 2.017 1491.8 0.7
C0013G-1H-1, 0–4 7.50 16.8 BD BD N 6.610 9.8 BD
C0013C-1H-12, 0–4 8.28 2075.3 0.8 BD N 5.144 691.5 0.3
C0013H-1H-2, 0–4 9.36 51.0 BD BD N 9.235 15.0 BD
C0013E-2H-1, 95.5–99.5 9.46 407.1 0.2 BD N 6.838 326.4 0.2
C0013E-3X-CC, 14.5–18.5 9.85 37.5 BD BD N 9.488 11.1 BD
C0013C-1H-15, 42–46 11.76 830.5 BD BD N 4.583 396.8 BD
C0013E-4X-CC, 7–11 12.77 3187.7 0.5 BD Y 8.117 640.9 0.1
C0013D-2H-1, 98–102 13.48 4.1 BD BD N 11.854 0.4 BD
C0013E-5H-1, 124.5–128.5 17.25 745.1 1.1 0.7 Y 4.336 293.0 0.4
C0013D-3T-1, 29.5–33.5 22.30 11.7 BD BD N 2.117 166.7 BD
C0013E-6X-CC, 0–4 23.00 1372.7 0.2 BD N 5.734 338.1 BD
C0013E-7L-1, 0–4 26.00 169.5 1.1 0.4 Y 6.835 163.8 1.1
C0013D-4X-CC, 25–29 26.36 140.8 BD BD N 6.774 139.1 BD
C0013E-9X-CC, 0–4 45.07 145.5 BD BD N 7.636 190.0 BD

BD = below detection.

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