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Table T23. H2 concentration in sediment samples, determined by incubation method, Hole C0012A. (See table note.)

Core, section,
interval (cm) 		Depth
CSF (m) 		T
(°C) 		1/β t
(h) 		Replicate 1 Replicate 2 Replicate 3
H2 in
headspace
gas (ppmv) 		H2 in
interstitial
water (nM)		 H2 in
headspace
gas (ppmv)		 H2 in
interstitial
water (nM)		 H2 in
headspace
gas (ppmv)		 H2 in
interstitial
water (nM)
322-C0012A-
7R-5, 80–90 107.60 15 62.96 0 0.28 0.19 0.40 0.27 0.62 0.42
169.3 0.40 0.27 1.85 1.24 0.84 0.56
221.1 0.48 0.32 1.34 0.90 0.96 0.64
298.1 0.53 0.35 1.16 0.78 0.58 0.39
19R-2, 15–25 217.25 15 62.96 0 1.30 0.88 0.82 0.55 0.64 0.43
74.9 1.55 1.04 0.79 0.53 1.24 0.83
126.6 1.84 1.23 1.19 0.80 1.16 0.78
203.7 2.19 1.47 1.21 0.81 0.88 0.59
22R-2, 12.5–26 245.73 15 62.96 0.0 2.42 1.62 0.49 0.33 0.47 0.32
50.4 1.31 0.88 1.14 0.77 0.59 0.40
102.1 1.71 1.15 0.77 0.52 0.69 0.46
179.1 1.72 1.16 0.70 0.47 0.48 0.32
25R-2, 15–25 274.12 20 64.07 0.0 0.22 0.14 1.09 0.70 0.32 0.20
50.2 0.24 0.16 1.15 0.74 0.58 0.37
101.7 0.31 0.20 1.36 0.87 0.75 0.48
178.5 0.26 0.17 1.14 0.73 0.97 0.62
29R-3, 58.5–68.5 313.21 20 64.07 0.0 1.66 1.07 0.30 0.19 0.89 0.57
49.2 1.57 1.01 0.56 0.36 1.20 0.77
101.9 1.73 1.11 0.60 0.38 1.45 0.93
177.9 1.76 1.13 0.72 0.46 1.25 0.80
32R-2, 58.5–68.5 340.77 20 64.07 0.0 0.66 0.42 1.17 0.75 0.42 0.27
48.5 1.50 0.96 1.98 1.27 0.44 0.28
100.2 1.75 1.12 1.66 1.06 0.51 0.33
177.2 2.30 1.47 1.38 0.89 0.71 0.45
35R-2, 15–25 367.01 25 66.68 0.0 1.48 0.90 0.60 0.37 0.70 0.43
47.9 2.47 1.52 0.85 0.52 1.08 0.67
99.6 1.45 0.89 0.72 0.44 1.16 0.71
176.6 1.26 0.77 1.37 0.84 0.75 0.46
40R-4, 0–11 417.46 25 66.68 0.0 0.48 0.30 1.05 0.65 1.46 0.89
47.3 0.77 0.47 1.81 1.11 1.28 0.79
99.0 0.99 0.61 2.18 1.33 1.54 0.94
176.0 0.92 0.57 1.95 1.20 1.77 1.09
45R-3, 48–56.5 464.60 30 68.07 0.0 1.53 0.90 0.84 0.50 2.49 1.47
47.3 2.44 1.44 2.44 1.44 5.52 3.26
99.0 2.47 1.46 2.07 1.22 5.07 3.00
176.0 2.05 1.21 1.65 0.97 4.05 2.39

Note: T = incubation temperature, β = experimentally determined solubility constant corrected for temperature and salinity (Crozier and Yamamoto, 1974), t = duration of incubation.

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