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Table T12. Headspace (HS) gas concentrations, Site U1422.

Core, section,
interval (cm)
Top depth
CSF-A (m)
Sample
type
Sediment
volume
(cm3)
CH4
(ppmv)
measured
Ethane
(ppmv)
measured
CH4
(ppmv)
normalized
Ethane
(ppmv)
normalized
C1/C2
346-U1422C-                
1H-2, 0–5 1.50 HS 5.0 2.56 0.00 2.56 0.00  
2H-2, 0–5 6.10 HS 3.0 0.00 0.00 0.00 0.00  
2H-5, 0–5 10.60 HS 4.5 0.00 0.00 0.00 0.00  
3H-2, 0–5 15.60 HS 4.0 0.00 0.00 0.00 0.00  
3H-5, 0–5 20.10 HS 3.5 0.00 0.00 0.00 0.00  
4H-2, 0–5 25.10 HS 3.5 18.13 0.00 25.90 0.00  
4H-5, 0–5 29.58 HS 3.0 51.31 0.00 85.52 0.00  
5H-2, 0–5 34.60 HS 4.0 3,597.11 2.90 4,496.39 3.63 1,240.38
5H-5, 0–5 39.00 HS 4.0 8,359.44 5.94 10,449.30 7.43 1,407.31
6H-2, 0–5 44.10 HS 3.0 16,659.40 2.02 27,765.67 3.37 8,247.23
7H-2, 0–5 53.60 HS 3.2 16,560.17 1.73 25,875.27 2.70 9,572.35
7H-5, 0–5 58.10 HS 3.4 21,863.42 2.13 32,152.09 3.13 10,264.52
8H-2, 0–5 63.10 HS 3.2 23,808.44 3.07 37,200.69 4.80 7,755.19
8H-5, 0–5 67.60 HS 3.2 22,860.43 2.17 35,719.42 3.39 10,534.76
9H-2, 0–5 72.60 HS 3.4 24,206.85 2.41 35,598.31 3.54 10,044.34
9H-5, 0–5 76.84 HS 3.4 13,725.17 8.26 20,184.07 12.15 1,661.64
10H-3, 0–5 80.80 HS 3.4 20,217.20 2.12 29,731.18 3.12 9,536.42
10H-6, 0–5 85.39 HS 3.4 26,407.72 1.68 38,834.88 2.47 15,718.88
11H-2, 0–5 88.56 HS 3.5 7,277.57 4.16 10,396.53 5.94 1,749.42
11H-6, 0–5 94.56 HS 3.6 21,860.65 2.17 30,362.01 3.01 10,074.03
12H-2, 0–5 98.30 HS 3.4 15,729.57 9.22 23,131.72 13.56 1,706.03
12H-5, 0–5 102.90 HS 3.2 13,485.31 7.94 21,070.80 12.41 1,698.40
13H-3, 0–5 109.30 HS 3.2 22,499.11 2.16 35,154.86 3.38 10,416.25
13H-6, 0–5 113.81 HS 3.2 7,884.72 4.93 12,319.88 7.70 1,599.33
14H-2, 0–5 117.30 HS 4.0 32,208.68 2.03 40,260.85 2.54 15,866.34
14H-5, 0–5 121.82 HS 3.1 13,140.15 0.00 21,193.79 0.00  
15H-2, 0–5 126.80 HS 4.0 20,847.99 1.87 26,059.99 2.34 11,148.66
16H-2, 0–5 131.50 HS 3.0 10,620.82 6.08 17,701.37 10.13 1,746.85
17H-2, 0–5 136.20 HS 3.2 12,738.84 7.25 19,904.44 11.33 1,757.08
18H-2, 0–5 140.90 HS 4.0 28,137.87 1.72 35,172.34 2.15 16,359.23
19H-2, 0–5 145.60 HS 3.0 10,353.29 0.00 17,255.48 0.00  
20H-2, 0–5 150.30 HS 3.2 15,496.32 8.49 24,213.00 13.27 1,825.24
21H-2, 0–5 155.00 HS 3.0 15,753.39 9.11 26,255.65 15.18 1,729.24
22H-2, 0–5 159.70 HS 3.0 14,861.76 0.00 24,769.60 0.00  
23H-2, 0–5 164.40 HS 3.2 6,268.71 3.34 9,794.86 5.22 1,876.86
24H-2, 0–5 169.10 HS 2.6 8,832.01 5.53 16,984.63 10.63 1,597.11
25H-2, 0–5 173.80 HS 3.6 16,660.35 1.40 23,139.38 1.94 11,900.25
26H-2, 0–5 178.50 HS 2.8 12,284.53 7.05 21,936.66 12.59 1,742.49
27H-2, 0–5 183.19 HS 3.0 14,163.24 0.00 23,605.40 0.00  
28H-2, 0–5 187.90 HS 3.4 12,007.58 0.00 17,658.21 0.00  
29H-2, 0–5 192.59 HS 3.4 10,044.69 0.00 14,771.60 0.00  
30H-2, 0–5 197.30 HS 3.2 19,212.29 0.00 30,019.20 0.00  
31H-2, 0–5 202.00 HS 3.0 4,337.86 2.53 7,229.77 4.22 1,714.57
346-U1422E-                
3H-4, 0–5 23.50 HS 3.0 33.38 0.00 55.63 0.00  
3H-5, 0–5 25.00 HS 3.2 47.73 0.00 74.58 0.00  
3H-6, 0–5 26.50 HS 3.0 40.70 0.00 67.83 0.00  
3H-7, 0–5 28.00 HS 3.2 41.07 0.00 64.17 0.00  
4H-1, 145–150 29.95 HS 3.0 214.23 0.00 357.05 0.00  
4H-2, 145–151 31.45 HS 3.0 151.90 0.00 253.17 0.00  
4H-3, 145–152 32.95 HS 2.8 535.07 0.00 955.48 0.00  

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