Table T12. Headspace (HS) gas concentrations, Site U1423.
| Core, section, interval (cm) |
Top depth CSF-A (m) |
Sample type |
Sediment volume (cm3) |
CH4 (ppmv) measured |
CH4 (ppmv) normalized |
|---|---|---|---|---|---|
| 346-U1423A- | |||||
| 1H-2, 0–5 | 1.50 | HS | 4.00 | 7.95 | 9.94 |
| 1H-5, 0–5 | 6.00 | HS | 4.00 | 1.88 | 2.35 |
| 2H-2, 0–5 | 8.80 | HS | 2.00 | 1.73 | 4.33 |
| 2H-5, 0–5 | 13.30 | HS | 4.00 | 0.00 | 0.00 |
| 3H-2, 0–5 | 18.30 | HS | 4.00 | 3.42 | 4.28 |
| 3H-5, 0–5 | 22.80 | HS | 4.00 | 5.26 | 6.58 |
| 4H-2, 0–5 | 27.75 | HS | 3.60 | 24.41 | 33.90 |
| 4H-5, 0–5 | 32.25 | HS | 4.00 | 97.56 | 121.95 |
| 5H-2, 0–5 | 37.30 | HS | 4.00 | 155.76 | 194.70 |
| 5H-5, 0–5 | 41.80 | HS | 4.00 | 232.16 | 290.20 |
| 6H-2, 0–5 | 46.80 | HS | 4.00 | 350.17 | 437.71 |
| 6H-5, 0–5 | 51.25 | HS | 4.00 | 343.62 | 429.53 |
| 7H-2, 0–5 | 56.30 | HS | 3.20 | 665.77 | 1040.27 |
| 7H-5, 0–5 | 60.80 | HS | 4.80 | 1076.44 | 1121.29 |
| 8H-2, 0–5 | 65.80 | HS | 4.00 | 1377.24 | 1721.55 |
| 8H-5, 0–5 | 70.30 | HS | 3.00 | 1203.62 | 2006.03 |
| 9H-2, 0–5 | 75.30 | HS | 3.00 | 903.74 | 1506.23 |
| 9H-5, 0–5 | 79.80 | HS | 3.00 | 876.44 | 1460.73 |
| 10H-2, 0–5 | 84.80 | HS | 3.00 | 621.05 | 1035.08 |
| 10H-5, 0–5 | 89.30 | HS | 3.20 | 403.45 | 630.39 |
| 11H-2, 0–5 | 94.30 | HS | 3.00 | 253.79 | 422.98 |
| 11H-5, 0–5 | 98.80 | HS | 3.00 | 228.66 | 381.10 |
| 12H-2, 0–5 | 103.80 | HS | 3.00 | 308.96 | 514.93 |
| 12H-5, 0–5 | 108.30 | HS | 3.00 | 180.52 | 300.87 |
| 13H-2, 0–5 | 113.30 | HS | 3.00 | 105.75 | 176.25 |
| 13H-5, 0–5 | 117.80 | HS | 3.20 | 122.16 | 190.88 |
| 14H-2, 0–5 | 122.80 | HS | 2.60 | 30.20 | 58.08 |
| 14H-5, 0–5 | 127.30 | HS | 3.20 | 37.48 | 58.56 |
| 15H-2, 0–5 | 132.30 | HS | 3.20 | 13.72 | 21.44 |
| 15H-5, 0–5 | 136.80 | HS | 3.40 | 10.23 | 15.04 |
| 16H-2, 0–5 | 141.80 | HS | 2.80 | 6.78 | 12.11 |
| 16H-5, 0–5 | 146.30 | HS | 3.20 | 8.25 | 12.89 |
| 17H-2, 0–5 | 151.30 | HS | 3.00 | 6.49 | 10.82 |
| 17H-5, 0–5 | 155.80 | HS | 3.60 | 6.63 | 9.21 |
| 18H-2, 0–5 | 160.60 | HS | 3.00 | 3.93 | 6.55 |
| 18H-5, 0–5 | 165.10 | HS | 2.60 | 3.42 | 6.58 |
| 19H-2, 0–5 | 170.10 | HS | 3.00 | 3.45 | 5.75 |
| 19H-5, 0–5 | 174.60 | HS | 3.40 | 3.82 | 5.62 |
| 20H-2, 0–5 | 179.60 | HS | 3.20 | 2.87 | 4.48 |
| 20H-5, 0–5 | 184.10 | HS | 3.40 | 2.66 | 3.91 |
| 21H-2, 0–5 | 189.10 | HS | 3.80 | 3.39 | 4.46 |
| 21H-5, 0–5 | 193.60 | HS | 3.40 | 3.03 | 4.46 |
| 22H-2, 0–5 | 198.60 | HS | 2.80 | 2.78 | 4.96 |
| 22H-5, 0–5 | 203.10 | HS | 2.80 | 2.95 | 5.27 |
| 346-U1423B- | |||||
| 23H-4, 0–5 | 196.60 | HS | 3.00 | 2.69 | 4.48 |
| 24H-4, 0–5 | 206.10 | HS | 3.20 | 2.29 | 3.58 |
| 25H-4, 0–5 | 215.60 | HS | 3.40 | 3.46 | 5.09 |
| 26H-4, 0–5 | 225.10 | HS | 3.20 | 2.63 | 4.11 |
| 27H-4, 0–5 | 234.60 | HS | 3.00 | 2.77 | 4.62 |
| 28H-4, 0–5 | 244.10 | HS | 2.60 | 3.46 | 6.65 |
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