Table T9. Concentrations of light hydrocarbon and nonhydrocarbon gases from dissociated gas hydrate, Holes U1328C, U1328D, and U1328E.
|
Core, section, interval (cm) |
Depth (mbsf) |
C1/C2 |
i-C4/ n-C4 |
Hydrocarbons (ppvm) | Volatiles (ppmv) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C1 | C2 | C3 | i-C4 | n-C4 | i-C5 | n-C5 | H2S | CO2 | O2 | N2 | ||||
| 311-U1328C- | ||||||||||||||
| 2H-1, 5–6 | 4.60 | 930 | 3.8 | 803,565 | 864 | 7.3 | 1.5 | 0.4 | 0.4 | 0 | 0 | 680 | 8,780 | 30,976 |
| 2H-CC, 0–5 | 6.10 | 953 | 0 | 846,633 | 888 | 7.4 | 0.2 | 0 | 0 | 0 | 18,325 | 1,292 | 5,835 | 22,218 |
| 5H-CC, 5–10 | 18.30 | 765 | 1.0 | 810,363 | 1,059 | 0 | 1.4 | 1.4 | 0.5 | 1.3 | 0 | 941 | 53,449 | 200,560 |
| 6X-2, 23–24 | 19.80 | 765 | 1.5 | 862,710 | 1,127 | 0 | 1.5 | 1.0 | 2.3 | 0.9 | 0 | 2,445 | 27,707 | 100,625 |
| 6X-2, 135–136 | 20.90 | 635 | 1.1 | 881,605 | 1,389 | 6.7 | 1.2 | 1.1 | 1.7 | 1.0 | 0 | 1,063 | 29,289 | 103,691 |
| 6X-2, 150–151 | 21.10 | 684 | 1.3 | 868,093 | 1,269 | 0 | 1.8 | 1.4 | 2.2 | 1.1 | 0 | 1,167 | 32,722 | 118,142 |
| 6X-CC, 0–1 | 21.10 | 642 | 1.3 | 827,250 | 1,289 | 0 | 1.5 | 1.2 | 3.1 | 1.1 | 0 | 883 | 32,572 | 118,627 |
| 311-U1328D- | ||||||||||||||
| 1X-CC, 0–1 | 8.10 | 536 | 5.5 | 762,983 | 1,423 | 0 | 1.1 | 0.2 | 0.3 | 0 | 4,674 | 1,014 | 21,090 | 81,802 |
| 2X-CC, 0–1 | 6.30 | 630 | 5.0 | 494,148 | 784 | 0 | 1.0 | 0.2 | 0.6 | 0 | 10,339 | 840 | 3,814 | 18,824 |
| 311-U1328E- | ||||||||||||||
| 2X-2, 20–40 | 8.10 | 1,544 | 3.8 | 751,815 | 487 | 0 | 1.5 | 0.4 | 0.6 | 0 | 0 | 584 | 48,340 | 185,613 |
| 2X-2, 60–70 | 8.50 | 1,584 | 1.7 | 773,368 | 488 | 0 | 0.5 | 0.3 | 0.8 | 3.1 | 348 | 661 | 43,045 | 164,752 |
| 2X-CC, 0–10 | 8.80 | 630 | 2.7 | 494,148 | 784 | 0 | 0.8 | 0.3 | 0.7 | 0.6 | 0 | 0 | 5,929 | 19,167 |
| 9X-2, 48–50 | 38.30 | 456 | 0 | 907,908 | 1,989 | 0 | 0.4 | 0 | 0 | 0 | 0 | 781 | 11,482 | 41,377 |
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