Table T11. Hydrocarbon gas composition in the void gas, Hole C0021B.
|
Core, section, interval (cm) |
Depth (mbsf) |
Headspace gas (ppmv) | C1/(C2 + C3) |
δ13C-CH4 (‰ VPDB) |
||
|---|---|---|---|---|---|---|
| Methane | Ethane | Propane | ||||
| 338-C0021B- | ||||||
| 1H-1, 0 | 0.0 | 616 | 0.2 | ND | 4,088 | — |
| 2H-7, 10 | 84.7 | 232,208 | 75.8 | ND | 3,065 | –76.0 |
| 3H-5, 36.5 | 92.3 | 218,181 | 22.7 | 0.7 | 9,334 | –73.1 |
| 4H-3, 22.5 | 100.8 | 217,486 | 23.6 | 0.7 | 8,939 | –73.7 |
| 5H-7, 71.5 | 116.4 | 202,735 | 83.5 | ND | 2,429 | –74.5 |
| 6H-5, 48 | 121.7 | 230,268 | 79.0 | ND | 2,914 | –74.9 |
| 7H-5, 85 | 130.9 | 206,510 | 32.8 | 0.2 | 6,268 | –74.7 |
| 8H-8, 94 | 146.3 | 328,881 | 66.5 | ND | 4,947 | –72.9 |
| 9H-1, 41 | 146.9 | 254,492 | 81.0 | 0.6 | 3,119 | –74.3 |
| 10H-9, 109 | 163.4 | 127,616 | 39.7 | 0.2 | 3,197 | –74.4 |
| 13T-6, 16 | 180.4 | 193,182 | 114.7 | ND | 1,685 | –74.4 |
| 14T-3, 102 | 187.7 | 216,877 | 204.9 | 0.1 | 1,058 | –73.7 |
ND = not detected. — = not enough methane to measure δ13C-CH4. VPDB = Vienna Peedee belemnite.
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