Table T12. Hydrocarbon gas composition in conventionally extracted headspace gas, Hole C0022B.
|
Core, section,
interval (cm) |
Depth
(mbsf) |
Headspace gas (ppmv) |
C1/(C2 + C3)
|
Headspace gas (μM) |
δ13C-CH4 (‰ VPDB)
|
||||
|---|---|---|---|---|---|---|---|---|---|
|
Methane
|
Ethane
|
Propane
|
Methane
|
Ethane
|
Propane
|
||||
| 338-C0022B- | |||||||||
| 1H-1, 120.5–124.5 | 1.2 | 6 | ND | ND | — | 2 | ND | ND | — |
| 2H-1, 95–99 | 20.5 | 9,489 | 1.7 | 0.4 | 4,465 | 2,843 | 0.5 | 0.1 | — |
| 3H-1, 121–125 | 30.2 | 10,952 | 1.6 | 0.3 | 5,777 | 2,727 | 0.4 | 0.1 | –76.1 |
| 4H-1, 91.5–95.5 | 39.4 | 6,223 | 1.2 | ND | 5,243 | 2,266 | 0.4 | ND | –68.5 |
| 5H-1, 124–128 | 49.2 | 7,996 | 1.3 | ND | 6,385 | 2,185 | 0.3 | ND | –47.8 |
| 6H-1, 102.5–106.5 | 58.5 | 4,525 | 1.0 | ND | 4,747 | 1,311 | 0.3 | ND | — |
| 7H-8, 0–4 | 74.2 | 9,229 | 1.8 | ND | 5,219 | 2,354 | 0.5 | ND | — |
| 8H-2, 59–63 | 78.0 | 17,178 | 2.6 | ND | 6,646 | 3,236 | 0.5 | ND | –69.5 |
| 9T-1, 28–32 | 84.8 | 9,658 | 2.1 | 0.3 | 4,120 | 2,487 | 0.5 | 0.1 | –68.6 |
| 10T-1, 80–84 | 90.3 | 12,192 | 2.2 | 0.3 | 4,811 | 2,254 | 0.4 | 0.1 | –63.9 |
| 11T-1, 0–4 | 94.5 | 5,569 | 1.0 | ND | 5,561 | 2,177 | 0.4 | ND | — |
| 12X-1, 116.4–120.4 | 100.7 | 5,226 | 1.2 | ND | 4,324 | 956 | 0.2 | ND | –64.2 |
| 13X-1, 26–30 | 104.8 | 5,997 | 1.5 | ND | 3,962 | 1,250 | 0.3 | ND | –64.4 |
| 14X-4, 56–60 | 114.1 | 5,927 | 2.2 | ND | 2,651 | 1,447 | 0.5 | ND | –59.5 |
| 15X-3, 106–110 | 118.5 | 3,081 | 1.2 | ND | 2,524 | 838 | 0.3 | ND | –67.8 |
| 16X-3, 72–76 | 127.4 | 10,486 | 2.7 | ND | 3,863 | 2,601 | 0.7 | ND | — |
| 17X-3, 0–4 | 135.0 | 12,967 | 4.0 | ND | 3,240 | 2,231 | 0.7 | ND | –63.0 |
| 18X-3, 75–79 | 145.5 | 11,604 | 6.4 | 0.3 | 1,728 | 2,924 | 1.6 | 0.1 | –61.2 |
| 19X-3, 0–4 | 153.6 | 11,195 | 6.9 | ND | 1,623 | 3,819 | 2.4 | ND | –71.3 |
| 20X-3, 122–126 | 193.5 | 5,810 | 9.0 | ND | 647 | 1,112 | 1.7 | ND | –61.1 |
| 21X-7, 0–4 | 204.5 | 4,429 | 5.6 | ND | 786 | 1,388 | 1.8 | ND | –61.1 |
| 22X-1, 118–122 | 210.7 | 6,274 | 8.5 | ND | 736 | 1,451 | 2.0 | ND | –50.2 |
| 23X-3, 44–48 | 221.2 | 10,480 | 7.3 | ND | 1,444 | 2,234 | 1.5 | ND | — |
| 24X-2, 77–81 | 268.7 | 9,972 | 7.8 | ND | 1,279 | 2,849 | 2.2 | ND | –62.9 |
| 25X-CC, 0–4 | 276.9 | 7,587 | 5.3 | ND | 1,422 | 2,585 | 1.8 | ND | — |
| 26X-6, 0–4 | 291.1 | 2,802 | 3.8 | ND | 734 | 945 | 1.3 | ND | — |
| 27X-3, 99.5–103.5 | 294.3 | 11,282 | 9.5 | ND | 1,194 | 2,645 | 2.2 | ND | –67.2 |
| 28X-2, 68–72 | 297.4 | 7,078 | 7.1 | ND | 994 | 2,292 | 2.3 | ND | — |
| 29X-3, 0–4 | 301.8 | 6,028 | 4.8 | ND | 1,264 | 1,855 | 1.5 | ND | –55.8 |
| 30X-2, 52–56 | 307.2 | 7,459 | 5.5 | ND | 1,348 | 2,107 | 1.6 | ND | –70.7 |
| 31X-1, 81–85 | 315.8 | 14,447 | 9.8 | ND | 1,467 | 3,281 | 2.2 | ND | –62.1 |
| 32X-CC, 0–4 | 325.9 | 5,356 | 4.2 | ND | 1,271 | 1,074 | 0.8 | ND | — |
| 33X-6, 109.5–113.5 | 341.6 | 17,582 | 6.6 | ND | 2,651 | 5,483 | 2.1 | ND | — |
| 34X-4, 0–4 | 345.8 | 5,887 | 4.0 | ND | 1,490 | 2,099 | 1.4 | ND | — |
| 35X-6, 0–4 | 358.3 | 10,361 | 4.2 | ND | 2,461 | 5,457 | 2.2 | ND | –55.0 |
| 36X-4, 0–4 | 364.7 | 7,221 | 6.7 | ND | 1,074 | 1,561 | 1.5 | ND | –68.5 |
| 37X-3, 0–4 | 373.3 | 12,507 | 7.0 | ND | 1,777 | 2,567 | 1.4 | ND | –49.4 |
| 38X-4, 0–4 | 384.9 | 7,649 | 4.7 | ND | 1,636 | 2,122 | 1.3 | ND | –56.5 |
| 39X-3, 0–4 | 392.8 | 7,557 | 4.0 | ND | 1,911 | 2,294 | 1.2 | ND | –67.5 |
| 40X-2, 126–130 | 403.2 | 6,762 | 4.5 | ND | 1,487 | 2,022 | 1.4 | ND | — |
| 41X-3, 0–4 | 412.2 | 12,230 | 4.7 | ND | 2,589 | 3,902 | 1.5 | ND | — |
ND = not detected. — = not enough methane to measure δ13C-CH4. VPDB = Vienna Peedee belemnite.
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