Table T13. Hydrocarbon gas composition in additionally 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 | 5 | ND | ND | — | 1 | ND | ND | — |
| 2H-1, 95–99 | 20.5 | 13,616 | 1.7 | ND | 8,062 | 2,579 | 0.3 | ND | –83.5 |
| 3H-1, 121–125 | 30.2 | 10,252 | 1.3 | ND | 8,177 | 1,895 | 0.2 | ND | –77.7 |
| 4H-1, 91.5–95.5 | 39.4 | 10,507 | 1.9 | 0.3 | 4,841 | 2,990 | 0.5 | 0.1 | –76.8 |
| 5H-1, 124–128 | 49.2 | 15,028 | 2.4 | 0.3 | 5,501 | 1,923 | 0.3 | ND | –72.4 |
| 6H-1, 102.5–106.5 | 58.5 | 5,627 | 1.0 | ND | 5,713 | 1,201 | 0.2 | ND | –73.3 |
| 7H-8, 0–4 | 74.2 | 9,495 | 1.7 | ND | 5,618 | 1,266 | 0.2 | ND | –71.4 |
| 8H-2, 59–63 | 78.0 | 13,011 | 1.9 | ND | 6,952 | 1,388 | 0.2 | ND | –66.9 |
| 9T-1, 28–32 | 84.8 | 9,271 | 1.7 | ND | 5,311 | 1,063 | 0.2 | ND | –70.1 |
| 10T-1, 80–84 | 90.3 | 8,373 | 1.6 | ND | 5,242 | 939 | 0.2 | ND | –70.0 |
| 11T-1, 0–4 | 94.5 | 6,444 | 0.9 | ND | 7,249 | 2,941 | 0.4 | ND | –71.2 |
| 12X-1, 116.4–120.4 | 100.7 | 5,267 | 0.9 | ND | 5,689 | 839 | 0.1 | ND | –70.6 |
| 13X-1, 26–30 | 104.8 | 6,897 | 1.2 | ND | 5,911 | 1,193 | 0.2 | ND | –71.6 |
| 14X-4, 56–60 | 114.1 | 10,121 | 2.8 | ND | 3,656 | 1,570 | 0.4 | ND | –71.4 |
| 15X-3, 106–110 | 118.5 | 3,546 | 0.9 | ND | 3,991 | 602 | 0.2 | ND | –70.0 |
| 16X-3, 72–76 | 127.4 | 6,454 | 2.0 | ND | 3,270 | 1,093 | 0.3 | ND | –71.5 |
| 17X-3, 0–4 | 135.0 | 9,727 | 3.0 | ND | 3,235 | 1,360 | 0.4 | ND | –71.1 |
| 18X-3, 75–79 | 145.5 | 5,246 | 3.6 | ND | 1,463 | 1,043 | 0.7 | ND | –70.2 |
| 19X-3, 0–4 | 153.6 | 6,902 | 4.7 | ND | 1,462 | 1,607 | 1.1 | ND | –71.8 |
| 20X-3, 122–126 | 193.5 | 9,272 | 6.7 | ND | 1,394 | 1,490 | 1.1 | ND | –69.9 |
| 21X-7, 0–4 | 204.5 | 3,937 | 4.0 | ND | 991 | 499 | 0.5 | ND | –72.3 |
| 22X-1, 118–122 | 210.7 | 4,284 | 4.6 | ND | 927 | 948 | 1.0 | ND | –69.8 |
| 23X-3, 44–48 | 221.2 | 14,563 | 10.3 | ND | 1,415 | 2,211 | 1.6 | ND | –64.8 |
| 24X-2, 77–81 | 268.7 | 4,218 | 4.4 | ND | 951 | 905 | 1.0 | ND | –69.6 |
| 25X-CC, 0–4 | 276.9 | 5,719 | 4.5 | ND | 1,279 | 1,959 | 1.5 | ND | –71.1 |
| 26X-6, 0–4 | 291.1 | 7,119 | 5.1 | ND | 1,384 | 1,338 | 1.0 | ND | –69.2 |
| 27X-3, 99.5–103.5 | 294.3 | 13,787 | 8.0 | ND | 1,733 | 2,167 | 1.3 | ND | –67.9 |
| 28X-2, 68–72 | 297.4 | 10,208 | 4.4 | ND | 2,308 | 2,283 | 1.0 | ND | –70.0 |
| 29X-3, 0–4 | 301.8 | 5,748 | 2.9 | ND | 2,014 | 1,486 | 0.7 | ND | –69.9 |
| 30X-2, 52–56 | 307.2 | 4,706 | 3.6 | ND | 1,317 | 781 | 0.6 | ND | — |
| 31X-1, 81–85 | 315.8 | 4,176 | 4.6 | ND | 918 | 696 | 0.8 | ND | –72.2 |
| 32X-CC, 0–4 | 325.9 | 7,456 | 5.0 | ND | 1,487 | 806 | 0.5 | ND | –71.9 |
| 33X-6, 109.5–113.5 | 341.6 | 8,662 | 4.6 | ND | 1,894 | 2,058 | 1.1 | ND | –69.1 |
| 34X-4, 0–4 | 345.8 | 6,348 | 3.1 | ND | 2,033 | 1,370 | 0.7 | ND | –70.1 |
| 35X-6, 0–4 | 358.3 | 13,064 | 4.5 | ND | 2,892 | 2,158 | 0.7 | ND | –69.9 |
| 36X-4, 0–4 | 364.7 | 9,979 | 5.2 | ND | 1,913 | 1,345 | 0.7 | ND | –68.2 |
| 37X-3, 0–4 | 373.3 | 9,367 | 3.8 | ND | 2,484 | 1,650 | 0.7 | ND | –68.9 |
| 38X-4, 0–4 | 384.9 | 19,396 | 6.8 | ND | 2,846 | 3,238 | 1.1 | ND | –67.9 |
| 39X-3, 0–4 | 392.8 | 17,855 | 6.7 | ND | 2,675 | 3,552 | 1.3 | ND | –69.3 |
| 40X-2, 126–130 | 403.2 | 10,268 | 5.1 | ND | 2,027 | 2,451 | 1.2 | ND | –68.2 |
| 41X-3, 0–4 | 412.2 | 7,229 | 2.1 | ND | 3,398 | 2,512 | 0.7 | ND | –68.8 |
ND = not detected. — = not enough methane to measure δ13C-CH4. VPDB = Vienna Peedee belemnite.
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