Table T34. Hydrocarbon gas composition in conventionally extracted headspace gas, Holes C0002H, C0002J, C0002K, and C0002L.
|
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-C0002H- | |||||||||
| 1R-1, 137–141 | 1101.9 | 6,731 | 53.0 | 18.3 | 94 | 3,452 | 27.2 | 9.39 | –65.0 |
| 2R-1, 52.5–56.5 | 1111.0 | 9,478 | 26.0 | 4.3 | 312 | 4,018 | 11.0 | 1.84 | –65.1 |
| 338-C0002J- | |||||||||
| 1R-4, 0–4 | 903.2 | 12,262 | 14.5 | 0.3 | 828 | 11,226 | 13.3 | 0.28 | –66.3 |
| 2R-1, 0–4 | 907.0 | 9,104 | 16.1 | 0.3 | 556 | 5,457 | 9.6 | 0.17 | –64.5 |
| 3R-2, 71–74 | 913.5 | 12,533 | 27.7 | 0.9 | 438 | 6,750 | 14.9 | 0.49 | –62.4 |
| 4R-1, 51–55 | 917.5 | 37,579 | 66.6 | 1.5 | 551 | 9,964 | 17.7 | 0.41 | –65.2 |
| 5R-1, 28–32 | 922.3 | 26,987 | 41.2 | 0.1 | 654 | 9,336 | 14.3 | 0.03 | –62.3 |
| 6R-1, 93–97 | 928.0 | 4,534 | 9.1 | ND | 500 | 3,089 | 6.2 | ND | –64.4 |
| 7R-1, 96–100 | 933.0 | 8,234 | 21.0 | 0.4 | 384 | 5,899 | 15.1 | 0.31 | –65.5 |
| 338-C0002K- | |||||||||
| 1H-4, 0–4 | 202.9 | 3,723 | 0.4 | 0.5 | 4,137 | 1,257 | 0.1 | 0.16 | –63.9 |
| 2H-1, 74–78 | 205.3 | 11,861 | 1.0 | ND | 12,042 | 2,530 | 0.2 | ND | –55.4 |
| 3T-4, 136–140 | 209.9 | 4,971 | 0.6 | 1.1 | 3,008 | 1,539 | 0.2 | 0.33 | –52.2 |
| 4T-1, 37–41 | 215.4 | 4,396 | 0.4 | 0.6 | 4,341 | 1,823 | 0.2 | 0.26 | –66.1 |
| 5T-5, 38–42 | 224.1 | 4,035 | 0.6 | 1.6 | 1,830 | 1,322 | 0.2 | 0.53 | –64.4 |
| 6T-2, 74–78 | 231.3 | 2,265 | 0.2 | 0.3 | 4,194 | 660 | 0.1 | 0.09 | –65.7 |
| 7X-6, 0–4 | 242.2 | 3,861 | 0.4 | 1.2 | 2,423 | 1,339 | 0.2 | 0.40 | –63.2 |
| 8X-1, 138–142 | 249.9 | 3,432 | 0.4 | 1.2 | 2,161 | 1,156 | 0.1 | 0.40 | –64.9 |
| 9X-4, 0–4 | 260.4 | 5,866 | 0.7 | 0.8 | 3,993 | 2,106 | 0.2 | 0.28 | –64.0 |
| 10X-1, 33.5–37.5 | 267.9 | 9,999 | 1.4 | 0.4 | 5,548 | 7,152 | 1.0 | 0.31 | –63.0 |
| 11X-1, 28–32 | 277.3 | 4,745 | 0.4 | 1.1 | 3,147 | 1,743 | 0.1 | 0.42 | –61.9 |
| 338-C0002L- | |||||||||
| 1X-3, 126–130 | 280.5 | 2,926 | 0.3 | 1.0 | 2,251 | 855 | 0.1 | 0.29 | –66.8 |
| 3X-1, 103–108 | 297.1 | 4,773 | 0.4 | 0.5 | 5,672 | 2,217 | 0.2 | 0.22 | –63.9 |
| 4X-1, 89–93 | 306.4 | 174 | ND | ND | — | 56 | ND | ND | — |
| 5X-2, 64.5–69.5 | 317.1 | 54 | ND | ND | — | 12 | ND | ND | –44.4 |
| 6X-3, 24.5–29.5 | 327.0 | 11,183 | 1.6 | 3.2 | 2,365 | 2,073 | 0.3 | 0.59 | –30.2 |
| 7X-1, 91.5–95.5 | 334.9 | 4,493 | 0.7 | 2.6 | 1,381 | 1,455 | 0.2 | 0.83 | –62.5 |
| 8X-3, 117.5–121.5 | 346.2 | 6,336 | 0.2 | 3.1 | 1,888 | 1,950 | 0.1 | 0.96 | –56.2 |
| 9X-4, 93.5–97.5 | 356.2 | 2,879 | 0.6 | 0.8 | 2,026 | 1,079 | 0.2 | 0.31 | — |
| 10X-4, 0–4 | 365.1 | 4,735 | 1.2 | 0.6 | 2,590 | 875 | 0.2 | 0.11 | –61.1 |
| 10X-8, 24–27 | 368.9 | 317 | 0.1 | ND | 2,238 | 104 | 0.0 | ND | — |
| 11X-5, 0–4 | 375.6 | 2,588 | 1.8 | 1.9 | 712 | 558 | 0.4 | 0.40 | –58.3 |
| 12X-8, 0–4 | 388.4 | 3,075 | 1.9 | ND | 1,607 | 1,416 | 0.9 | ND | — |
| 13X-2, 0–4 | 392.1 | 4,812 | 3.4 | 0.3 | 1,311 | 2,445 | 1.7 | 0.16 | –55.6 |
| 14X-4, 0–4 | 403.5 | 3,553 | 10.3 | 0.5 | 329 | 889 | 2.6 | 0.12 | — |
| 15X-2, 89–93 | 411.8 | 4,650 | 11.6 | ND | 402 | 1,582 | 3.9 | ND | –61.4 |
| 16X-2, 135.5–139.5 | 421.9 | 11,157 | 12.4 | 0.4 | 873 | 2,530 | 2.8 | 0.09 | –59.5 |
| 17X-5, 0–4 | 432.3 | 2,966 | 5.5 | 0.3 | 509 | 942 | 1.7 | 0.10 | –54.5 |
| 18X-2, 85–89 | 440.3 | 5,278 | 10.0 | 0.5 | 505 | 1,495 | 2.8 | 0.14 | — |
| 19X-2, 104–108 | 450.3 | 5,175 | 8.7 | 0.4 | 569 | 692 | 1.2 | 0.05 | –54.1 |
| 20X-1, 100–104 | 458.5 | 12,550 | 7.6 | 0.3 | 1,587 | 4,657 | 2.8 | 0.10 | –57.5 |
| 21X-3, 80.5–84.5 | 470.4 | 7,577 | 8.0 | 0.3 | 908 | 2,603 | 2.8 | 0.11 | — |
| 22X-1, 62–66 | 477.1 | 4,146 | 7.3 | ND | 565 | 831 | 1.5 | ND | — |
| 24X-6, 0–4 | 501.0 | 4,720 | 4.8 | ND | 983 | 2,256 | 2.3 | ND | –42.6 |
ND = not detected. — = not enough methane to measure δ13C-CH4. VPDB = Vienna Peedee belemnite.
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