Previous   |    Close   |    Next

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.

Previous   |    Close   |    Next   |    Top of page