Table T6. Concentration of light hydrocarbon and nonhydrocarbon gases in VAC samples of core gas voids, Holes 1251B, 1251C, and 1251D.
Core, section,
interval (cm)
Depth (mbsf)
C1
(ppmv)
C2 (ppmv)
C3 (ppmv)
i-C4 (ppmv)
H2S (ppmv)
CO2 (ppmv)
O2
(ppmv)
N2
(ppmv)
C1/C2
204-1251B-









1H-4, 68-69 5.18 663,474 3.3

610 15,090 60,042 251,629 198,645
3H-1, 82-83 19.42 90,017



806 20,744 79,400
3H-2, 120-121 21.23 887,044 7.9 3.0




112,426
3H-2, 120-121 21.23 922,877 3.6


44,734 4,086 16,097 257,787
3H-3, 51-52 22.04 939,078 3.4


40,518 1,474 5,746 274,584
3H-4, 102-103 24.03 854,363 2.8


30,037 23,025 88,085 302,966
4H-3, 20-21 31.30 942,068 2.4


32,903 1,741 8,495 399,181
4H-7, 16-17 36.60 751,581



44,141 40,789 159,897
5H-1, 95-96 38.55 971,173 8.7


14,439 170 1,203 111,886
6H-2, 5-6 47.97 940,826
4.5

36,295 1,160 7,280
6H-4, 101-102 51.83 971,082 8.6 7.2

13,931 1,001 1,294 113,444
6H-4, 101-102 51.83 928,978 15.2





60,957
7H-1, 149-150 58.09 959,879 2.2


25,512 82 1,066 442,341
7H-6, 33-34 64.43 967,618 3.9 3.1

16,904 1,521 1,593 250,030
8H-3, 82-83 69.92 973,448 6.9


9,621 677 1,509 140,672
8H-4, 82-83 71.42 956,153 4.8


23,575 2,320 5,648 199,614
8H-6, 93-94 74.41 943,218



43 811 1,380
10H-1, 149-150 86.59 878,158 7.2 8.2




122,136
10H-1, 149-150 86.59 887,884 2.4 4.7 3.6
79,191 6,296 23,172 368,417
10H-4, 87-88 90.47 964,826 3.5


19,575 964 1,456 274,879
11H-2, 32-33 96.42 889,260 16.1


29,308 15,561 57,521 55,406
13H-5, 37-38 111.92 975,681 33.2


7,364 1,965 1,552 29,370
14H-3, 33-34 118.44 909,774 9.8 5.3

14,615 14,253 55,463 93,119
14H-5, 129-130 122.40 826,336 7.1 5.6

16,433

117,211
15H-2, 27-28 126.87 933,370 9.5 7.2

41,174 2,401 12,142 98,249
15H-6, 14-15 132.68 950,428 7.9 5.8

17,900 2 31 120,307
16H-2, 42-43 136.52 796,595 19.9


17,777 36,970 141,455 40,070
16H-6, 16-17 142.17 958,899 11.2 6.9

18,876 1,524 1,280 85,616
17H-5, 100 151.10 957,977 10.8 6.5

21,651 1,138 1,050 88,374
17H-6, 0-1 151.10 956,395 9.5 6.5

22,253 1,643 1,226 100,462
19H-1, 17-18 155.77 954,905 28.4 5.2

26,445 96 1,333 33,576
19H-6, 17-18 162.89 949,159 10.1 6.6

31,665 89 1,165 93,976
20H-2, 1-2 164.69 966,145 14.3 6.2

17,470 60 1,333 67,563
20H-5, 142-143 170.60 960,576 50.7


5,810 4,330 11,484 18,931
22H-1, 93-94 173.63 913,661 13.7 13.1

47,231 2,501 26,262 66,788
22H-5, 120-121 179.88 943,382 10.5 15.1

35,737 1,216 9,815 89,846
23H-4, 122-123 187.92 975,814 7.2 11.2 7.2
12,005 90 1,272 135,718
26X-2, 119-120 206.89 950,476 229





4,158
26X-5, 10-11 210.18 536,925 112





4,796
26X-5, 10-11 210.18 523,622 118


18,324 90,961 355,053 4,456
27X-5, 35-36 219.85 980,448 117


9,849 52 517 8,394
28X-2, 41-42 225.01 801,069 119 4.3

15,094 37,474 142,865 6,732
28X-5, 27-28 229.37 943,040 128 4.1




7,391
29X-3, 17-18 235.97 949,286 113 7.6




8,423
29X-4, 13-14 237.43 969,628 109 5.0 3.1
15,376 1,130 1,019 8,879
30X-4, 130-131 248.20 844,973 105 4.8

22,404 26,534 100,864 8,017
31X-2, 0-1 253.60 959,192 150 8.3 5.7
25,175 2,329 1,534 6,378
31X-4, 0-1 256.51 968,414 124 5.6 3.7
7,167 2,298 1,532 7,810
32X-1, 106-107 262.76 922,295 177 7.4 4.9
24,549 6,933 35,744 5,216
32X-4, 84-85 267.04 934,760 182 6.3 3.8
17,646 5,310 33,176 5,129
34X-2, 102-103 283.52 943,070 214 5.4




4,415
34X-2, 102-103 283.52 947,467 209 6.8

12,320 6,227 17,602 4,536
37X-3, 2-3 303.62 973,461 223 6.7

10,603 84 858 4,362
38X-6, 5-6 317.74 967,284 231 7.6

13,257 1,157 1,147 4,196
39X-3, 140-141 324.30 959,930 209 8.8

7,574 88 847 4,583
41X-2, 140-141 333.50 968,896 207 10.0

7,783 93 1,049 4,690
41X-4, 5-6 335.15 973,624 208 10.4




4,685
41X-4, 5-6 335.15 965,021 200 9.7

5,985 1,337 1,162 4,832
42X-2, 75-76 341.45 964,647 244 12.6

1,586 73 952 3,960
43X-6, 82-83 357.09 946,324 303 25.8 5.1
27,602 1,938 3,826 3,126
44X-6, 55-56 366.45 965,649 202 9.6

10,514 2,654 3,161 4,788
45X-4, 52-53 373.02 957,343 176 7.4

14,978 2,566 6,344 5,436
46X-3, 100-101 381.61 965,019 153 6.1
13 9,516 1,564 2,278 6,301
47X-4, 124-125 393.04 973,548 139 5.7

6,816 1,242 1,209 7,000
49X-2, 102-103 400.42 976,573 138 5.5

10,120 1,664 1,349 7,095
50X-3, 5-6 409.55 973,932 153 6.4

13,600 1,061 1,111 6,360
51X-5, 44-45 422.57 971,211 126 4.8

5,018 61 779 7,733
52X-5, 98-99 432.78 967,073 115


3,435 1,419 1,302 8,393
53X-2, 112-113 438.10 976,937 123


4,715 72 795 7,962
204-1251C-









2X-3, 75-76 11.42 945964 6.7


25674 1420 11260 140,559
2X-4, 33-34 12.50 725956 5.9


3771789 46154 185664 122,215
204-1251D-









16H-1, 135-136 127.25 930,682 7.4 6.0

26,115 1,725 31,136 126,109
17H-1, 120-121 136.60 876,006 10.2 6.1 4.8
26,897 2,418 18,369 85,883
19H-2, 67-68 155.68 888,442 9.7 6.3

24,231 1,235 4,410 91,403
20H-2, 26-27 165.14 959,098 10.7 6.1

21,338 1,552 4,421 89,552
20H-4, 119-120 169.07 900,003 9.7 5.8

16,903 15,785 62,050 92,976
22X-1, 20-21 175.60 569,189 12.3


32,858 75,155 287,021 46,464
22X-2, 123-124 178.10 421,803 9.8


28,072 106,458 382,854 43,085
23X-2, 15-16 180.75 907,069 12.0 27.9 5.4
59,313 6,528 22,411 75,842
23X-4, 4-5 183.61 758,762 10.1 20.4 3.6
39,935 41,418 162,255 74,902
25X-2, 106-107 200.76 896,623 191


28,505 15,542 55,790 4,691
25X-3, 33-34 201.53 850,938 199


29,838 26,389 100,125 4,275
26X-4, 14-15 210.79 968,426 253


14,592 91 3,301 3,830

Note: C1 = methane, C2 = ethane, C3 = propane, i-C4 = isobutane, H2S = hydrogen sulfide, CO2 = carbon dioxide, O2 = oxygen, N2 = nitrogen.