Table 5. Composition of headspace gases (ppm) from Site 1005. Site H Core T Sec Depth C1 C2 C3 i C4 n C4 i C5 n C5 i C6 n C6 C1/C2 C1/C2+ H2S mbsf ppm-v ppm-v 1005 A 1 H 2 1.50 2 1005 A 2 H 6 10.00 2 1005 A 3 H 2 13.50 4 1005 A 4 H 6 23.50 2 1005 A 5 H 6 33.00 2 1005 A 6 H 6 42.50 13 0.2 65 65 1005 A 7 H 5 50.50 60 0.6 100 100 1005 A 8 H 5 58.00 320 2 0.5 160 128 1005 A 9 H 5 66.67 462 2 0.7 0.3 0.5 231 132 917 1005 A 10 X 2 69.00 748 4 1.3 0.8 0.6 2 187 86 2233 1005 A 11 X 2 73.50 1080 3 0.8 0.5 0.4 0.8 360 196 1005 A 12 X 5 87.60 2403 4 1 0.5 0.4 0.8 601 359 1205 1005 A 13 X 3 94.20 2058 4 0.8 0.3 0.4 0.6 515 337 9443 1005 A 14 X CC 100.40 637 2 0.6 319 245 43 1005 A 15 X 1 109.90 341 2 171 171 1005 A 16 X 3 122.40 1335 5 2 1 2 4 0.5 267 92 46 1005 A 18 X 1 138.84 9800 5 6 3 2 4 1 0.3 0.3 1960 454 61 1005 A 19 X 2 148.80 11085 5 6 3 2 3 1 0.2 0.2 2217 543 53 1005 A 20 X 5 162.60 15846 8 12 6 5 8 1 0.4 0.3 1981 389 59 1005 A 22 X 3 178.20 9219 1 1 0.3 0.5 1 9219 2426 3247 1005 A 24 X 1 194.00 4607 1 0.5 4607 3071 1005 A 26 X 1 212.30 4324 1 0.4 0.4 0.3 0.7 4324 1544 7732 1005 A 29 X CC 239.80 8736 2 1 2 0.5 4368 1588 957 1005 A 30 X 4 253.80 10665 2 1 0.4 0.3 0.6 5333 2480 55 1005 A 31 X 4 263.20 14627 3 1 1 0.4 1 0.4 4876 2151 9866 1005 A 34 X 2 281.80 11627 5 1 0.6 0.4 0.6 2325 1530 26590 1005 A 35 X 3 289.60 8422 4 1 0.5 0.4 0.7 2106 1276 19124 1005 A 36 X 3 299.10 11865 8 3 0.9 0.7 1 1483 872 34234 1005 A 37 X 1 305.70 6549 5 1 0.6 0.4 0.6 1310 862 3933 1005 A 38 X 1 315.40 4022 4 1 0.7 0.5 0.6 1006 591 14608 1005 A 39 X CC 324.20 425 0.9 472 472 1005 A 40 X CC 333.70 921 4 1 0.5 0.8 0.8 0.3 230 124 1005 A 41 X CC 343.10 999 4 0.3 250 232 1005 A 42 X 2 353.40 1432 7 2 0.6 0.6 0.4 0.3 205 131 240 1005 A 43 X 1 360.90 625 4 2 0.8 0.9 0.8 0.3 156 71 1005 A 44 X 1 370.40 1444 10 2 0.8 0.8 0.5 144 102 1005 A 47 X 1 398.20 625 4 2 0.8 0.9 0.8 156 74 1005 A 51 X CC 435.50 54 1 1 54 27 1005 A 52 X CC 444.50 238 4 2 1 60 34 42 1005 A 53 X CC 453.80 60 1 0.6 0.3 0.4 0.4 60 22 1005 C 1 R 2 388.10 305 3 2 2 1 0.9 102 34 1005 C 2 R 2 397.40 664 9 6 3 2 0.5 0.2 74 32 1005 C 3 R 2 406.70 887 7 2 0.6 0.6 0.4 0.1 127 83 1005 C 4 R 1 415.95 537 4 2 0.4 0.5 0.4 0.1 134 73 1005 C 5 R 1 424.00 780 7 3 1 1 1 111 60 1005 C 6 R 2 434.90 636 5 2 0.5 1 0.5 0.2 127 69 1005 C 7 R 2 443.90 141 1.5 0.6 0.2 0.3 0.2 94 50 1005 C 8 R 1 452.69 97 1.4 0.5 0.1 0.2 0.2 69 40 1005 C 9 R 1 460.70 331 3 2 1 1 1 0.2 110 40 1005 C 10 R 2 471.50 508 4.5 2 0.5 1 1 0.2 113 55 1005 C 11 R 1 479.30 7 1005 C 12 R 1 488.60 100 1 1 0.4 0.3 100 37 1005 C 13 R 1 497.60 132 1 1 0.2 0.3 0.2 132 49 1005 C 14 R 1 506.90 55 1 1 1 0.4 55 16 1005 C 15 R 1 517.75 233 4 2 1 1 58 29 1005 C 16 R 1 525.30 154 2 1 0.4 0.5 0.3 77 37 1005 C 17 R 1 534.30 123 1 1 1 1 0.5 0.2 123 26 1005 C 18 R 1 543.80 170 2 1 0.3 0.5 0.3 85 41 1005 C 19 R 1 554.13 162 3 9 1 1 0.8 0.3 0.2 54 11 1005 C 20 R 3 565.12 51 0.8 0.4 0.4 0.4 0.3 64 22 1005 C 21 R 3 574.61 365 7 3 2 1 1 0.5 0.2 52 25 1005 C 22 R 1 582.15 310 8 6 1 3 2 1 0.5 39 14 1005 C 23 R 2 592.60 365 7 3 0.8 2 0.8 0.4 0.3 52 26 1005 C 24 R 1 599.00 56 1 1 0.3 0.4 0.3 0.3 56 17 1005 C 25 R 3 611.00 80 1 1 0.3 0.5 0.3 0.3 80 24 1005 C 26 R 2 618.94 169 5 3 1 2 2 1 34 12 1005 C 27 R 1 627.00 29 1 2 29 10 1005 C 28 R 2 637.37 109 3 1 0.3 1 1 1 36 15 1005 C 29 R 2 646.77 281 12 8 4 6 7 3 1 1 23 7 1005 C 30 R 1 654.40 65 2 1 1 1 1 1 33 9 1005 C 31 R 4 667.68 63 2 2 1 1 2 1 32 7 1005 C 32 R 3 675.40 129 9 10 7 11 19 7 3 4 14 2 1005 C 33 R 3 684.82 103 5 4 2 3 4 2 0.4 0.7 21 5 1005 C 34 R 3 693.92 203 10 9 7 10 15 6 1 3 20 3 VACUTAINER 1005 A 30 X 2 251.81 103805 16 15 2 2 2 0.2 6488 2790 58416 Notes: Below 66.7 mbsf gas analysis is performed using the NGA. C1 to C6 headings represent the "alkanes: methane, ethane, propane, butane, pentane, and hexane. Iso and normal configurations of" "butane, pentane, and hexane are designated with i and n prefixes respectively. C1/C2 = methane/ethane" "ratio, C1/C2+ = ratio methane/(C2 to C6). H2S = hydrogen sulfide."