Table T2. Composition of gas aliquots released from the PCS at Site 1230.
Hole
Core
Gas split
Gas concentrations
Number*
Volume
(mL)
C1†
(ppm)
C2†
(ppm)
C1‡
(ppm)
C2‡
(ppm)
N2‡
(ppm)
O2‡
(ppm)
N2/O2
(ppm)
CO2‡
(ppm)
1230A 7P G10 290 894,599 ND 888,263 13 53,995 10,343 5 ND
1230A 7P G11 110 926,475 ND 918,425 16 21,901 922 24 ND
1230A 7P G13 50 543,753 ND 497,607 ND 17,563 2,411 7 ND
1230A 16P G3 185 911,330 ND 904,526 32 4,270 898 5 ND
1230A 16P G4 660 953,058 ND 949,518 33 714 319 2 ND
1230A 16P G5 690 953,058 ND 949,519 33 714 319 2 ND
1230A 16P G6 550 942,077 ND 939,084 19 1,072 347 3 ND
1230A 16P G7 410 914,609 ND 909,365 16 14,742 2,147 7 ND
1230A 16P G8 260 880,641 ND 874,291 18 43,986 7,308 6 ND
1230A 16P G9 80 881,346 ND 866,884 18 44,237 7,584 6 ND
1230A 16P G10 200 826,858 ND 822,154 21 102,132 16,454 6 ND
1230A 20P G1 180 744,244 ND 734,219 58 167,070 37,715 4 ND
1230A 20P G2 630 938,422 ND ND 80 674 293 2 9,838
1230A 20P G3 960 947,339 ND 931,693 80 591 184 3 6,030
1230A 20P G4 930 947,167 ND ND 79 592 137 4 4,510
1230A 20P G5 670 929,254 ND 912,886 77 1,405 987 1 6,416
1230A 20P G6 710 939,716 ND 922,880 72 1,327 127 10 8,964
1230A 20P G7 510 934,807 ND 917,411 68 783 209 4 16,054
1230A 20P G8 660 921,354 ND 904,865 70 1,421 60 24 34,657
1230A 20P G9 170 886,660 ND 872,607 71 32,926 324 102 47,700
1230A 20P G10 70 881,241 ND 866,141 73 32,922 341 97 54,799
1230A 20P G11 220 869,129 ND 853,511 76 41,655 1,909 22 55,531
1230A 20P G12 80 846,188 ND ND 79 15,567 409 38 75,157
1230A 25P G1 50 107,475 ND 144,895 11 407,485 100,386 4 ND
1230A 25P G2 40 340,687 54 ND 55 171,138 36,247 5 2,938
1230A 25P G3 20 505,060 51 668,083 67 24,436 635 38 1,712
1230A 25P G4 40 926,842 ND 919,879 570 12,431 ND
35,929
1230A 36P G1 30 6,452 ND ND ND 751,891 190,060 4 ND
1230A 36P G2 460 920,916 ND 910,018 580 22,712 3,574 6 ND
1230A 36P G3 600 936,947 ND 926,119 578 1,245 530 2 ND
1230A 36P G4 20 927,083 ND 919,880 570 4,360 228 19 ND
1230A 39P G1 130 928,439 ND 917,459 474 19,350 4268 5 ND
1230A 39P G2 500 950,774 ND 940,066 479 966 ,494 2 ND
1230A 39P G3 670 943,460 ND 931,838 477 960 346 3 ND
1230B 4P G0 150 2,984 ND ND ND 676 ND
ND
1230B 4P G1 40 5,343 ND ND ND 76,879 15,343 5 1,017
1230B 4P G2 220 133,008 ND 191,941 ND 345,907 56,643 6 2,357
1230B 4P G3 135 280,815 ND 259,780 ND 336,831 52,228 6 4,305
1230B 10P G2 195 885,772 ND 878,731 8 47,244 2,243 21 ND
1230B 10P G3 535 895,825 ND 888,696 9 42,794 1,603 27 ND
1230B 10P G4 190 847,186 ND 841,302 11 79,455 3,200 25 ND
1230B 14P G1 100 901,275 ND 892,595 38 44,300 7,239 6 ND
1230B 14P G2 640 945,934 ND 936,498 27 ND ND
ND
1230B 14P G3 600 936,232 ND 926,661 17 ND ND
ND
1230B 14P G4 225 902,128 ND 897,803 18 27,656 2,501 11 ND
1230B 14P G5 150 909,206 ND 904,877 22 ND ND
ND
1230E 5P G1 70 14,529 ND ND ND 190,432 50,010 4 1,299
1230E 5P G2 20 8,613 ND ND ND 536,883 141,130 4 ND
1230E 5P G3 100 563,209 ND 557,719 9 293,682 64,590 5 ND
1230E 5P G4 20 907,606 ND 901,368 19 39,198 2,232 18 ND

Notes: * = gas split shown in the "Appendix". Gas concentrations were determined using different gas chromatography detectors: † = FID (flame ionization detector); ‡ = TCD (thermal conductivity detector). ND = not detected by automatic integration; this does not mean it is not present, especially for CO2.