Table T7. Composition of gas samples from PCS experiments, Hole 1247B.
Sample
Volume (mL)
C1
(ppm)
C2
(ppm)
C3
(ppm)
i-C4 (ppm)
n-C4 (ppm)
i-C5 (ppm)
n-C5 (ppm)
O2
(ppm)
N2
(ppm)
CO2 (ppm)
C1/C2
204-1247B-4P (22.6 mbsf)









G1 195 460,317 7.6 4.9



51,941 471,251 5,255 60,728
204-1247B-16P (123.3 mbsf)









G1 90 496,730 128.5 9.9
5.7 2.2 17.9 49,524 333,285 159 2,396
G2 245 891,178 345.0 24.6 7.3


8,230 91,030 358
G3 240 915,366 381.6 24.9



1,408 56,990 288
G4 450 920,808 367.8 25.5



1,511 58,910 189
G5 420 927,056 389.4 26.3



2,653 46,396 176
G6 315 932,118 393.4 30.0



984 42,328 165
G7 510 926,830 378.3 27.2



1,077 4,999 170
G8 495 910,966 341.8 27.2



1,392 65,902 187
G9 480 927,421 364.7 28.4



1,148 47,641 220
G10 330 916,396 351.3 30.3



3,699 56,933 267
G11 345 923,908 358.3 28.9



2,316 50,860 303
G12 465 935,760 372.1 30.5



972 37,564 305
G13 550 935,567 376.1 30.8



7,457 60,227 421
G14 490 937,119 418.2 33.6



993 35,552 745
G15 250 933,606 448.1 33.8



2,880 40,652 1,211
G16 120 933,260 438.9 40.6



2,228 36,009 1,423
G17 140 936,946 454.2 39.2



2,154 33,852 1,572
G18 90 931,460 468.3 42.7



1,895 35,805 1,370

Notes: C1 = methane, C2 = ethane, C3 = propane, i-C4 = isobutane, n-C4 = normal butane, i-C5 = isopentane, n-C5 = normal pentane, O2 = oxygen, N2 = nitrogen, CO2 = carbon dioxide. C1/C2 ratio reported corresponds to the integrated value for the entire pressure core.