"Table 13. Composition of gas released from gas-collection chambers after various degassing periods, Hole 994D." "Core, section" Depth (mbsf) Time elapsed O2 (ppmv) N2 (ppmv) C1 (ppmv) CO2 (ppmv) C2 (ppmv) C3 (ppmv) i-C4 (ppmv) n-C4 (ppmv) i-C5 (ppmv) n-C5 (ppmv) C1/C2 C1/C2+ Hours Min. Sec. 164-994D- 1H-1 100 0 14 25 137000 556000 135600 143300 19 4 1 0.2 2.3 0.5 7100 5100 1H-1 100 0 14 50 145000 590000 162200 7200 33 5 1.3 0.5 0.7 0.8 4900 3900 1H-1 100 4 2 15 110000 455000 256500 8100 13 6 1.7 0.4 1.6 0.6 19700 11000 1H-1 100 4 2 30 109000 449000 282200 8700 16 6 1.7 0.6 0.5 17600 11400 1H-2 101.5 0 17 12 118000 479000 269700 14200 32 7 1.8 0.4 0.8 8400 6420 1H-2 101.5 0 17 45 113000 462000 273200 14800 40 7 2.4 0.5 0.7 0.5 6830 5350 1H-3 103 0 4 0 96000 392000 387500 23700 26 7 2.2 14900 11000 1H-3 103 0 4 10 89000 36000 401900 24700 28 10 2.5 0.5 0.6 0.3 14500 9780 1H-3 103 0 39 0 63000 259000 607500 36200 36 15 3.9 1.1 0.9 16900 10700 1H-3 103 0 42 0 58000 239000 500000 26900 20 9 2.7 0.6 0.8 0.3 25000 15000 1H-4 104.5 0 1 50 178000 710000 13 700 1H-4 104.5 0 1 55 92000 369000 454100 20500 21 11 2.5 0.6 0.6 0.6 21600 12500 1H-4 104.5 0 21 50 57000 231000 619500 31900 40 17 3.7 0.8 1.1 0.6 15500 9800 1H-4 104.5 0 22 10 59000 241000 627400 34200 31 15 3.5 0.8 0.9 20200 12300 1H-5 106 0 9 45 105000 426000 343200 17900 18 7 2.2 0.5 19100 12500 1H-5 106 0 9 55 106000 431000 345900 18300 15 7 1.9 0.3 0.5 0.4 23100 13800 1H-5 106 0 27 15 90000 371000 382600 19000 13 9 2.7 0.8 0.3 29400 14900 1H-5 106 0 27 45 89000 365000 374300 21500 12 8 2.8 0.4 0.6 0.3 31200 15500 1H-5 106 1 15 30 59000 248000 573000 27800 28 13 3.7 0.5 1 0.3 20500 12300 1H-5 106 1 15 40 62000 262000 582500 28600 28 13 3.8 0.5 1 0.4 20800 12500 1H-5 106 3 58 40 40000 173000 709100 29900 35 20 4.5 0.6 1 0.6 20300 11500 1H-5 106 3 59 0 41000 178000 708100 29500 36 19 4.6 0.7 1.1 0.6 19700 11400 "Notes: Oxygen (O2) and nitrogen (N2) concentrations are included as a guide to the amount of air contamination in each sample. C1 through C6 = 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. C1/C2 = the methane/ethane ratio, and C1/C2+ = the ratio of methane/the sum of (C2 through C6). " "Min. = minutes, and Sec. = seconds. Total gas volumes released from the chambers are reported in Table 4."