Table T2. Molecular and isotopic compositions and conversion ratio of void gas, Sites U1412 and U1413.
|
Core, section, interval (cm) |
Depth (mbsf) |
Methane (ppmv) |
Ethane (ppmv) |
Propane (ppmv) |
CO2 (ppmv) |
C1/C2+ |
δ13CCH4 (‰) |
δDCH4 (‰) |
δ13CCO2 (‰) |
δ13Corg (‰) |
Conversion ratio |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 344-U1412A- | |||||||||||
| 4H-4, 50–51 | 29.93 | 819,908 | 16.4 | 1.6 | 5,187 | 45,669 | –74.9 | –190 | –4.7 | –23.8 | 23.8 |
| 5H-4, 50–51 | 36.77 | 822,693 | 16.4 | 1.6 | 4,612 | 45,663 | –72.7 | –189 | –1.4 | –23.8 | 26.9 |
| 6H-1, 50–51 | 42.50 | 773,388 | 14.2 | 1.0 | 1,703 | 50,841 | –70.9 | –189 | 0.3 | –24.4 | 29.3 |
| 7H-1, 50–51 | 50.00 | 840,741 | 16.8 | 1.2 | 3,389 | 46,640 | –70.2 | –188 | 1.4 | –24.5 | 30.4 |
| 9H-2, 50–51 | 64.87 | 834,864 | 29.6 | 1.0 | 4,436 | 27,255 | –69.5 | –189 | 0.8 | –24.8 | 30.5 |
| 9H-7, 50–51 | 71.11 | 849,071 | 56.1 | ND | 1,908 | 15,156 | –69.8 | –193 | –0.8 | –23.6 | 28.2 |
| 11H-4, 50–51 | 85.75 | 849,076 | 28.0 | 2.7 | 2,571 | 27,603 | –68.7 | –187 | 0.8 | –24.7 | 30.7 |
| 12H-2, 50–51 | 88.17 | 842,363 | 54.5 | 2.2 | 3,500 | 14,853 | –68.9 | –189 | –0.5 | –24.2 | 29.3 |
| 13H-4, 50–51 | 95.41 | 849,857 | 44.6 | 3.1 | 2,731 | 17,825 | –68.7 | –187 | –1.5 | –24.6 | 29.1 |
| 14H-3, 50–51 | 98.83 | 838,382 | 53.4 | 4.3 | 5,065 | 14,522 | –68.5 | –187 | –0.3 | –24.0 | 29.3 |
| 18X-3, 50–51 | 125.91 | 788,186 | 62.9 | 10.9 | 11,098 | 10,680 | –67.0 | –185 | –0.2 | –23.5 | 29.5 |
| 19X-2, 50–51 | 134.40 | 837,884 | 58.6 | 7.0 | 6,416 | 12,773 | –67.0 | –184 | –1.5 | –23.5 | 28.6 |
| 23X-4, 50–51 | 175.90 | 843,663 | 85.3 | 7.2 | 6,828 | 9,119 | –66.9 | –183 | –3.4 | –24.3 | 28.0 |
| 344-U1412B- | |||||||||||
| 6X-3, 50–51 | 187.50 | 845,587 | 28.4 | 0.6 | 5,358 | 29,207 | –64.3 | –189 | –10.4 | –24.2 | 22.6 |
| 7X-3, 50–51 | 196.74 | 850,241 | 46.7 | 2.9 | 8,708 | 17,135 | –64.8 | –188 | –10.8 | –24.1 | 21.8 |
| 344-U1413A- | |||||||||||
| 5H-3, 50–51 | 38.51 | 836,721 | 4.9 | 0.7 | 6,354 | 148,780 | –71.6 | –187 | 0.3 | –23.5 | 28.2 |
| 6H-1, 50–51 | 45.10 | 836,575 | 3.9 | 1.8 | 3,613 | 146,487 | –71.6 | –187 | –2.2 | –25.0 | 27.9 |
| 7H-5, 50–51 | 58.24 | 841,035 | 4.0 | 4.4 | 4,601 | 99,270 | –71.3 | –187 | –0.7 | –25.0 | 29.1 |
| 8H-6, 50–51 | 68.56 | 830,880 | 4.2 | 5.0 | 5,182 | 90,938 | –71.5 | –187 | –0.5 | –26.0 | 30.2 |
| 9H-3, 50–51 | 73.52 | 833,201 | 3.8 | 4.4 | 4,202 | 100,554 | –71.5 | –186 | –1.3 | –25.3 | 28.9 |
| 10H-1, 50–51 | 80.00 | 821,828 | 5.0 | 5.9 | 7,683 | 76,004 | –71.3 | –185 | –1.6 | –24.9 | 28.4 |
| 11H-3, 50–51 | 92.43 | 792,361 | 4.4 | 4.7 | 506 | 87,704 | –71.4 | –186 | –1.3 | –25.8 | 29.5 |
| 13H-6, 10–11 | 112.59 | 825,058 | 6.9 | 7.2 | 4,722 | 58,668 | –71.3 | –185 | –2.6 | –23.6 | 26.4 |
| 14H-2, 50–51 | 115.16 | 829,723 | 6.6 | 5.9 | 1,874 | 65,943 | –71.7 | –185 | — | –25.2 | — |
| 15H-3, 50–51 | 122.13 | 831,810 | 8.7 | 7.6 | 5,739 | 51,118 | –72.0 | –187 | –2.8 | –25.5 | 28.0 |
| 16H-4, 50–51 | 128.99 | 828,144 | 9.2 | 6.6 | 3,848 | 52,397 | –72.3 | –184 | –3.6 | –25.9 | 27.7 |
| 18H-2, 50–51 | 137.62 | 825,281 | 11.5 | 5.6 | 4,412 | 48,126 | –73.0 | –183 | –3.8 | –25.6 | 27.0 |
ND = no detection, — = no measurement.
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