Table T10. Concentrations of hydrocarbon gases in headspace gas samples, Site U1412.
| Core, section, interval (cm) |
Depth (mbsf) |
Methane (ppmv) |
Ethane (ppmv) |
Propane (ppmv) |
C1/C2+ |
|---|---|---|---|---|---|
| 344-U1412A- | |||||
| 1H-2, 0–5 | 1.50 | 4.25 | ND | ND | — |
| 1H-3, 0–5 | 3.00 | 6.15 | ND | ND | — |
| 1H-4, 93–98 | 5.43 | 16.3 | ND | ND | — |
| 2H-3, 0–5 | 8.90 | 59.4 | 0.420 | ND | 141 |
| 2H-6, 67–72 | 14.09 | 8,500 | 1.44 | ND | 5,920 |
| 2H-7, 101–106 | 15.27 | 8,410 | 0.855 | ND | 9,830 |
| 3H-2, 0–5 | 16.90 | 3,880 | 0.602 | ND | 6,450 |
| 3H-3, 0–5 | 18.40 | 14,300 | 0.850 | ND | 9,550 |
| 3H-6, 145–150 | 24.35 | 7,290 | 0.404 | ND | 18,000 |
| 4H-3, 0–5 | 27.90 | 7,690 | 0.612 | ND | 7,220 |
| 4H-5, 0–5 | 30.93 | 7,090 | 0.492 | ND | 6,380 |
| 5H-4, 0–5 | 36.27 | 10,900 | 0.645 | ND | 16,900 |
| 5H-7, 128–133 | 40.36 | 3,960 | ND | ND | — |
| 6H-3, 0–5 | 44.95 | 7,470 | 0.669 | ND | 5,220 |
| 6H-5, 0–5 | 47.99 | 268 | ND | ND | — |
| 7H-3, 0–5 | 51.97 | 1,300 | ND | ND | — |
| 7H-6, 0–5 | 55.97 | 406 | ND | ND | 813 |
| 8H-2, 0–5 | 59.01 | 3,760 | ND | ND | — |
| 8H-4, 0–5 | 61.73 | 734 | ND | ND | — |
| 9H-3, 0–5 | 65.87 | 893 | ND | ND | — |
| 9H-7, 0–5 | 70.61 | 5,780 | 0.692 | ND | 8,360 |
| 10H-2, 0–5 | 73.70 | 2,860 | ND | ND | — |
| 10H-6, 0–5 | 79.70 | 10,500 | 0.979 | ND | 7,540 |
| 11H-3, 0–5 | 84.04 | 5,490 | ND | ND | — |
| 12H-2, 0–5 | 87.67 | 2,820 | 0.825 | ND | 3,420 |
| 12H-4, 0–5 | 90.24 | 3,590 | 0.806 | ND | 4,460 |
| 13H-3, 0–5 | 93.70 | 755 | ND | ND | — |
| 14H-3, 0–5 | 98.33 | 4,850 | 0.828 | ND | 5,860 |
| 15H-3, 0–5 | 106.86 | 6,090 | 1.89 | ND | 3,220 |
| 16X-3, 0–5 | 111.09 | 4,210 | 1.20 | ND | 3,500 |
| 17X-3, 0–5 | 115.94 | 6,520 | 0.995 | ND | 6,550 |
| 17X-6, 0–5 | 119.72 | 6,220 | 1.57 | 0.396 | 3,160 |
| 18X-1, 0–5 | 122.70 | 4,900 | 0.750 | ND | 6,530 |
| 18X-3, 0–5 | 125.41 | 4,580 | 1.27 | ND | 3,600 |
| 19X-2, 0–5 | 133.90 | 3,180 | ND | ND | — |
| 19X-4, 0–5 | 136.57 | 7,670 | 1.78 | ND | 4,300 |
| 20X-2, 0–5 | 143.60 | 5,070 | 1.28 | ND | 3,960 |
| 20X-5, 0–5 | 148.11 | 4,410 | 1.89 | ND | 2,330 |
| 21X-1, 0–5 | 151.80 | 31,400 | 3.58 | ND | 8,780 |
| 21X-3, 0–5 | 154.58 | 5,960 | 2.72 | ND | 2,190 |
| 22X-1, 0–5 | 162.76 | 7,070 | 1.83 | ND | 3,870 |
| 22X-2, 0–5 | 163.01 | 2,030 | 0.516 | ND | 3,930 |
| 23X-2, 0–5 | 172.70 | 2,650 | 1.52 | ND | 1,740 |
| 23X-4, 0–5 | 175.40 | 1,980 | 1.47 | ND | 1,350 |
| 24X-3, 0–5 | 182.59 | 26,800 | 3.06 | ND | 8,760 |
| 25X-3, 0–5 | 191.94 | 16,300 | 2.66 | ND | 6,130 |
| 344-U1412B- | |||||
| 1H-2, 0–5 | 1.50 | 218 | 1.67 | ND | 83.4 |
| 1H-4, 0–5 | 4.50 | 10.3 | ND | ND | — |
| 3X-2, 0–5 | 156.62 | 6,050 | 6.28 | 0.625 | 641 |
| 4X-3, 0–5 | 168.17 | 10,600 | 2.47 | ND | 3,590 |
| 5X-2, 0–5 | 176.60 | 4,400 | 1.57 | ND | 2,080 |
| 6X-3, 0–5 | 187.00 | 5,440 | 0.88 | ND | 6,150 |
| 7X-3, 0–5 | 196.24 | 15,500 | 1.44 | 0.438 | 8,240 |
| 8X-1, 0–5 | 204.30 | 9,040 | 1.22 | ND | 7,430 |
| 11X-1, 40–45 | 228.90 | 15,000 | 8.64 | 2.52 | 1,340 |
| 12X-1, 23–28 | 233.63 | 17,100 | 11.9 | ND | 1,430 |
| 344-U1412C- | |||||
| 2R-1, 109–114 | 301.09 | 1,570 | 1.20 | ND | 1,310 |
| 5R-1, 31–36 | 329.11 | 5,550 | 7.17 | ND | 775 |
| 6R-1, 9–14 | 338.59 | 1,900 | 3.03 | ND | 628 |
| 6R-6, 0–5 | 344.77 | 1,720 | 4.10 | ND | 420 |
| 7R-2, 96–101 | 350.31 | 4,920 | 4.22 | ND | 1,170 |
| 8R-2, 0–5 | 359.38 | 3,380 | 3.34 | 3.08 | 527 |
| 8R-6, 0–5 | 364.49 | 9,560 | 3.10 | ND | 3,090 |
| 9R-3, 0–5 | 369.32 | 4,760 | 3.72 | 0.509 | 1,130 |
— = incalculable. ND = not detected.
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