Table T9. Composition of gas pockets in cores sampled through the core liner, Site 1200.
 
Core, section,
interval (cm)
Depth
(mbsf)
GC*
C1/C2
Methane
(ppmv)
Ethane
(ppmv)
Propane
(ppmv)
n-C4
(ppmv)
i-C4
(ppmv)
n-C5
(ppmv)
i-C5
(ppmv)
n-C6
(ppmv)
i-C6
(ppmv)
195-1200D-











6H-1, 50-51 22.00 NGA 464 919,175 1,982 24.3 4.2 1.2 1.2 0.9 0.3 0.2
6H-2, 10-11 22.97 NGA 467 918,456 1,968 24.8 4.3 1.3 1.2 1.0 0.3 0.2
8H-1, 42-43 25.42 NGA 477 944,420 1,979 24.7 4.4 1.3 1.3 1.0 0.3 0.2
195-1200E-











5H-1, 50-51 18.10 NGA 494 938,905 1,900 22.9 3.5 1.2 0.8 0.7 0.1 0.1
7H-1, 50-51 26.40 NGA 496 955,558 1,927 28.6 5.0 6.2 1.5 1.2 0.4 0.3
10H-1, 50-51 52.90 GC3 770 761,606 990 21.4





10H-1, 50-51 52.90 NGA 542 776,479 1,432 20.5 3.5 5.2 1.0 0.7 0.2 0.2
195-1200F-











1H-5, 50-51 6.50 NGA 399 952,983 2,391 42.5 7.4 2.3 2.3 1.8 0.6 0.4
1H-5, 50-51 6.50 GC3 560 937,680 1,675 44.3





2H-1, 50-51 8.20 NGA 301 904,245 3,005 58.2 9.5 3.1 2.8 2.2 0.7 0.5

Note: GC = gas chromatograph. * = the GC3 is more accurate for C1/C2 than the natural gas analyzer (NGA) but does not measure C4 through C6.