Table T9. Composition of gas from analyses of decomposed samples of gas hydrate, Holes 1245B and 1245C.
Core, section, interval (cm)
Depth (mbsf)
C1
(ppmv)
C2 (ppmv)
C3 (ppmv)
i-C4 (ppmv)
n-C4 (ppmv)
n-C5 (ppmv)
n-C6 (ppmv)
CO2 (ppmv)
O2
(ppmv)
N2
(ppmv)
C1/C2
204-1245B-











6H-5, 103 53.5 811,962 13.4




3,737 28,288 132,907 60,730
9H-CC 84.8 939,965 20.7




2,238 10,643 36,935 45,431
204-1245C-











7H-5, 40 53.2 226,987





3,222 157,857 606,919
13H-4, 56-76 101.4 945,471 19.9




3,674 4,442 9,742 47,463

Note: C1 = methane, C2 = ethane, C3 = propane, i-C4 = isobutane, n-C4 = normal butane, n-C5 = normal pentane, n-C6 = normal hexane, CO2 = carbon dioxide, O2 = oxygen, N2 = nitrogen.