Table T1.
Concentration of C2-C6 hydrocarbon gases detected by purge-trap analysis in sediments, Site 1109.
Core, section, interval (cm)
Depth (mbsf)
Concentration (pmol/g dry sediment)
Ethane
Propane
Isobutane
Butane
Isobutylene + 1 butane
trans-
2-Butene
Isopentane
2-Methylpentane
3-Methylpentane
Hexane
180-1109B-
1H-1, 140-145
1.40
25
13
8
9
8
15
180-1109C-
10H-4, 145-150
89.35
41
28
3
4
18X-3, 145-150
164.55
54
67
2
7
56
17
15
42
26X-1, 110-115
238.10
8
2
1
1
10
42
52
142
40X-3, 145-150
366.65
27
2
5
37
93
98
165
18R-4, 90-95
517.42
78
34
3
35
71
137
202
34R-3, 93-98
660.74
36
6
3
149
12
12
276
285
716