Table T2. Concentrations of C2-C6 hydrocarbon gases detected by purge-trap analysis in sediments, Site 1115.

Table T2. Concentrations of C₂-C₆ hydrocarbon gases detected by purge-trap analysis in sediments, Site 1115.

Core, section, interval (cm) Depth
(mbsf) Concentration (pmol/g dry sediment)

Ethane

Propane

Isobutane

Butane

Isobutylene
+ 1-butene

cis-2-Butene

1,3-Butadiene

Pentane

2,2-Dimethylbutane

2-Methylpentane

3-Methylpentane

Hexane

180-1115A-

1H-2, 117-122 1.45 8 5

14 13 17

180-1115B-

3H-3, 115-120 20.85 0 3

10H-3, 115-120 87.35 11 19
7 7

180-1115C-

3R-5, 145-150 309.95 57 4
5 12

22 24 19

11R-4, 0-5 383.42 22 1
6 13

7 9 40

21R-2, 56-61 476.28 10 8 1 3 12

29R-3, 48-53 554.77 13 8
3 7

403 468 348

48R-1, 113-118 736.23 29 9

6 11

217 211 364

54R-4, 110-115 797.84 29 14
2 9
4 4 102 39
110

Core, section, interval (cm)	Depth (mbsf)	Concentration (pmol/g dry sediment)
Core, section, interval (cm)	Depth (mbsf)	Ethane	Propane	Isobutane	Butane	Isobutylene + 1-butene	cis-2-Butene	1,3-Butadiene	Pentane	2,2-Dimethylbutane	2-Methylpentane	3-Methylpentane	Hexane
180-1115A-
1H-2, 117-122	1.45	8	5								14	13	17
180-1115B-
3H-3, 115-120	20.85	0	3
10H-3, 115-120	87.35	11	19		7	7
180-1115C-
3R-5, 145-150	309.95	57	4		5	12					22	24	19
11R-4, 0-5	383.42	22	1		6	13					7	9	40
21R-2, 56-61	476.28	10	8	1	3	12
29R-3, 48-53	554.77	13	8		3	7					403	468	348
48R-1, 113-118	736.23	29	9			6	11				217	211	364
54R-4, 110-115	797.84	29	14		2	9		4	4	102	39		110