Table T6.

Table T6. Composition of headspace gas in sediment, Hole 1131A.

Core, section Depth
(mbsf) CO₂(ppmv) H₂S
(ppmv) C₁(ppmv) C₂(ppmv) C₃(ppmv) C₄(ppmv) i-C₅(ppmv) n-C₅(ppmv) C₁/C₂

182-1131A-

1H-2
1.50
NA
NA
2

NA
NA
NA

2H-4
7.90
NA
NA
2

NA
NA
NA

3H-4
17.40
NA
NA
16

NA
NA
NA

4H-4
26.90
11,046
86
32
1

40

5H-4
36.40
13,606
3,435
128
3

49

6H-4
45.90
23,433
7,938
134
2

70

7H-4
55.40
21,389
8,681
243
2

128

8X-4
64.90
56,993
26,818
1,526
8

198

9X-4
72.10
71,682
35,116
3,263
13
3

257

10X-4
81.10
55,610
18,965
3,111
10
3

302

11X-4
89.90
72,572
27,796
4,752
13
4

363

12X-4
99.50
43,642
18,020
2,104
6
2

383

13X-4
109.10
69,216
28,673
4,778
11
3

442

14X-4
118.10
64,789
28,919
5,007
11
3

447

15X-4
127.10
78,977
41,216
7,677
17
5

449

16X-4
136.40
175,069
59,681
9,873
24
8

418

18X-3
153.60
66,663
12,604
5,877
13
4

456

19X-4
164.50
90,341
17,743
7,572
17
6

435

20X-4
173.80
89,231
10,887
6,358
14
5

448

21X-4
183.10
60,627
8,643
4,622
10
3

462

22X-4
192.70
97,873
16,900
8,631
20
6

438

23X-4
202.10
116,682
18,566
11,458
25
7

451

24X-4
211.10
115,646
17,633
10,329
24
7

423

25X-4
220.10
86,000
11,627
6,953
15
5

476

26X-4
229.50
131,571
3,734
7,368
19
7

388

27X-4
239.00
99,640
9,270
4,639
12
5

390

28X-4
248.00
106,718
14,618
6,634
15
5

434

30X-2
263.50
184,781
13,566
9,253
23
7

411

31X-4
275.90
135,094
19,225
8,243
21
6

387

32X-4
284.90
133,769
1,338
7,043
22
9

319

33X-4
294.90
141,318
35,332
7,005
19
6

363

34X-4
304.40
170,805
21,456
5,758
17
6

349

35X-3
312.50
162,103
26,055
5,285
17
7

315

36X-3
322.10
140,940
23,546
3,747
13
6

295

37X-3
331.70
97,752
9,583
2,171
8
4

271

38X-5
344.30
113,066
35,151
4,252
14
5

302

39X-2
349.50
61,069
526
1,760
7
4

241

40X-2
359.10
143,825
37,109
4,310
17
6

9
255

41X-4
371.70
104,933
12,993
2,630
12
5

221

42X-4
381.30
92,317
23,028
3,204
13
5

247

43X-3
389.40
130,898
33,745
4,497
22
8

205

44X-CC
395.90
76,480

1,993
14
8

8

147

45X-4
410.00

5,166
1,682
10
4

31
172

46X-CC
415.10
62,541
3,026
2,006
11
5

186

47X-4
429.20
75,795
14,746
2,675
16
6

7
170

48X-2
435.80
52,931
12,715
1,868
11
4

178

49X-4
448.50
84,592
12,945
2,280
15
6

5

155

50X-4
458.10
92,527
4,015
1,718
14
7

8

126

51X-4
467.70
106,092
7,678
2,408
17
6

143

52X-1
472.80
86,986
420
1,921
14
3

136

53X-4
487.00
95,004
12,475
1,392
12
5

6

120

54X-4
496.60
63,396
8,189
1,826
15
5

126

55X-3
504.70
58,949
6,759
1,300
11
4

118

56X-1
511.30
51,436
117
875
8
4

104

57X-1
520.90
44,001

709
8
1

91

58X-1
530.60
65,573

1,022
10
4

5

100

59X-CC
540.20
44,851

757
8

96

64X-CC
588.00
4,069

114
2

76

65X-CC
597.60
4,723

45

Core, section	Depth (mbsf)	CO₂(ppmv)	H₂S (ppmv)	C₁(ppmv)	C₂(ppmv)	C₃(ppmv)	C₄(ppmv)	i-C₅(ppmv)	n-C₅(ppmv)	C₁/C₂
182-1131A-
1H-2	1.50	NA	NA	2			NA	NA	NA
2H-4	7.90	NA	NA	2			NA	NA	NA
3H-4	17.40	NA	NA	16			NA	NA	NA
4H-4	26.90	11,046	86	32	1					40
5H-4	36.40	13,606	3,435	128	3					49
6H-4	45.90	23,433	7,938	134	2					70
7H-4	55.40	21,389	8,681	243	2					128
8X-4	64.90	56,993	26,818	1,526	8					198
9X-4	72.10	71,682	35,116	3,263	13	3				257
10X-4	81.10	55,610	18,965	3,111	10	3				302
11X-4	89.90	72,572	27,796	4,752	13	4				363
12X-4	99.50	43,642	18,020	2,104	6	2				383
13X-4	109.10	69,216	28,673	4,778	11	3				442
14X-4	118.10	64,789	28,919	5,007	11	3				447
15X-4	127.10	78,977	41,216	7,677	17	5				449
16X-4	136.40	175,069	59,681	9,873	24	8				418
18X-3	153.60	66,663	12,604	5,877	13	4				456
19X-4	164.50	90,341	17,743	7,572	17	6				435
20X-4	173.80	89,231	10,887	6,358	14	5				448
21X-4	183.10	60,627	8,643	4,622	10	3				462
22X-4	192.70	97,873	16,900	8,631	20	6				438
23X-4	202.10	116,682	18,566	11,458	25	7				451
24X-4	211.10	115,646	17,633	10,329	24	7				423
25X-4	220.10	86,000	11,627	6,953	15	5				476
26X-4	229.50	131,571	3,734	7,368	19	7				388
27X-4	239.00	99,640	9,270	4,639	12	5				390
28X-4	248.00	106,718	14,618	6,634	15	5				434
30X-2	263.50	184,781	13,566	9,253	23	7				411
31X-4	275.90	135,094	19,225	8,243	21	6				387
32X-4	284.90	133,769	1,338	7,043	22	9				319
33X-4	294.90	141,318	35,332	7,005	19	6				363
34X-4	304.40	170,805	21,456	5,758	17	6				349
35X-3	312.50	162,103	26,055	5,285	17	7				315
36X-3	322.10	140,940	23,546	3,747	13	6				295
37X-3	331.70	97,752	9,583	2,171	8	4				271
38X-5	344.30	113,066	35,151	4,252	14	5				302
39X-2	349.50	61,069	526	1,760	7	4				241
40X-2	359.10	143,825	37,109	4,310	17	6			9	255
41X-4	371.70	104,933	12,993	2,630	12	5				221
42X-4	381.30	92,317	23,028	3,204	13	5				247
43X-3	389.40	130,898	33,745	4,497	22	8				205
44X-CC	395.90	76,480		1,993	14	8		8		147
45X-4	410.00		5,166	1,682	10	4			31	172
46X-CC	415.10	62,541	3,026	2,006	11	5				186
47X-4	429.20	75,795	14,746	2,675	16	6			7	170
48X-2	435.80	52,931	12,715	1,868	11	4				178
49X-4	448.50	84,592	12,945	2,280	15	6		5		155
50X-4	458.10	92,527	4,015	1,718	14	7		8		126
51X-4	467.70	106,092	7,678	2,408	17	6				143
52X-1	472.80	86,986	420	1,921	14	3				136
53X-4	487.00	95,004	12,475	1,392	12	5		6		120
54X-4	496.60	63,396	8,189	1,826	15	5				126
55X-3	504.70	58,949	6,759	1,300	11	4				118
56X-1	511.30	51,436	117	875	8	4				104
57X-1	520.90	44,001		709	8	1				91
58X-1	530.60	65,573		1,022	10	4		5		100
59X-CC	540.20	44,851		757	8					96
64X-CC	588.00	4,069		114	2					76
65X-CC	597.60	4,723		45

Note: NA = not analyzed, blank = not detected.