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