Table
T4. Composition of headspace gas in sediment, Site
1129.
Core,
section
Depth
(mbsf)
CO2
(ppmv)H2S
(ppmv)C1
(ppmv)C2
(ppmv)C3
(ppmv)i-C4
(ppmv)
n-C4
(ppmv)
i-C5
(ppmv)
n-C5
(ppmv)
n-C6
(ppmv)
i-C6
(ppmv)
C1/C2
182-1129B-
1H-6
29.50
NA
NA
2
NA
NA
NA
NA
NA
NA
182-1129C-
1H-4
4.50
NA
NA
3
NA
NA
NA
NA
NA
NA
2H-4
11.80
NA
NA
2
NA
NA
NA
NA
NA
NA
3H-4
21.30
NA
NA
2
NA
NA
NA
NA
NA
NA
4H-4
30.80
NA
NA
2
NA
NA
NA
NA
NA
NA
5H-4
40.30
NA
NA
6
NA
NA
NA
NA
NA
NA
6H-4
49.80
8,350
65
2
40
7H-4
59.30
6,677
122
3
49
8H-4
68.80
19,888
1,863
208
4
55
9H-4
78.30
17,816
736
271
5
60
10H-4
87.80
22,027
1,839
314
5
67
11H-4
97.30
24,730
2,791
331
4
1
75
12H-4
106.80
34,238
5,039
637
8
85
13H-4
116.30
26,275
1,688
595
7
89
14H-4
125.80
39,351
4,924
662
7
2
91
15H-4
135.30
64,058
4,133
1,368
15
4
94
16H-4
144.80
45,101
3,346
845
9
2
94
17H-4
154.30
44,490
3,934
1,081
10
3
108
18H-4
163.80
82,676
6,682
2,643
26
8
6
102
19H-4
173.30
57,004
6,527
1,949
15
5
127
20H-4
182.80
11,610
524
1,927
14
4
136
22H-4
201.80
47,186
4,732
1,535
9
3
169
25X-3
228.70
149,812
17,355
6,196
20
6
316
26X-3
238.20
139,830
19,505
9,363
27
8
348
27X-4
249.20
192,587
27,019
9,088
25
8
368
28X-4
258.90
170,364
27,218
12,043
29
9
417
29X-4
268.40
181,259
29,801
6,093
14
5
429
30X-4
277.80
163,853
28,905
8,066
18
6
451
33X-4
305.50
176,658
24,972
6,070
13
5
474
34X-4
314.90
145,993
31,680
7,113
14
6
501
35X-4
324.30
163,143
40,445
8,922
20
10
6
440
36X-4
333.60
69,562
4,779
5,475
11
5
485
37X-4
342.50
125,862
12,322
8,928
17
6
519
38X-2
348.40
125,733
22,957
7,027
14
7
4
513
39X-2
357.20
NA
NA
7,889
17
9
NA
NA
NA
456
40X-3
368.00
104,853
20,525
6,576
14
7
5
484
41X-1
374.50
120,686
22,253
8,817
19
10
8
474
43X-2
394.90
7,741
257
11,267
21
9
5
534
44X-1
403.60
3,600
9
4
5
387
45X-1
413.30
2,328
8,256
17
9
5
500
46X-4
427.40
9,202
9,080
15
8
605
47X-1
432.40
2,837
2,291
6
5
402
48X-2
443.50
6,351
8,666
17
10
6
516
182-1129D-
1R-1
280.00
91,583
1,317
11,167
24
8
5
458
2R-1
289.80
81,005
8,785
9,360
19
7
488
3R-1
373.61
4,987
4,249
8
5
506
10R-2
441.78
4,785
6,132
12
7
6
533
11R-2
451.80
6,112
8,400
17
10
17
14
12
6
506
12R-1
460.49
2,363
7,897
14
7
9
10
7
5
15
8
572
13R-4
474.00
2,675
6,638
13
8
9
523
14R-2
480.60
4,831
6,697
15
11
7
10
438
15R-2
490.20
28,512
6,098
12
6
6
526
16R-4
502.80
19,717
4,412
10
6
8
437
17R-3
510.90
7,149
2,790
6
3
465
18R-2
519.05
19,088
276
1,984
5
3
413
19R-2
528.60
24,920
1,875
5
3
4
46
5
354
20R-4
541.30
22,957
1,366
4
1
379
21R-4
550.83
27,470
1,318
6
3
235
22R-1
556.10
31,469
1,000
4
1
278
23R-CC
565.80
19,532
523
2
262
24R-1
575.40
9,355
235
2
157
Note: NA = not analyzed, blank = not detected.