Table T5. Hydrocarbon gas concentrations in headspace, Hole 1230A.
Core, section,
interval (cm)
Depth
(mbsf)
Methane
(ppm in headspace)
Methane
(µM)
Ethane
(ppm in headspace)
Ethane
(µM)
Propane
(ppm in headspace)
Propane
(µM)
20 min @
60°C
7 days @
22°C
20 min @
60°C
7 days @
22°C
20 min @
60°C
7 days @
22°C
201-1230A-









1H-1, 130-135 1.30
96 18
0.3 0.1
0.0 0.0
1H-2, 130-135 2.80 12
* 0.0
* 0.0
*
1H-3, 139-144 4.39
107 21
0.6 0.1
0.0 0.0
2H-1, 130-135 6.10
308 56
0.9 0.2
0.0 0.0
2H-2, 130-135 7.60 297
* 0.0
* 0.0
*
2H-3, 130-135 9.10
9,787 1,852
1.5 0.3
0.0 0.0
2H-4, 130-135 10.60
18,635 3,778
1.2 0.2
0.0 0.0
2H-5, 130-135 12.10
24,398 4,788
1.4 0.3
0.0 0.0
2H-6, 130-135 13.60 11,686
* 0.6
* 0.0
*
3H-1, 130-135 15.60
23,801 5,076
1.4 0.3
0.0 0.0
3H-2, 130-135 17.10 19,625
* 0.8
* 0.0
*
3H-3, 130-135 18.60
33,782 7,196
1.9 0.4
0.0 0.0
3H-4, 130-135 20.10
22,728 4,593
1.9 0.4
0.9 0.2
3H-5, 130-135 21.60
21,777 4,427
1.8 0.4
1.6 0.3
3H-6, 130-135 23.10 15,390
* 0.6
* 0.0
*
4H-1, 145-150 25.25
29,279 6,062
1.8 0.4
1.1 0.2
4H-2, 130-135 26.60 13,767
* 171.7
* 287.1
*
4H-4, 0-5 28.30
27,178 5,486
2.2 0.4
1.7 0.3
4H-4, 145-150 29.75
25,054 5,193
2.0 0.4
1.4 0.3
4H-6, 0-5 31.30 8,798
* 1.8
* 2.3
*
5H-1, 145-150 34.75 7,282
* 0.7
* 0.0
*
5H-3, 0-5 36.30
30,033 6,379
2.1 0.5
0.5 0.1
5H-6, 0-5 40.80
27,186 5,398
2.0 0.4
1.0 0.2
6H-1, 130-135 44.10
18,322 3,815
1.9 0.4
1.2 0.2
6H-4, 0-5 47.38 9,910
* 0.7
* 0.0
*
6H-6, 0-5 50.38
22,898 4,827
1.8 0.4
1.0 0.2
8H-2, 145-150 57.25
15,295 3,219
1.5 0.3
1.0 0.2
8H-3, 130-135 58.60
21,668 4,477
1.8 0.4
0.9 0.2
8H-5, 0-5 60.30 4,390
* 0.0
* 0.0
*
9H-1, 130-135 62.10
25,098 5,201
1.7 0.4
0.8 0.2
9H-4, 135-140 65.45 8,627
* 0.6
* 0.0
*
9H-6, 130-135 68.20
28,139 5,769
2.0 0.4
0.8 0.2
10H-2, 0-5 71.80
29,440 5,907
1.3 0.3
0.5 0.1
10H-4, 0-5 74.80 4,991
* 0.0
* 0.0
*
10H-6, 0-5 77.80
32,417 6,689
2.0 0.4
1.6 0.3
11H-1, 130-135 81.10
21,315 4,410
1.2 0.3
0.8 0.2
11H-5, 130-135 87.10
20,388 4,367
0.8 0.2
1.0 0.0
12H-2, 130-135 92.10 3,849
* 0.0
* 0.0
*
12H-4, 0-5 93.80
14,985 3,246
1.1 0.2
0.5 0.1
12H-5, 0-5 95.30
13,489 2,947
1.0 0.2
0.3 0.1
13H-1, 130-135 100.10 2,699
* 0.0
* 0.0
*
13H-2, 145-150 101.75
20,214 4,240
1.9 0.4
1.2 0.3
13H-5, 0-5 104.80
18,184 3,762
1.8 0.4
1.5 0.3
14H-1, 130-135 109.60 4,799
* 0.0
* 0.0
*
14H-4, 0-5 112.87
32,414 7,091
2.4 0.5
1.7 0.4
14H-5, 130-135 115.67
15,753 3,525
1.2 0.3
0.7 0.2
15H-3, 0-5 119.62 2,832
* 0.4
* 0.0
*
15H-5, 137-142 123.99
25,023 5,534
1.5 0.3
1.2 0.3
15H-7, 130-135 126.84
18,375 4,152
1.3 0.3
1.0 0.2
17H-1, 130-135 130.60
19,981 4,348
1.1 0.2
0.7 0.2
17H-3, 0-5 132.30 4,494
* 0.4
* 0.0
*
18H-2, 130-135 141.60 5,860 21,028 4,629 0.0 1.6 0.3 0.0 1.3 0.3
19H-3, 0-5 150.62 2,911
* 0.5
* 0.0
*
21H-2, 0-5 159.70 13,575
* 2.6
* 0.0
*
21H-4, 0-5 161.78
24,508 5,167
2.6 0.5
2.4 0.5
22H-1, 70-75 169.00
22,781 4,986
2.9 0.6
3.7 0.8
24H-1, 130-135 188.60 3,921 15,490 3,481 1.2 3.2 0.7 0.0 3.9 0.9
26H-1, 80-82 199.60
12,899 3,126
4.9 1.2
5.1 1.2
27H-1, 90-95 207.20
14,241 3,185
5.3 1.2
5.4 1.2
30X-1, 125-130 227.55
19,880 5,133
19.2 4.9
31.9 8.2
30X-1, 130-135 227.60 5,128
* 8.6
* 14.2
*
31X-1, 130-135 230.90 4,142 11,466 2,953 8.0 10.8 2.8 13.0 13.0 3.3
33X-1, 125-130 235.65
16,442 4,424
25.0 6.7
45.8 12.3
34H-1, 54-59 244.54 3,223 11,570 2,925 7.4 13.9 3.5 14.2 50.8 12.8
35X-2, 145-150 248.01
10,958 2,861
9.7 2.5
29.4 7.7
35X-4, 0-5 249.56 5,532
* 48.5
* 24.6
*
35X-6, 130-132 253.37
14,185 3,325
52.8 12.4
20.6 4.8
37X-1, 115-120 258.75 8,291
* 64.0
* 59.1
*
38X-2, 0-5 268.70 5,146
* 18.5
* 34.0
*

Notes: * = not calculated due to systematically lower values compared to 8-day extraction. This table is also available in ASCII.