Table T3. Hydrocarbon gas concentrations in headspace, Holes 1227A and 1227D.
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
24 hr @ 22°C
20 min @ 60°C
24 hr @ 22°C
20 min @ 60°C
24 hr @ 22°C
201-1227A-









1H-1, 130-135 1.30
37.8 7.5
0.2 0.03
0.0 0.00
1H-2, 130-135 2.80
37.7 7.0
0.2 0.04
0.0 0.00
1H-3, 130-135 4.30 14.9
* 0.0
* 0.0
*
1H-4, 0-5 4.50
55.8 11.1
0.3 0.06
0.0 0.00
2H-1, 130-135 6.90
31.9 7.9
0.5 0.12
0.0 0.00
2H-3, 130-135 9.90 11.2
* 0.0
* 0.0
*
2H-4, 130-135 11.40
66.8 14.7
1.5 0.32
0.0 0.00
2H-6, 130-135 14.40 51.3
* 0.7
* 0.0
*
3H-1, 130-135 16.40
145.1 29.4
2.5 0.50
0.0 0.00
3H-3, 130-135 19.40 93.1
* 1.3
* 0.0
*
3H-4, 130-135 20.90
167.2 35.9
2.6 0.55
0.0 0.00
3H-6, 130-135 23.90 108.8
* 1.8
* 0.0
*
4H-1, 97-102 25.57
166.7 35.1
3.5 0.73
0.0 0.00
4H-5, 90-95 31.16 115.1
* 2.1
* 0.0
*
4H-6, 145-150 32.81
162.5 33.3
2.9 0.59
0.0 0.00
4H-6, 145-150 32.81 213.4
* 4.3
* 0.0
*
5H-1, 130-135 35.40
282.5 55.3
3.4 0.67
0.0 0.00
5H-2, 130-135 36.90 471.8
* 3.6
* 0.0
*
5H-3, 130-135 38.40
1,014.9 209.2
5.8 1.19
0.3 0.05
5H-4, 130-135 39.90
1,564.5 322.9
9.0 1.86
0.6 0.12
5H-5, 130-135 41.40 1,638.1
* 5.5
* 0.4
*
5H-6, 130-135 42.90
2,354.1 570.6
8.5 2.05
0.9 0.21
6H-1, 130-135 44.90
3,286.5 972.2
7.1 2.10
0.8 0.22
6H-2, 130-135 46.40 3,319.9
* 5.0
* 0.7
*
6H-3, 130-135 47.90
6,594.5 2,052.4
9.8 3.04
1.7 0.53
6H-4, 130-135 49.40 1,922.1
* 3.2
* 0.4
*
7H-1, 130-135 54.40 6,878.3
* 6.8
* 1.4
*
7H-3, 0-5 56.10
14,174.6 2,592.1
12.6 2.31
3.5 0.64
9H-1, 130-135 73.40
7,201.9 1,306.6
8.0 1.45
3.1 0.55
9H-2, 145-150 75.05 5,350.7
* 6.1
* 2.3
*
9H-4, 0-5 76.60
6,590.2 1,307.4
8.3 1.65
2.7 0.54
10H-1, 145-150 83.05
16,620.1 3,226.4
11.0 2.14
3.7 0.72
10H-3, 145-150 86.05
16,718.0 3,377.5
13.3 2.68
4.4 0.90
10H-4, 130-135 87.40 8,497.2
* 8.4
* 2.4
*
11H-1, 130-135 92.40
9,972.4 1,940.1
8.8 1.71
2.7 0.52
11H-3, 0-5 94.10 6,534.5
* 7.5
* 2.6
*
12H-1, 145-150 102.05
5,836.4 1,017.0
3.9 0.68
0.8 0.14
12H-3, 145-150 105.05 2,051.9
* 3.7
* 1.8
*
12H-4, 130-135 106.40
7,211.5 1,291.3
7.4 1.32
2.3 0.42
13H-1, 130-135 111.40
13,908.4 2,486.6
11.7 2.09
3.1 0.56
13H-2, 145-150 113.05 10,091.2
* 8.9
* 3.1
*
13H-5, 0-5 116.10
15,127.4 2,778.2
9.7 1.79
2.7 0.50
14H-1, 130-135 120.90
14,111.4 2,591.6
10.9 2.00
2.6 0.47
14H-2, 145-150 122.55 3,157.0
* 2.6
* 0.8
*
14H-3, 0-5 122.60
8,125.0 1,454.9
9.5 1.70
3.5 0.63
17H-1, 80-85 132.90 1,908.5
* 5.3
* 2.3
*
18H-2, 0-5 142.95 4,296.6
* 9.9
* 2.7
*
201-1227D-









1H-1, 30-35 0.30
16.8

0.0 0.00
0.0 0.00
4H-1, 130-135 27.80
174.2

3.6 0.62
0.0 0.00
4H-2, 145-150 29.45
210.1

4.9 0.84
0.0 0.00
4H-3, 130-135 30.80
190.1

3.9 0.71
0.0 0.00
4H-4, 145-150 32.45
150.8

3.3 0.63
0.0 0.00
4H-5, 130-135 33.80
165.9

3.8 0.70
0.0 0.00
5H-1, 130-135 37.30
782.6

5.2 0.99
0.2 0.05
5H-2, 130-135 38.80
1,378.9

7.5 1.58
0.7 0.14
5H-3, 130-135 40.30
1,754.5

8.3 1.82
0.4 0.09
5H-4, 130-135 41.80
1,698.7

6.8 1.76
0.6 0.14
6H-1, 145-150 46.95
2,829.5

4.0 1.09
0.7 0.18
6H-2. 145-150 48.45
2,037.1

3.2 0.84
0.1 0.03
8H-2, 104-109 65.88
16,087.7

12.1 2.38
3.0 0.58

Notes: * = not reported due to systematically lower yields compared to 24-hr extraction protocol. This table is also available in ASCII.