Initial Reports, Volume 201
Shipboard Scientific Party
Chapter 8, Table T3. Hydrocarbon gas concentrations in headspace, Holes 1227A and 1227D.

Note: * = not reported due to systematically lower yields compared to 24-hr extraction protocol.

Core, section, interval (cm)	Depth (mbsf)	Methane (20 min, 60 C) (ppm in headspace)	Methane (24 hr, 22 C) (ppm in headspace)	Methane (uM)	Ethane (20 min, 60 C) (ppm in headspace)	Ethane (24 hr, 22 C) (ppm in headspace)	Ethane (uM)	Propane (20 min, 60 C) (ppm in headspace)	Propane (24 hr, 22 C) (ppm in headspace)	Propane (uM)	

201-1227A-										
1H-1, 130-135	1.3		37.8	7.5		0.2	0.03		0	0
1H-2, 130-135	2.8		37.7	7		0.2	0.04		0	0
1H-3, 130-135	4.3	14.9		*	0		*	0		*
1H-4, 0-5	4.5		55.8	11.1		0.3	0.06		0	0
2H-1, 130-135	6.9		31.9	7.9		0.5	0.12		0	0
2H-3, 130-135	9.9	11.2		*	0		*	0		*
2H-4, 130-135	11.4		66.8	14.7		1.5	0.32		0	0
2H-6, 130-135	14.4	51.3		*	0.7		*	0		*
3H-1, 130-135	16.4		145.1	29.4		2.5	0.5		0	0
3H-3, 130-135	19.4	93.1		*	1.3		*	0		*
3H-4, 130-135	20.9		167.2	35.9		2.6	0.55		0	0
3H-6, 130-135	23.9	108.8		*	1.8		*	0		*
4H-1, 97-102	25.57		166.7	35.1		3.5	0.73		0	0
4H-5, 90-95	31.16	115.1		*	2.1		*	0		*
4H-6, 145-150	32.81		162.5	33.3		2.9	0.59		0	0
4H-6, 145-150	32.81	213.4		*	4.3		*	0		*
5H-1, 130-135	35.4		282.5	55.3		3.4	0.67		0	0
5H-2, 130-135	36.9	471.8		*	3.6		*	0		*
5H-3, 130-135	38.4		1,014.90	209.2		5.8	1.19		0.3	0.05
5H-4, 130-135	39.9		1,564.50	322.9		9	1.86		0.6	0.12
5H-5, 130-135	41.4	1,638.10		*	5.5		*	0.4		*
5H-6, 130-135	42.9		2,354.10	570.6		8.5	2.05		0.9	0.21
6H-1, 130-135	44.9		3,286.50	972.2		7.1	2.1		0.8	0.22
6H-2, 130-135	46.4	3,319.90		*	5		*	0.7		*
6H-3, 130-135	47.9		6,594.50	2,052.40		9.8	3.04		1.7	0.53
6H-4, 130-135	49.4	1,922.10		*	3.2		*	0.4		*
7H-1, 130-135	54.4	6,878.30		*	6.8		*	1.4		*
7H-3, 0-5	56.1		14,174.60	2,592.10		12.6	2.31		3.5	0.64
9H-1, 130-135	73.4		7,201.90	1,306.60		8	1.45		3.1	0.55
9H-2, 145-150	75.05	5,350.70		*	6.1		*	2.3		*
9H-4, 0-5	76.6		6,590.20	1,307.40		8.3	1.65		2.7	0.54
10H-1, 145-150	83.05		16,620.10	3,226.40		11	2.14		3.7	0.72
10H-3, 145-150	86.05		16,718.00	3,377.50		13.3	2.68		4.4	0.9
10H-4, 130-135	87.4	8,497.20		*	8.4		*	2.4		*
11H-1, 130-135	92.4		9,972.40	1,940.10		8.8	1.71		2.7	0.52
11H-3, 0-5	94.1	6,534.50		*	7.5		*	2.6		*
12H-1, 145-150	102.05		5,836.40	1,017.00		3.9	0.68		0.8	0.14
12H-3, 145-150	105.05	2,051.90		*	3.7		*	1.8		*
12H-4, 130-135	106.4		7,211.50	1,291.30		7.4	1.32		2.3	0.42
13H-1, 130-135	111.4		13,908.40	2,486.60		11.7	2.09		3.1	0.56
13H-2, 145-150	113.05	10,091.20		*	8.9		*	3.1		*
13H-5, 0-5	116.1		15,127.40	2,778.20		9.7	1.79		2.7	0.5
14H-1, 130-135	120.9		14,111.40	2,591.60		10.9	2		2.6	0.47
14H-2, 145-150	122.55	3,157.00		*	2.6		*	0.8		*
14H-3, 0-5	122.6		8,125.00	1,454.90		9.5	1.7		3.5	0.63
17H-1, 80-85	132.9	1,908.50		*	5.3		*	2.3		*
18H-2, 0-5	142.95	4,296.60		*	9.9		*	2.7		*

201-1227D-										
1H-1, 30-35	0.3		16.8			0	0		0	0
4H-1, 130-135	27.8		174.2			3.6	0.62		0	0
4H-2, 145-150	29.45		210.1			4.9	0.84		0	0
4H-3, 130-135	30.8		190.1			3.9	0.71		0	0
4H-4, 145-150	32.45		150.8			3.3	0.63		0	0
4H-5, 130-135	33.8		165.9			3.8	0.7		0	0
5H-1, 130-135	37.3		782.6			5.2	0.99		0.2	0.05
5H-2, 130-135	38.8		1,378.90			7.5	1.58		0.7	0.14
5H-3, 130-135	40.3		1,754.50			8.3	1.82		0.4	0.09
5H-4, 130-135	41.8		1,698.70			6.8	1.76		0.6	0.14
6H-1, 145-150	46.95		2,829.50			4	1.09		0.7	0.18
6H-2. 145-150	48.45		2,037.10			3.2	0.84		0.1	0.03
8H-2, 104-109	65.88		16,087.70			12.1	2.38		3	0.58