Initial Reports, Volume 201
Shipboard Scientific Party
Chapter 12, Table T7. Methane concentrations in headspace, Hole 1231B.

Note: * = used for concentration in interstitial water.

Core, section, interval (cm)	Depth (mbsf)	Methane (20 min, 60 C) (ppm in headspace)	Methane (1.5 days, 22 C) (ppm in headspace)	Methane (2.5 days, 22 C) (ppm in headspace)	Methane (uM)				

201-1231B-					
1H-1, 130-135	1.3		1.7	18.3*	2.7
1H-2, 130-135	2.8	1.8			0.1
2H-1, 130-135	4.7		5.1	22.6*	3.5
2H-3, 130-135	7.7	2			0.1
2H-6, 130-135	12.2		14.2	79.4*	12.5
3H-1, 130-135	14.2		8.9	37.3*	5.7
3H-3, 130-135	17.2	2.1			0.1
3H-6, 145-150	21.85		12.8	78.3*	12.7
4H-1, 130-135	23.7		12.5	69.4*	10.8
4H-3, 130-135	26.7	2.2			0.1
4H-5, 130-135	29.7		31.4	89.7*	15.4
5H-1, 130-135	33.2		16.2	76.0*	12.4
5H-3, 130-135	36.2	2			0.1
5H-6, 0-5	39.4		13.8	73.8*	12
6H-1, 130-135	42.7		18.2	96.9*	15.1
6H-3, 130-135	45.7	2.1			0.1
6H-6, 0-5	48.9		2.6*	2.9	0.2
7H-1, 130-135	52.2		2.1*		0.1
7H-3, 130-135	55.2	2.1			0.2
7H-6, 0-5	58.4		2.1*	1.6	0.1
8H-3, 0-5	63.4		1.9*		0.1
8H-4, 0-5	64.9	1.7			0
8H-6, 0-5	67.9		1.8*	1.6	0
9H-1, 130-135	71.2		2.3*		0.2
9H-4, 0-5	74.4	1.6			0
9H-6, 0-5	77.4		1.8*	1.6	0
10H-3, 0-5	82.4		2.5*		0.2
10H-4, 0-5	83.9	1.5			0
10H-6, 0-5	86.9		1.8*		0.1
11H-1, 130-135	90.2	1.6			0
11H-6, 0-5	96.4		1.8*	1.8	0
12H-1, 130-135	99.7	1.6			0
12H-4, 145-150	104.35		1.9*		0.1
13H-1, 130-135	110.7	1.6			0
13H-3, 130-135	113.7		1.8*		0