Table 3. Water and gas information of PCS cores at Sites 994, 995, 996, and 997.
 
Core Core volume (cm3)** Porosity (%)*** Pore
water mass
(kg)§		 Total
water mass (kg)****		 Total CH4 amount (mol)***** Pore CH4 conc.
(mol/kg)§§		 Total CH4 conc.
(mol/kg)

164-994C-







70P
277
58
0.17
4.00
0.03
0.15
0.01

164-995A-








0P*
0
0
0.00
4.12
0.00
--
0.00

18P
970
64
0.64
3.76
0.02
0.03
0.01

27P
1385
60
0.86
3.55
0.17
0.20
0.05

36P
1039
57
0.61
3.66
0.06
0.09
0.02

45P
804
56
0.46
3.76
0.18
0.38
0.05

48P
319
54
0.18
3.97
0.03
0.18
0.01

52P*
0
0
0.00
4.12
0.00
--
0.00

52P
249
55
0.14
4.00
0.10
0.69
0.02

60P
125
55
0.07
4.06
0.05
0.74
0.01

70P
42
54
0.02
4.10
0.01
0.38
0.00

164-995B-







7P
1288
57
0.76
3.55
0.10
0.13
0.03

10P
901
56
0.52
3.71
0.04
0.07
0.01

164-996A-







7P
277
55
0.16
3.99
0.22
1.43
0.06

164-996D-








7P
0
0
0.00
4.12
0.34
--
0.08

164-996E-








8P
0
0
0.00
4.12
0.02
--
0.00

164-997A-







18P
582
63
0.38
3.90
0.01
0.03
0.00

25P
1219
61
0.77
3.63
0.31
0.41
0.09

33P
0
0
0.00
4.12
0.01
--
0.00

49P
887
55
0.50
3.71
0.29
0.58
0.08

55P
693
56
0.40
3.81
0.26
0.66
0.07

164-997B-







10P
194
56
0.11
4.03
0.21
1.89
0.05

15P
416
58
0.25
3.94
0.13
0.54
0.03

21P
1302
52
0.70
3.48
0.14
0.20
0.04

29P*
0
0
0.00
4.12
0
--
0.00

32P
0
0
0.00
4.12
0
--
0.00

36P
0
0
0.00
4.12
0
--
0.00

40P
0
0
0.00
4.12
0
--
0.00

44P
0
0
0.00
4.12
0
--
0.00

Notes: ** = (core length × pi × 2.1 cm2). *** = average porosity from Paull, Matsumoto, Wallace, et al. (1996). § = (pore volume × density of seawater). **** = [total mass = borehole volume (4 L) - sediment volume x density of seawater], where sediment volume = (core volume - pore volume); ***** = ideal gas law at 15°C and 1 atm, with volumes as in Table 2. §§ = assumes all methane from sediment core. Boldface values are from samples that should have hydrate at 0°C, although not necessarily at in situ conditions. -- = not calculated. * = runs where the PCS was configured to collect a water sample only, no core was taken.