Table 2. Description of gas samples after hydrate dissociation.
 
Gas sample number* Hole, core,
section
Hydrate specimen number*** Sample depth (mbsf)**** Gas volume** (cm3) CH4*****
(%)
Water volume (cm3) Water
Cl-
Gas/water ratio Storage (months)

1

994C-31X-7

1

260

617

98.8

4

57

154

7

2

996B-1H-1

1

0

347

99.3

6.5

169

53

1.5

3

996B-1H-1

2

0

183

99.4

9.1

248

20

7

4

996C-1H-1

1

0

195

99.5

3.3

294

65

1.5

5

996C-1H-1

2

0

369

NA

4.8

245

98

7

6

996E-7H-CC

1

61

908

99.7

6.4

21

143

1.5

7

997A-42X-3

1A

331

1250

98.4

9.0

187

139

1.5

8

997A-42X-3

1B

331

(1250)

(98.4)

(9.0)

(187)

(139)

7

Notes: * = numbering scheme used in Table 2 and Table 3 and Figure 3, Figure 4, Figure 5. *** = numbering taken from tables in Paull, Matsumoto, Wallace, et al. (1996) where A and B designate successive gas samples of the same hydrate specimen. **** = approximate depth in the sediment column (placed at the top of the core in which the specimen was collected). ** = total volume of gas released from the hydrate specimen inside of the experimental chamber (Fig. 2). ***** = methane quantity determined on ship prior to shipping and storage of gas bottles. NA= not analyzed. From Paull, Matsumoto, Wallace, et al. (1996). Parentheses for gas sample 8 indicate that reported values are the same as for gas sample 7.