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.