Table T21. Mass balance calculations based on degassing experiments, Site U1326.
| Core | Depth (mbsf) |
Total C1 released (10–3 mole) |
Total | C1 concentration (mM) |
In situ nondissolved C1 as percentage of pore volume if present as |
Potential pore water freshening caused by gas hydrate decomposition |
||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| At laboratory conditions | In situ |
Water release (mL) |
Freshening (%) |
|||||||||
| Top | Bottom | Dissolved* | Free† | Dissolved‡ | Nondissolved | Free gas | Gas hydrate | |||||
| 311-U1326C- | ||||||||||||
| 12P | 83.7 | 84.7 | 855 | 2965 | 1.8 | 2963 | 64.0 | 2901 | 35 | 40 | 90 | 18 |
Notes: * = extrapolated from analysis of Sample 311-U1326C-10X-1, 145–150 cm. † = calculated based on the total amount of C1 released during the degassing experiment and the pore water volume recovered by the PCS. ‡ = methane saturation from Table T18.
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