Table T20. Mass balance calculations based on degassing experiments, Site U1325.
| Core | Depth (mbsf) |
Total C1 released (10–3 mole) |
C1 concentration (mM) |
In situ nondissolved C1 as percentage of pore volume if present as |
Potential pore water freshening caused by gas hydrate decomposition |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Water release (mL) |
Freshening (%) |
|||||||||||
| Total | At laboratory conditions | In situ | ||||||||||
| Top | Bottom | Dissolved* | Free† | Dissolved‡ | Nondissolved | Free gas | Gas hydrate | |||||
| 311-U1325C- | ||||||||||||
| 10P | 256.1 | 257.1 | 110 | 175 | 3.0 | 172 | 143.2 | 32 | 0.3 | 0.4 | 2 | 0.3 |
Notes: * = extrapolated from headspace analysis of Sample 311-U1325C-9X4, 120–123 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 T17.
Previous | Close | Top of page