Table T19. Mass balance calculations based on degassing experiments, Site U1329.
| Core | Depth (mbsf) |
Total C1 released (10-3 mole) |
C1 concentration (mM) |
In situ nondissolved C1 as percentage of pore volume if present as |
||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Total | At laboratory conditions | In situ | ||||||||
| Top | Bottom | Dissolved* | Free† | Dissolved‡ | Nondissolved | Free gas | Gas hydrate | |||
| 311-U1329C- | ||||||||||
| 7P | 55.6 | 56.6 | 50 | 69 | 2.4 | 67 | 65.4 | 4 | <0.1 | 0.1 |
| 23P | 188.5 | 189.5 | 152 | 236 | 3.7 | 232 | 118.5 | 117 | 2.5 | 1.6 |
| 311-U1329E- | ||||||||||
| 7P | 73.5 | 74.5 | 60 | 76 | 2.2 | 74 | 73.2 | 3 | <0.1 | <0.1 |
| 10P | 125.0 | 126.0 | 71 | 92 | 2.7 | 89 | 92 | 0 | 0 | 0 |
Notes: * = extrapolated from HS analysis of adjacent APC and XCB cores (Table T15). † = calculated based on the total amount of C1 released during the degassing experiment and the pore water volume recovered by the PCS. ‡ = methane saturation of pore water (Table T16) except for Core 311-U1329E-10P where pore water is under saturated (in situ methane saturation is 106.3 mM).
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