Table T16. Summary of pressure coring operations at Site U1325.
| Core |
Core-top depth (mbsf) |
Length recovered* (cm) |
Length curated (cm) |
Pressure at core depth (MPa) |
Pressure recovered (MPa) |
Comments | |
|---|---|---|---|---|---|---|---|
| Logged† | Gauge‡ | ||||||
| 311-U1325B- | |||||||
| 11P | 82.4 | 88 | 88 | 22.9 | 0 | — | Pressure lost |
| 17E | 129.9 | 56 | 56 | 23.3 | 0 | — | Core liner broke at core catcher |
| 22Y | 169.4 | 17 | 17 | 23.7 | 0 | — | Valve did not close; sediments washed out of core |
| 26E | 197.4 | 28 | 28 | 24.0 | 0 | — | Deformed liner prevented valve from closing |
| 28P | 206.1 | 46 | 46 | 24.1 | 0 | — | PCS stuck beyond main bit; pipe trip required |
| 311-U1325C- | |||||||
| 5Y | 217.6 | 0 | 0 | 24.2 | 21.7 | 22.0 | Damaged core catcher; water core only |
| 10P | 256.1 | 98 | 96 | 24.6 | 12.4 | 1.5 | Normal operation |
Notes: Water depth at Site U1325 is 2195 mbsl. P = Pressure Core Sampler (PCS), Y = Fugro Percussion Corer (FPC), E = HYACE Rotary Corer (HRC). * = based on X-ray imaging and gamma ray density profiling prior to degassing. † = last pressure recorded before data logger disconnected from corer autoclave. Temperature 2°–4°C unless otherwise noted. ‡ = pressure measured when autoclave pressure transducer connected to computer (PCS cores) or external gauge (PCS, FPC, HRC cores). Pressure measured at 7°C unless otherwise noted.
Previous | Close | Next | Top of page