Table T5. Monitoring and sampling points in Expedition 327 CORKs. (See table notes.)
|
Monitoring/Sampling purpose
|
Valve ID
|
Screen
material |
Depth
|
Comments
|
|
|---|---|---|---|---|---|
|
mbsf
|
msb
|
||||
| Hole U1362A | |||||
| Pressure | 1 | Stainless steel | 430.1, –3.66 | 194.1 | Deep basement interval |
| Pressure | 2 | Stainless steel | 307.8, –3.96 | 71.8 | Shallow basement interval |
| Pressure | 3 | None | 0.1, –4.26 | NA | Cased interval |
| Geochemistry | 1, 1′ | Stainless steel | 434.2 | 198.2 | Deep basement interval, ~5 m below base of lower packer |
| Geochemistry | 2, 2′ | Stainless steel | 309.3 | 73.3 | Shallow basement interval, ~2 m below base of lower packer |
| Geochemistry | 3, 3′ | Stainless steel | 309.3 | 73.3 | Shallow basement interval, ~2 m below base of lower packer |
| Microbiology | 1, 2 | Titanium | 439.8 | 203.8 | Deep basement interval, ~10.6 m below base of lower packer |
| Hole U1362B | |||||
| Pressure | 1 | Stainless steel | 272.0, –3.66 | 30.0 | Basement interval |
| Pressure | 2 | None | 0.1, –3.96 | NA | Cased interval |
| Pressure | 3 | None | –4.3 | NA | Dedicated seafloor |
| Geochemistry | 1, 1′ | Stainless steel | 278.8 | 36.8 | Basement interval, ~8 m below base of packer, center of 5-1/2 inch casing |
| Geochemistry | 2, 2′ | Stainless steel | 278.8 | 36.8 | Basement interval, ~8 m below base of packer, center of 5-1/2 inch casing |
| Geochemistry | 3, 3′ | Stainless steel | 278.8 | 36.8 | Basement interval, ~8 m below base of packer, center of 5-1/2 inch casing |
| Microbiology | 1, 2 | Titanium | 281.7 | 39.7 | Basement interval, ~10.6 m below base of lower packer |
Notes: Valve ID indicates valve in CORK wellhead. The two microbiology valves in each wellhead are connected to a single sampling line. Geochemical values are also replicated, with two valves monitoring each depth interval. Tubing used for monitoring and sampling terminates in wire-wrapped miniscreens, except for pressure monitoring just below seafloor CORK seal (both CORKs) and dedicated seafloor gauge (Hole U1362B). Depths reported as meters below seafloor (mbsf) and meters subbasement (msb) refer to termination of sampling line. Second pressure values (negative in mbsf column) refer to seafloor monitoring points. NA = not applicable.
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