Daily Report for IODP Expedition 311, October 17, 2005
LOCATION: Site U1325 (CAS-02C)
SCIENCE UPDATE: Hole 1328E was completed at a total depth of 235 mbsf with the successful recovery of a PCS core from the bottom of the hole at pressure. The drill pipe was pulled from the hole and back to a water depth of 1,000 mbrf. The ship was then moved in DP mode 5.5 nmi to Site U1325, which was previously LWD/MWD logged earlier in this expedition. Hole U1325B was spudded with an APC core at 19:10 hr and at a water depth of 2206.2 mbrf. The APC spud core was sampled on the catwalk as a high resolution geochemical and microbiology core. Interstitial fluid analysis of this core indicated a very shallow depth to the sulfate/methane interface (< 2 mbsf). When trying to recover the second APC core from this hole the inner core barrel became stuck near the drill bit and it took several hours to work the core barrel loose. The second APC core contained a relatively large amount of fine sand, which probably contributed to the core recovery problem. By midnight we were planning to run back into the hole with an XCB core barrel to work the hole below the sand section identified in the second APC core.