OPERATIONS

SITE 1075
(Proposed Site LCB-1)


Hole 1075A
Hole 1075A was spudded at 0450 hr on 24 August. The recovery of 1.50 m of sediment established the seafloor depth at 3007.0 m below rig floor (mbrf) by drill pipe measurement (DPM). APC Cores 175-1075A-1H through 22H were taken from 0 to 201.0 mbsf, with 201.0 m cored and 215.2 m recovered (106.3% recovery). Cores were oriented starting with 4H. The drill string was pulled back with the bit clearing the mudline at 2340 hr on 24 August, thereby ending Hole 1075A.

Hole 1075B
The vessel was offset 10 m to the east, and Hole 1075B was spudded at 0040 hr on 25 August. The first core indicated a water depth of 3006.5 mbrf by DPM. APC Cores 175-1075B-1H through 22H were taken from 0 to 204.5 mbsf, with 204.5 m cored and 215.0 m recovered (105.1% recovery). Cores were oriented starting with 4H. The drill string was pulled back with the bit clearing the mudline at 1810 hr on 25 August, ending Hole 1075B.

Hole 1075C
The vessel was offset another 10 m to the east where the third hole of the site was spudded with the APC at 1855 hr on 25 August. The seafloor depth of Hole 1075C was determined at 3006.8 mbrf by DPM. After coring 22 hydraulic piston cores, the hole was terminated after reaching the depth objective of 207.2 m with an overall recovery of 103.0%. Cores were oriented starting with 3H. The bit cleared the seafloor at 1220 hr on 26 August. As the drill string was being pulled out of the hole, the beacon was released and recovered and the hydrophones and thrusters were retracted and secured.


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