Alan Gelatt (Exp. 309)
Jon Rice (Exp. 301)

Expedition 301

Cruise Objectives
Scientific Prospectus


Week 8: Aug 12 - Aug 20
Week 7: Aug 05 - Aug 11
Week 6: July 29 - Aug 04
Week 5: July 22 - July 28
Week 4: July 15 - July 21
Week 3: July 07 - July 14
Week 2: July 02 - July 06
Week 1: June 25 - July 01

21 July 2004

We are very close to getting core now. Last night, the operations at Hole 1301A were completed and the ship was moved to Hole 1301B. Most of the day was spent drilling out the cement placed in the hole before we moved away from the location the first time, and cleaning the hole. Just before I went to bed we were tripping down with a 9 7/8-inch rotary core barrel (RCB) bit. We expect to have core on deck by early tomorrow morning.

Here is a partial update for today given by Adam Klaus, Expedition Project Manager/IODP-USIO Staff Scientist (USA):
We're back at HOLE 1301B.

When I woke up this morning, we were already drilling away at the cement near the bottom of the 10 3/4 inch casing. The end of the casing is at 3013.95 mbrf (346.11 mbsf; 79.61 m into basement) and the bit encountered >10 m of cement inside the bottom of the casing. We are drilling this out now with the 9 7/8 inch drill bit and then we'll clean out any debris in the previously drilled 14 3/4 inch rat-hole which extends to 3018.00 mbrf (350.16 mbsf; 85 m into basement). We will then drill ~1m more (~3019 mbrf; 351.16 mbsf) to make a nice pilot hole to start RCB coring in.

ETA....CORE-ON-DECK.... very late tonight? Early tomorrow? This all depends on how the rest of the drilling and cleaning goes.

[mbrf = meters below rig floor; mbsf = meters below seafloor]
BEAUTIFUL MORNING FOR DRILLING. This morning we drilled through the cement at the bottom of the 10 3/4-inch casing. Late tonight, the drillers will trip in with the 9 7/8-inch rotary core barrel (RCB) bit and, FINALLY, begin drilling core from the basement.
This is the 9 7/8-inch rotary core barrel (RCB) bit that will be used to drill through the basement basalts and collect core.
ROTARY CORE BARREL (RCB) BIT#2. This is the cutting end of the 9 7/8-inch rotary core barrel (RCB) bit. As it drills through the basement basalt, it will chew away all of the rock except a central core that moves into the central core barrel as the bit moves down through the rock. During coring operations, there will be a “core catcher” inside the center of the drill string right above the bit. The core catcher has “teeth” that let the core samples move in - but not out - of the drill string, and it is attached to a 9.5-m long “core barrel” with a “core liner” inside. After 4.5 to 9 meters of drilling, a sinker bar is dropped down the drill string. It attaches to the top of the core barrel and it is pulled up to the surface. The core barrel is placed on the rig floor and the core liner with the core inside is then retrieved. At that point we hear, “CORE ON DECK!”
LAB CHECKS. Since we are expecting samples tomorrow, many of the labs are doing last minute checks. Trevor and Juri are in the Paleomagnetics Laboratory checking the cooling system for the cryogenic magnetometer. Shown from left to right are Trevor Cobine, Marine Laboratory Specialist (Australia); Will Sager, Paleomagnetist (USA); and Juri Kotze, Electronics Technician (South Africa).
“GUMBY SUITS.” Takeshi and I got a little “antsy” today so we thought we would do something a little different; we decided to model the Downhole Measurements Laboratory’s cold water survival suits (affectionately known as the “Gumby suits”) for you. Shown from left to right are Takeshi Tsuji, Logging Scientist (Japan); Javier Espinosa, Schlumberger Logging Engineer (Mexico); and Jonathan Rice, Teacher at Sea (USA).
This is our serious side??? Shown are Jonathan Rice, Teacher at Sea (USA), and Takeshi Tsuji, Logging Scientist (Japan).
DON’T TRY THIS AT HOME!!! These suits are hard to put on and even harder to take off. I hope I don’t have to really use one. Although I feel good knowing that we wouldn’t freeze in the cold Pacific, I was far too hot in this.