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IODP Expedition 330 Louisville Seamount Trail

Daily Science Report 35 -- Saturday, 15 January 2011


Site U1374 on 28.6°S Guyot 28° 35' 44.9988" S, 173° 22' 49.8" W
Louisville Seamount Trail
0 m above sea level

Cores U1347A-52R to -58R (335.9-402.8 mbsf) were retrieved with 86% recovery and 3.5 m/hr penetration rate and continued to deliver mainly volcaniclastic breccia. However, the character of the breccia has changed to greenish-gray, finer, and more homogenous material. In addition, the number and thickness of intercalated volcanic units increased; Cores U1347A-52R, -55R and - 58R contain thick lava flows (~4 m,  ~3 m and ~1m recovered respectively). Although the bit has reached 93 hours of rotation at the end of today, penetration rate and recovery are still record-breaking. Staff and scientists are preparing for the first large sampling party (for personal, post-expedition research) scheduled for the next 2 days.