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IODP Expedition 330 Louisville Seamount Trail

Daily Science Report 37 -- Monday, 17 January 2011


Site U1374 on 28.6°S Guyot 28° 35' 44.9988" S, 173° 16' 46.8012" W
Louisville Seamount Trail
0 m above sea level

Although the drill bit had accumulated 128 hours of rotation, Cores U1374A-65R to -70R (460.3 to 513.1 mbsf) were retrieved with continuing high penetration rate (3.1 m/hr) and sky-high recovery (93%). Whereas Cores U1374A-65R through -67R recovered the familiar brecciated material, Cores -68R, -69R, and -70R contained well-preserved volcanic units with >6 m, <1 m and ~5 m recovered thickness respectively. The recovered contacts between the volcanic units and the breccia indicate that these units represent in situ lava flows, which are much desired for the paleomagnetic investigations. Sampling for personal, post-expedition research of “hard rock” samples continued today with cores from Site U1373.