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IODP Expedition 330 Louisville Seamount Trail

Daily Science Report 53 -- Wednesday, 2 February 2011


Site U1376 on Guyot 32.3°S 32° 12' 59.4" S, 171° 52' 50.4012" W
Louisville Seamount Trail
0 m above sea level

Cores U1376A-20R to -23R (148.1-182.8 mbsf) were retrieved with 73% recovery. The succession continues downhole with heterolithic breccia in a hyaloclastic matrix. Both matrix and clasts are highly olivine-phyric with up to cm-size olivine crystals of variable preservation stage (fresh to altered). As in the cores above, fresh volcanic glass is abundant and can be found both in the matrix and in some of the clasts. In the lower part of Core U1376A-22R another aphyric dike was encountered that seems to continue into Core -23R (detailed description ongoing). In the late afternoon, the allocated coring time for this site was expended and the hole was prepared for logging. The series of site meetings for U1376 was opened with presentations by the Sedimentology and Paleontology lab groups.