TO: Tom Davies
FM: Jay Miller
JA Daily Science Report for Expedition 305, 17 January 2005.
SCIENCE UPDATE: Cores 305-U1309D-79G to 85R (401.3 to 429.4 mbsf, 80.4% recovery) continued in the slightly to moderately altered, medium coarse grained olivine gabbro recovered as Expedition 304 concluded. Olivine gabbro dominates the cored section, with intervals of coarse grained to pegmatitic gabbro, oxide gabbro, and olivine-bearing gabbro. A ~1 m thick epidote-rich band bisects one of these coarse grained gabbroic intervals. Deformation is rare and localized, and alteration while moderate to intense near veins, is slight to moderate elsewhere.