TO: Tom Davies
FM: Jay Miller
JA Daily Science Report for Expedition 305, 6 February 2005.
SCIENCE UPDATE: Cores 305-U1309D-189R to -193R (919.0 to 938.2 mbsf, 93% recovery) are medium-to coarse-grained olivine gabbro to coarse-grained troctolitic gabbro in the upper part of the cored interval. Below the olivine-rich gabbro, the sequence returns to subtlely modally and texturally heterogeneous gabbro, with thin intervals of pegmatitic gabbro and disseminated oxide-bearing gabbro. Alteration is low and evidence of deformation is rare.