TO: Tom Davies
FM: Jay Miller
JA Daily Science Report for Expedition 304, 30 December 2004.
LOCATION: Site U1309 (prospectus site AMFW-01A)
Latitude: 30° 10.1195'N Longitude: 42° 07.1311'W
Water depth: 1645 mbsl
SCIENCE UPDATE: Cores U1309D-74R to -78R (377.2 to 401.2 mbsf, 87% recovery, 64% average recovery for hole). These cores are a complex series of predominantly olivine-bearing and olivine gabbros. In the upper part of the cored interval, medium-coarse grained olivine gabbros have sutured igneous contacts with thin (10 cm to a few tens of cm thick) intervals of coarser grained, olivine-bearing to olivine-poor gabbros and oxide gabbros. Olivine abundance generally increases down section; the last few cored intervals are medium-coarse grained olivine gabbro. Evidence of deformation is rare, and alteration intensity appears to decrease down section.