TO: Tom Davies

FM: Jay Miller


JA Daily Science Report for Expedition 304, 29 November 2004.


LOCATION:  Site U1309 (prospectus site AMFW-01A)

Latitude: 30° 10.1086'N     Longitude: 42° 07.1115'W    
Water depth: 1642 mbsl


SCIENCE UPDATE: Cores 304-U1309B-14R to -20R (71.1 to101.8 mbsf, 67% recovery, 46% recovery for hole) are moderately altered diabase and olivine gabbro. Centimeter scale compositional layering in gabbroic rocks dipping at ~45° in the core reference frame is common in the lower part of the section. No evidence of plastic deformation has been described in the interval below the serpentinized peridotite at ~57 mbsf. Visual estimates indicate alteration is somewhat less pervasive in the lower part of the section as compared to the upper part. Hole U1309B was terminated at 101.8 mbsf when the bit would not rotate in the bottom of the hole.