TO: Tom Davies

FM: Jay Miller


JA Daily Science Report for Expedition 304, 28 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-9R to -13R (47.5-71.1 mbsf, 50% recovery, average 37% recovery for hole) are moderately to pervasively altered gabbro, with an intrusive contact against serpentinized peridotite in the lower part of Core U1309-11R (>57 mbsf). Below the serpentinized peridotite is more fine- to medium-grained diabase (lower contact between peridotite and diabase not recovered). The effects of both high and low temperature alteration have been recognized, however high temperature deformation features are rare. Many intrusive contacts logged are at a high angle in the core reference frame.