Introduction and Background

This programme is a continuation of our study of modern sediment in the McMurdo Sound region. We have collected over 80 seafloor samples and cores since 1980 which have been analysed and preliminary interpretations published (Barrett et al., 1983). Several questions remain unanswered about modern sedimentation processes on the floor of McMurdo Sound. We intended this season to attempt a programme of underwater photography, but realized the camera electronic componentry might not be completed in time this season's operation and informed Antarctic Division. A revised programme was proposed which would expand an accompanying sampling programme at the Ferrar Glacier snout (Fig. 1). The aim of this programme was to study the modern sedimentation regime at the snout for comparison with the upper sediments cored in the CIROS 2 hole (Barrett et al., 1985). CIROS 2 cored sands, and laminated muds for which we have yet to identify a modern example in the area.

Another aspect of the programme was to recover two sediment trap moorings on the Ferrar and Mackay Glaciers (Fig. 1) set by USARP party S-216 (Dr R. Dunbar) in cooperation with the VUW programme last season. S-216 was not funded for this season so K042 intended to recover and redeploy the moorings.

Preparation and inventory for the CIROS science programme was also carried out in anticipation of drilling in 1986.