Sediment Trapping

Four strings of three single traps were deployed for approximately 56 days at various sites in Granite Harbour. The trap design and deployment is outlined in Pyne (1984).

The string from the deepest sink proved impossible to recover. However, all other traps had measurable quantities of mainly biogenic material. Samples were preserved in alcohol and will be analysed for biogenic silica, organic carbon and sedimentation rate.

In addition, S.216 from Rice University, Texas, deployed a string of seven traps immediately east of Granite Harbour. Logistic support was provided by K.042 as part of a co-operative programme. The Rice University party have analysed some of the sediment trapped from Granite Harbour in 1983-84.