Effect of lateral advection on sedimentary climate archives - high-resolution records from the last Deglacial to Holocene North Atlantic drift deposits

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This project will elaborate an integrated, multi-parameter millennial-scale record of Deglacial-Holocene drift sediments in the North Atlantic at ODP Sites 980 (Feni Drift) and 984 (Björn Drift) using sedimentological data and supplementary information from clay mineralogy, micropaleontology, and organic geochemistry. Sediment grain-sizes as the central issue will provide detailed information on the current strength variability over the past 20,000 years, after ice-rafted bias is filtered from the record. The clay mineral assemblage will identify potential source areas for fine-grained material. The composition of the coccolith assemblage gives indications for changes of surface hydrology and productivity and supply of re-distributed pre-Quaternary species. Organic carbon and isotopic studies will reveal possible offset between composition and radiocarbon ages of carbonate and organic matter in the fine fraction relative to properties of the bulk sediment. The integration of the sub-disciplines will demonstrate the variable impact of lateral sediment displacement by current action on the interpretation of palaeoclimatic records.