SOURCES OF CONTINENTAL DUST OVER ANTARCTICA DURING THE LAST GLACIAL CYCLE

The soluble and insoluble parts of 4 major components (Al, Ca, K and Mg) of the continental dust input over East Antarctica, as well as size distribution parameters of the insoluble part of this dust, have been studied along an ice core which spans the last climatic cycle (160 kyr). These results provide a better understanding of the respective impact of the different potential dust sources. While Al and K were probably entrapped in illite originating from arid areas and in a lesser extent from shallow marine sediments, Ca and Mg inputs were dominated by marine carbonate of exposed continental shelves emissions.