Among the perennially frozen lakes of the Dry Valleys of South Victoria Land (Antarctica), some are dry-based, i.e. frozen to the bottom. One of these is studied here by a multiparametric investigation (isotopic composition in D and 18O, ions, gas and ice texture analyses). A sediment layer about 10 cm thick appearing at a depth of 3·5 m is also studied by grain size, X-ray diffraction and scanning electron microscope analyses. The information retrieved indicates that this ice-block lake results from a build-up in two steps and explains how aeolian sediments were included as a layer into the ice.
Keywords lake ice; aeolian sediments; stable isotopes; dry valleys; Antarctica
Sleewaegen, S., Lorrain, R., Offer, Z., Azmon, E., Fitzsimons, S. and Souchez, R. 2002. Trapping of aeolian sediments and build-up of the ice cover of a dry-based antarctic lake. Earth Surface Processes and Landforms 27 (3), 307-315. [PDF 1079kb] doi:10.1002/esp.320
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