Abstract:

The data of pitting, geoelectrical prospecting and temperature measuring, as well as analysis on ice (water) content and saltness indicated that the permafrost table of Astrofix Hilltop of Fildes Peninsula is 1. 5m depth, and the table can rise (or descend) 0.3-0.5m with altitude rising (or descending) 10m based on the hilltop. Frost table of stone circle has a bowl-shape of concave center. Cryosphere of continent-sea-ice-rock has a structure of five layers, namely, active layer, frost sand-gravel layer, frost volcanic rock permeated by sea water, frost volcanic rock unpermeated by sea water and unfrost ancient continental base. Thickness of permafrost is about 80 to 150m, and it showed an existence of offshore (subsea) permafrost. In the place of high salt content, the electrical resistivity of the permafrost can lowly reach to 800m, meanwhile, the periglacio-geomorphic development are limited (e.g. widespread stone circle, sorted polygon and nets in the region).