Ninth International Conference on Permafrost ... - IARC Research

Ni n t h In t e r n at i o n a l Co n f e r e n c e o n Pe r m a f r o s tFigure 5. Model of frozen soils condition (Yamal).against ω, or ρ ωagainst ω, can be displayed at the receivertool screen. For an interpretive translation of the FS data, theEM – 1D programme carrying out 1D inverting ρ kagainst ωinto simulated resistivity (developed by P. Pushkaryov) wasused. The TEM sounding the combine device with squareloops sized 20 x 20 (a generator antenna) and 10 x 10 (areceiving antenna) was applied. As a result, it was possibleto explore the cut in details to the bottom of 30 m and tosolve set tasks.According to VES data about lithology structure, themaintenance of ice, temperature, and salinity have beenobtained (Fig. 4).According to FS data about position, frozen soil under abeach, a lagoon, and the first sea terrace have been obtained(Fig. 5).According to TEM, data about deeper borders of thawedand frozen rocks have been obtained (Fig. 4).The main features of the described methods are asfollows:VES – ability to split the upper part of the cut upon itsresistance. But some difficulties are caused due to thepresence of a high-resistivity screen (icy subsoil).FS – ability to map conducting zones (cryopegs);demonstrates the high production, but it is insensitive to thehigh meanings of resistance.TEM – ability of depth research.ReferencesZykov, Ju.–М. 2007. Geophysical Methods of PermafrostStudies. Moscow: Publishing house of the MoscowState University, 272 pp. (in Russian).Zykov, Ju.D., Buldovich, S., Koshurnikov, A.V. et al.2007. Opportunity of electromagnetic soundingat geoсryology mapping. In: Materials of theinternational conference “Cryogenic Resources ofPolar Regions” II, Salekhard, 2007: 149 pp.146