GEOCHEMICAL FEATURES OF ARCTIC TUNDRA LANDS CAPES OF THE NOVAYA ZEMLYA EASTERN COAST

The main morphological and physical-chemical characteristics of soils (the mineral and elemental composition, pH, carbon organic matter content and its fractional-group composition, the radiation condition) were investigated in the arctic tundra landscapes of the Novaya Zemlya archipelago. Quartz and feldspars dominate in soils, pedogenetic illite and kaolinite are formed in the acid environment, and medium to high quantity of humus of humate-fulvate composition is typical. Soil-forming rocks of the Abrosimov and Stepovoy bays coasts are enriched in Fe, Ti, Cr, V, Ni, As, and depleted in P, S, Rb, Sr, Ba, Th, Nb and Cl. Plants of the arctic tundra landscapes accumulate S, P, Cl, Sr and Zn. The activity of natural isotopes ( ₂₂₆Ra, ₂₃₂Th, ₄₀K) increases from the vegetation to soils and finally bottom sediments. ₁₃₇Cs activity varies inbetween 10–350, 1–310 and 0–26 Bq kg^-1 in plants, soils and sediments, respectively.

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