Вестник Кольского научного центра РАН. 2014, №2.

subsidence of the Kandalaksha graben to about 150 m and the formation of the Kolvitsa graben. The crystalline rocks surrounding Kandalaksha bay were involved in the subsidence that is reflected in the isobase curve of the glacioisostatic uplift of the area. The combined impact of the tectonic component and the glacioisostatic uplift led to a rise in tensions whose discharge caused a high seismic activity of the Kandalaksha graben and its environs. Keywords: Belomorskaya basin, Kandalaksha graben, Kolvitsa graben, earthquake, paleoseism ic dislocation, Holocene. P.V. Amosov, N.V. Novozhilova INFLUENCE OF PERMAFROST POROSITY ON THAWING DEPTH The analysis results of numerical modelling are presented on influence of permafrost porosity on thawing depth for underground locations of small reactor unit module. Monotone quadratic decrease has been shown for thawing depth with increasing rock porosity. Keywords: permafrost, porosity, thawing. A.S. Opalev, M.S. Khokhulya, V.V. Biryukov ENERGY-RESOURCE-SAVING TECHNOLOGY TO PRODUCE MAGNETITE-HEMATITE CONCENTRATE OF IRON QUARTZITES FROM THE DEPOSITS GROUP IN ZAIMANDRA REGION A combined technology was developed to produce magnetite-hematite concentrate of iron quartzites processed by JSC “Olcon”. The technology includes magnetic-gravity separation with the use of fine screening and gravity separation of middlings of the main magnetic separation. This technology considers material features of the processed ores, distinctions in their physical-mechanical properties, liberation of ore minerals and provides reduction in energy consumption for 20%, end-to-end growth of iron recovery for 13%, increase in output of hematite concentrate for more than 15% together with simultaneous reduction in stored tailings capacity. The development is patentable. Patent decision for the invention was awarded. Keywords: ferrous quartzite, magnetic-gravity separation, g ravity separation, magnetite, hematite, quartz, concentrate, tailings, concentration, recovery. V.F. Skorokhodov, R.M. Nikitin, A.S. Stepannikova IMPROVEMENT OF TECHNOLOGY TO EXTRACT NEPHELINE CONCENTRATE The paper briefly presents some results of researches aimed at developing flotation techniques in activated water dispersions of air (AWDA) and ensuring of maximal area for gas-liquid interface in the flotation compressed gas machine. Keywords: AWDA, pulp aeration, nepheline concentrate, flotation. V.T. Kalinnikov, I.P. Kremenetskaya, L.A. Ivanova, M.V. Slukovskaya, T.T. Gorbacheva, S.A. Alekseeva, V.V. Laschuk, S.V. Drogobuzhskaya ADAPTIVE TECHNOLOGIES FOR CREATION OF ARTIFICIAL PHYTOCENOSES IN TECHNOGENICALLY DISTURBED SUBARCTIC AREAS CONTAMINATED WITH HEAVY METALS The results of a long-term study of the performance of ameliorants made of mining wastes containing acid-neutralizing minerals are presented. The ameliorants were applied to improve the vegetative cover on the area affected by a copper-nickel smelter located on the Kola Peninsula. It is shown that spreading of a screening layer of ameliorants over contaminated soil can speed up remediation. The layer creates a favorable environment for growth of continuously stable plant communities by improving the soil pH, diminishing the heavy metals mobility, and increasing the macroelements pool available to plants. The characteristics of artificial phytocenoses created by innovative express biotechnologies, exclusively based on ameliorants, without recourse to scarce peat-soil mixes, suggest the onset of secondary succession. Keywords: biological remediation, secondary succession, grass, ameliorants, contam inated soil, heavy metals, phytocenose. A.I. Nikolaev, L.G. Gerasimova, M.V. Maslova NEW SORBENTS FROM THE WASTE OF JSC “ APATIT” FOR RADIONUCLIDES AND TOXICANTS DECONTAMINATION Chemical technology and mining enterprises, as well as civil and military organizations, which use radioactive materials, are sources of the environmental pollution. Storage of the generated wastes in dumps and special burial places produces serious environmental problems for normal life, in Arctic regions especially. The authors have developed an innovative technology to process industrial wastes of JSC "Apatite" with producing new effective sorption materials. The technology can make a significant contribution 149