pdf № 270, June

DOI: 10.19110/2221-1381-2017-6-3-12

The geological situation of bitumen manifestations in the Devonian andesite basalts lavas in the Minusinsk intermountain trough has been characterized. The features of chemical and molecular compositions, X-ray diffraction, spectroscopic, thermal and isotope-geochemical properties of natural bitumen are discussed. A conclusion is made about the important role of solid migratory bitumens for forecasting for regional oil and gas potential.

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DOI: 10.19110/2221-1381-2017-6-13-19

The PT parameters of metamorphism of Upper Proterozoic deposits of the Nyarovey series of the Polar Urals were estimated for the first time on the basis of mineralogical geothermometers. Among the rocks of the Nyarovey series, two main groups of rocks are distinguished: quartz-epidote-chlorite-actinolite rocks (metabasalts) and micaceous-quartz schists (metapelites). The mineralogical analysis showed that the metabasalts are composed of the following rock-forming minerals — quartz, chlorite, albite, muscovite, amphibole, fluorapatite, epidote and accessory — zircon, titanite, rutile, magnetite, pyrite, chalcopyrite, galena. In the metapelites — quartz, chlorite, albite, muscovite, biotite, potassium feldspar, calcite, fluorapatite, epidote, allanite; accessory and ore — zircon, apatite, garnet, titanite, rutile, tourmaline, ilmenite, magnetite, sphalerite, pyrite, chalcopyrite. When calculating geothermometric parameters, a plagioclase-amphibole geothermometer for metabasites and a muscovite geothermometer for metapelites were used. Our estimation of pressure and temperature values in the metabasites and metapelites did not reveal any strong differences. It was established that the values of temperature and pressure were within 350—500 °C and 3—5 Kbar. At the same time, the temperature range turned out to be higher than assumed in previous studies. The metamorphic rocks of the Nyarovey series were formed under the conditions of the epidote-muscovite-chlorite subfacies of the greenschist facies and the lower part of the epidote-amphibolite facies, under medium and elevated temperatures and low pressures.

Keywords: Upper Proterozoic deposits, metamorphism, geothermometers.

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DOI: 10.19110/2221-1381-2017-6-20-26

The environment cannot completely absorb the technogenic physical fields energy that is abundant in conditions of an intensive urbanization level growth. Natural geoecological conditions are disrupted. Syktyvkar city was chosen as a research area. Our researches by vibroseis survey method determined areas most proned to increasing vibroseis amplitudes in building foundation soil in restrained urban conditions using geological and hydrogeological data.

Keywords: geological environment, vibroseis survey, deformation processes.

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DOI: 10.19110/2221-1381-2017-6-27-31

The results of a morphometric analysis of the southwestern Timan region relief on the example of the Vymsko-Visher interfluves have been presented in the paper. Within the Tract-Sindor section of the main gas pipeline the Tract and Sindor morphostructural blocks have been identified, for which a predictive ecological-geological assessment of the geological environment stability is given. It is shown that the degree of seismic vulnerability of the main gas pipeline is higher when it crosses Sindor area, while for the Tract area the risk of emergencies is associated with the activation of geomechanical processes caused by suffosion and solfluffic processes. The data obtained increase the efficiency of the forces and assets use in the safe ensuring of gas trunkline operation in regions of geodynamically unstable structures.

Keywords: relief morphometry, geodynamic instability, neotectonics, main gas pipeline, geological environment, gas pipeline accidents.

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DOI: 10.19110/2221-1381-2017-6-32-39

By the example of Devonian terrigenous sediments with a high content of chamosite the correctness of the carbonate analysis results is considered. Comparison of results of researches of mineral and chemical composition is given by various methods, mathematical (statistical) data processing is executed. It is established that almost all magnesium and an essential part of iron occur from soluble silicates while processing HCl.

Keywords: Middle Timan, Devonian sediments, analyses of carbonates, chamosite.

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DOI: 10.19110/2221-1381-2017-6-40-42

Sorbents, proposed by the world industry to solve environmental problems, are not efficient enough for many technological parameters (selectivity, stability, etc.). It is necessary to search for mechanisms of increasing productivity of the sorption products. A new trend in the algorithm of modeling mineral-based materials is the isolation of strains and the development of new compounds that can improve their physical and chemical parameters. The objects of the research were Ionsorb™ glauconite and immobilized strains of Pseudomonas yamanorum VKM B-3033D bacteria. We constructed a biosorbent and evaluated its sorption and destructive properties. The efficiency of purification from oil products with the help of the developed biosorbent in water reached 19 % within 7 days, in ground 30 % within 90 days.

Keywords: glauconite, biosorbent, adsorption, destruction, oil contaminated water, oil contaminated soil, railway bed, bacterial strain.

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