04.00.00 Geological-mineralogical sciences
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04.00.00 Geological-mineralogical sciences
Description
The dynamics of changes in the species diversity of radiolarians during the last 150 million years with accuracy to one geological century was determined. The basic patterns of species and taxa of high rank change had been established for the boundary between Cretaceous and Paleogene. There were revealed topomorphic features of bipolar species, which have succeeded from the Cretaceous into the Paleogene and became ancestors of Cenozoic radiolarian fauna. Changes in the species number in the boundary between Cretaceous and Paleogene periods, and also significant variations in the species diversity in Paleocene and Eocene are connected to a combination of a number of factors. The most important of those factors are geological processes, causing extensive transgressions and regressions, climate variability, the overall evolution direction of the Earth biota and competition for important chemical components for the Radiolaria’s livelihood. The emergence of powerful tropical forests on the land with their huge bio-production and bio-chemical erosion is connected to late Cretaceous era. This resulted increasing of the dissolved material proceeding into the sedimentation pool, what is confirmed by classical bauxites emergence. Because aluminium oxide and silicon oxide are geochemically connected, we can state as well about increasing of dissolved silica flow initiated development of Diatoms, which became competitors to Radiolaria in their battle for silica. The last ones are lost this battle, what caused the species decreasing. That was not a catastrophic event with immediate extinction, but a long process
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THE FILTRATION PROPERTIES FEATURES OF TECHNOGENIC DEPOSITS
04.00.00 Geological-mineralogical sciences
Description
The studies of synthetic sand deposits formed after working dredges deposits in river valleys, have established significant heterogeneity of filtration properties of elementary layers of sand of different grain size distribution. The features of the structure of the array of man-made structures provide a large capacity of absorption of suspended clay particles and the conditions for water purification by adsorption
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04.00.00 Geological-mineralogical sciences
Description
This article discusses results of hydrogeological study including morphometric terrain analysis of irrigation systems of Syrt Plain. The author of this article tries to prove that irrigation of chestnut soil in Syrt Plain can be achieved without employing regular drainage systems by citing the example of long-term irrigation system employed by experimental station in the town of Ershov
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PHYSICAL AND MECHANICAL PROPERTIES OF GYPSUM AND GEOTECHNICAL CONDITIONS OF DEPOSIT BOGOMOLOVSKOYE
04.00.00 Geological-mineralogical sciences
Description
The article presents the evaluation of geotechnical conditions of gypsum Bogomolovskoye deposit, the Perm Region. It is shown, that the main influence on the conditions of the development of the field will have surface and underground karst
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EFFECT OF RECREATIONAL LOAD ON SOIL RESERVE “UTRISH”
04.00.00 Geological-mineralogical sciences
Description
The original soils were investigated at the Black Sea coast of Russia. Severe degradation of the soil in a Utrish nation reserve were identified as a result of high recreational pressure. Soils with high recreational load have low humus content (2-3 times) and a lower en-zymatic activity than the control of the soil. Biological parameters can be successfully used for environmental monitoring of soil of Utrish reserve, in contrast to the chemical and physic-chemical properties
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CHANGE OF BIOLOGICAL ACTIVITY OF SOILS OF NORTH CAUCASUS IN RELATION TO CLIMATE
04.00.00 Geological-mineralogical sciences
Description
Climatic conditions have considerable impact on biological properties of soils of the South of Russia. From all studied indicators the most dependent on climate there was maintenance of a humus and activity of polyphenoloxidases and peroxidases. Values of the integrated indicator of a biological condition (IIBC) on a profile of soils decrease in process of increase in an amount of precipitation, decrease in temperature, and increase in height of the district in next order: meadow subalpine → brown forest → gray forest → black leached soil → black typical soil → black ordinary soi
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04.00.00 Geological-mineralogical sciences
Description
In West Karelia (Severny Prigranichny locality), an extension of the Hattu greenstone belt (Finland) was traced and diorite-tonalite and granodiorite complexes, similar in petrochemical characteristics to the Kuittila and Viluvaara complexes, and near-N-S-trending shear-zones, favourable for gold concentration, were revealed. Gold is most likely to occur in Kadilampi-type massives, in schistosity and silicification zones in them and in their haloes. Gold ore occurrences and mineralization points, such as Kadilampi, Kuslokki, Gornoye, Soluha, Kappala and some others, were located
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EXPERIMENTAL RESEARCH AND MODELING OF PACLOBUTRAZOL MIGRATION IN SOIL
04.00.00 Geological-mineralogical sciences
Description
In this study, we have investigated the migration of paclobutrazol in the sod-podzolics soils. The migration of pesticide was restricted with 5 cm in the field study. Paclobutrazol was found in 11 days after application in the lysimeter’s water samples, though the pesticide is moderately mobile. The lysimeter study showed that the risk of ground water contamination would exist if application of paclobutrazol was on the sod-podzolics medium loamy soils. The modeling by PEARL 4.4.4 and MACRO 5.2 simulated the migration of paclobutrazol until 18 cm in the soil. MACRO was able to predict the leaching of pesticide. The simulated paclobutrazol losses by leaching were consistently lower than the observed
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REGIONAL FACTORS IN FORMING THE ENGINEERING AND GEOLOGICAL CONDITIONS OF THE PERM REGION
04.00.00 Geological-mineralogical sciences
Description
The article summarizes the main factors of regional engineering and geological conditions, and the results of zoning on the basis formation analysis and classification of engineering-geological conditions in the Perm region
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QUALITY ASSESSMENT AND RESERVES ESTIMATE OF GYPSUM DEPOSIT OF SHVALEVSKY LOG (PERM REGION)
04.00.00 Geological-mineralogical sciences
Description
In this article we have analyzed the geological structure of the deposit; thickness of stripping soils, ore, sub-standard layers and cavernous rocks were estimated, made estimation of reserves and given the qualitative characteristics of the ore
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