Геология

The role of agricultural plants in the migration of Cd, Pb, Ni, and As in the soil-plant system and their contribution to decreasing soil metal toxicosis were studied. The influence of heavy metals and arsenic on the enzyme activity of southern chernozem and the restoration of soil biological activity during the elimination of these elements from planted soil were investigated. 

The article deals with the results of geological interpretation of geophysical data received during traversing («Uvarovo-Svobodny» line, the length is 376 km). Integrated gravitomagnetic installations alongside were applied during the process of interpretation. The new tectonic elements were found, and previously found tectonic elements were confirmed. More accurate information about location of the border separating the mentioned tectonic elements was obtained. 

The proposed new approach to seismic radiation, is based on fixing the amplitude of the displacement vector, reduce them to a system of implicit functions. This allows you to find the functional dependence between the time of arrival of the waves and spatial coordinates. The system of vector equations. The eigenvalues of the matrix in the system are the equations of eikonal. It is shown that for arbitrarily anisotropic and heterogeneous elastic medium, the maximum number of equations eikonal equal to three.

The paper presents new material on ichthyofauna from the key section of the Middle and Upper Permian of the Severnaya Dvina River. Stratigraphic distributions of fish taxa are traced back and significant changes to the fish complexes are proposed. A modified paleoichthyological zonal scheme of the region is proposed as a result.

The Volga shale basin is located in the southeastern part of the East European Platform within the Volga-Urals anteclise and the instrumental zone of the Caspian depression. The sediments of the Volga tier of the Upper Jurassic are sedimentary in the basin. The geological reserves of the Volga shale basin are more than 40 billion tons. Investigations of oil shale revealed the presence in it of significant contents of dispersed and noble metals, rhenium and platinum group metals: palladium, rhodium, iridium, ruthenium.

The section of campanian deposits of the south-west of the Ulyanovsk region characterized by a strata of “knotty” chalk is described. It was found relatively numerous faunal complex presented mostly by belemnites, bivalves and echinoids. The diversity of epibiontic organisms is described. The study of fauna has helped clarify stratigraphic position of the section within the scope of valid regional scheme.

At the end of the 19th century the urban sanitary commission was created for the solution of problems of improvement in the territory of Saratov. In 1890 this commission made the inspection of Glebuchev ravine as zones of sanitary and ecological trouble. By results of researches health officers prepared the analysis of a condition of the territory and the recommendation on the improvement of Saratov. The expressed opinions differed significantly, and reflected the different views on the mechanism of improvement of the sanitary and hygienic situation.

The results of the study of soil in the village Piterka Saratov region. It analyzed the particle size distribution and magnetic susceptibility of soils. The results of particle size analysis can form an idea of the sorption properties of soil, and the results of measurement of the magnetic susceptibility – the transformation of the soil and brings man-made magnetic material.

In this article, a lithologic-petrophysical model of oil and gas bearing carbonate reservoirs of the Severo-Limanskoye oil field is considered. Geological and geophysical characteristics of carbonate reservoirs are determined. A detailed lithologic-stratigraphic description of the marking horizons is given. Geological models of reservoir of the Dankovian-Lebedyanian sediments and the Zavolzhskian-Malevkian sediments of the Severo- Limanskoye oil field are complied.

Currently, the effective use of geochemical research results is hampered by the lack of software and computer support. In this study an attempt was made to process geochemical data on multimetal mineralization of the Lower-Taiga ore cluster (NTRU) on the basis of Matlab mathematical simulation software. The analysis was carried out on more than 5000 samples taken from channel and chip sampling of mine workings, spectral, spectrographic aurometric, assay-activation, atomic absorption and chemical analyses of NTRU.