Geology

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Composition and Structure of the Ventriculitidae (Porifera, Hexactinellida) Family

The Ventriculitidae representatives used to hold noticeable and occasionally dominant position within the Coniacian – Maastrichtian sponge assemblages. Relatively simple skeleton construction in the representatives of the family among the Late Cretaceous hexactinellids has made it possible to trace variations in skeleton morphology, changes in the goblet habitus and in the structure of irrigation system depending on the width variations of the skeleton-building wall.

Concentration of Mobile Forms of Heavy Metals in Soils in the Territory of Trophimovsk Oil Field (Saratov Region)

Authors: Reshetnikov M. V., Majeed D., Shkodin S. D., Iudin N. B., Dobrolubov A. I.

The soil cover on the territory of the Trofimov oil field located within the city of Saratov has been studied. Based on the results of analysis of concentrations of mobile forms of heavy metals, an assessment of the modern sanitary-hygienic and ecological-geochemical state of soils was performed. Significant correlations between different metals have been found. An excess of the maximum permissible concentrations for nickel and copper has been established.

Geochemical Data on Lower-Taiga Ore Cluster (Primorye) and Zonation of Multimetal Mineralization

Authors: Medvedev E. I., Ivin V. V., Fat`ynov I. I.

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.

Lithological and Petrophysical Modeling of Oil and Gas Reservoirs of Carbonate Deposits (on the Example of the Severo-Limanskoye Oil Field)

Authors: Golovin B. A., Golovin K. B., Kalinnikova M. V.

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.

Peculiarities of Formation of Anthropogenic Hydrochemical Anomalies in Groundwater within the Oil and Gas Fields

Authors: Yanochkin V. V., Moskovsky G. A., Reshetnikov M. V., Eremin V. N.

During long-term operation of oil and gas fields in the groundwater on their territory are formed hydrogeochemical anomalies expressed primarily chlorellaman type chemical composition, typical of the zone of active water exchange. The formation of the chemical composition of groundwater is influenced by many factors, both natural and manmade.

The Research Results of the Physical Properties of Soil in the Village Piterka and Their Ecological Importance

Authors: Reshetnikov M. V., Paltsev I. S., Kuznecov V. V.

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.

Sanitary Condition of the Gully System and the Problem of the Organization of Runoff from the City Territory of Saratov in the Late XIX Century

Authors: Sheshnev A. S., Kovalev M. V.

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.

Upper Cretaceous Deposits and Biostratigraphy of the «Novospasskoe» Section (South-West of the Ulyanovsk Region)

Authors: Seltzer V. B., Kalyakin E. A., Ilinskiy E. I.

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.

Noble, Scattered and Colored Metals in the Combustible Schists of the Volzhsky Shale Basin

Authors: Samoilov A. G., Zozyrev N. Y., Shelepov D. A.

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.

Ichthyofauna from the Key Sections of the Middle and Upper Permian of Eastern Europe: Complexes and Zonal Scale. Paper 1: Basin of the Severnaya Dvina River

Authors: Minikh A. V., Minikh M. G.

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.

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