Izvestiya of Saratov University.
ISSN 1819-7663 (Print)
ISSN 2542-1921 (Online)


Геология

Kinematics of the Electromagnetic Waves from the Second-type Seismoelectric Effect in Two-layered Earth

Analysis of the traveltime curves of the principal types of the electromagnetic waves from the second-type seismoelectric effect was used to demonstrate the possibility of using the kinematic characteristics of that effect fields for studying aquifer locations. 

Geological-tectonic interpretation of gravity-magnetic information in development of regional geophysical profiles (for example: the profile «Uvarovo – Svobodniy»)

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. 

Compaarative Analysis of the Thinly Dispersed Components of the Triassic and Jurassic Sediments from the Caspian Region Aimed at Revelation of the Paleogeografic Settings

Indicators of sedimentogenesis have been established for paleogeographic reconstructions based on ecosystem-nanostructural analysis of finely dispersed sediments. The Early Triassic Olenekian sediments have disclosed some features of primary food chains peculiar for marine basins within the landscapes previously regarded as continental ones. Those have been classified as plains periodically flooded by sea. The coccolith- and ostracod-bearing sediments from epicontinental basins have been recorded in the Middle Triassic sections.

Hydrogeodynamic Conditions of the Basic Oil-gas-waterbearing Complexes of the Volga-Ural Province

Leaded researches showed, what hydrogeodynamic conditions of basic oil-gas-water-bearing complexes of Volga-Ural province are favorable for preservation of deposits of hydrocarbons. 

Geological Museum – a historical Component of the Saratov State University

Private collections of rocks and minerals from the vast of the Ural Mountains and Kirghiz plains known in Saratov from the second half of the XIX century, by the beginning of the XX century have been concentrated in the vaults of Radishchev Fine Art Museum. Later on, some of them joined the collections of the geological cabinet at the Saratov State University.

Lithologic-petrophysic Characteristic of Ardatovsk Horizon’s productive Collectors of the Splavnukha’s oil Field

In this article we had proved criteria of definition of productive collector’s effective thicknesses, porosity, shaliness and petrosaturation. We had revealed their features of vertical and lateral distribution. 

Petromagnetic Effect of an unsoluble residue distribution in the sylvinite Layer Section of the Gremyachinskoe Deposit

The article presents results of the detailed petromagnetic analysis of the core samples of the potassium salts of the Kungurian potassium salt complex in the Gremyachinskoe deposit (Volgograd region), which allowed for obtaining additional information on the stratigraphic rhythmicity and for substantiating the correlation levels.

Demonstration of Gemmation among Cretaceous Skeletal Sponges – Hexactinellida

The examination of the modular organization in fossil skeletal sponges (Hexactinellida) is mainly related to a study of their vegetative reproduction. The concepts of the reproductive forms for both Recent and Mesozoic hexactinellids can be ambiguous. Examples of the skeletons of fossil sponges from the Late Cretaceous of the Volga River basin, with morphologically detached and naturally distributed sprouts interpreted as buds, are shown. 

Results of the geochemical snow Survey for a local Area of the Territory of the Saratov City

Results of the chemical snow survey for a local area of the territory of the Saratov city are presented. It is fixed that composition of water from melted snow is corresponding to water qualitative for fish farming, except of content of nitrogen ammonium. Conclusions on perspectives of snow survey of local areas are proposed. Similar works has an important role in educational process of students, studying ecological disciplines. 

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

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.

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