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Stratigraphic Significance of Gastropod and Improving of Local Stratigraphic Scheme of Sarmatian Deposits of Moldavian Transnistria and Neighboring Areas

In the article it is argued the use of gastropod for stratigraphic subdivisions of Sarmatian deposition. Reasonably allocated typical stratigraphic complexes gastropods for individual horizons sarmatian of Moldavian Transnistria and neighboring areas. Stratigraphy of the sarmatian scheme within the area contains additional, proposed by the author, stratigraphic units in the rank of «layers with gastropod fauna».

Developmental History of Emanation Method and Their Role in Oil Geology at the Present Stage

The key insights in the history emanation method development for search and investigation of minerals are examine, the radiometric methods applied at the present stage for research oil and gas deposits
are quoted, generalization of results emanation survey lead within ore and oil deposits is made, application of the given methods for search and investigation of minerals is proved.

Brine Contribution to Hydrothermal Albitization Concomitant to Productive Reservoir Formation within the Cover (West Siberia)

Corrosion and regeneration types of plagioclase albitization have been determined in a terrigenous complex of productive reservoirs within the cover; this reflects two settings of tectonic-hydrothermal activation in a riftogenic sedimentary basin. Under the pulsating stress conditions (geodynamic anomalies), all plagioclases experience corrosion and, consequently, deanorthitization, with formation of authigenic albite foraminated crystals.

Trends of Hydrocarbon Exploration in the Devonian-Lower Carboniferous Beds of the Stepnovskij Composite Swell

Arguments are provided to substantiate relationship between the beds from the Devonian-Lower Carboniferous and the Visean petroleum complexes in the Stepnovskij swell and the wash-out zone (from the Timanskian to the Vorobyevskian beds) of the underlying Eifelian-Lower Frasnian complex. The data on the compositions of oils and free gases is used to show the presence of a lateral migration flow from the Pricaspian Depression to the southern and the southwestern areas of the Volga-Ural petroleum province.

Colonial Level of Modular Organization in the Late Cretaceous Hexactinellids (Porifera). Primary Colonies

In the structure of modular organization of the Late Cretaceous hexactinellid sponges, the terminal position is assigned to colonial forms, with skeletons peculiar for complex, intricate structures. Primitive (primary) and genuine (secondary) colonies have been revealed. Skeletons of the primary forms, generally with multiple numbers of equivalent modules and oscula, differ morphologically from the genuine colonies in undeveloped module connecting elements, such as junctions and wall closures, and in the lack of ostia


Forecast of Oil and Gas Deposits of Paleozoic Southwestern Buzuluk Basin

Described the geological structure of the south-western part of the basin Buzuluk. Here the thickness of the Paleozoic sediments has a similar structure to the north and south of the basin Buzuluk, where sediments of the Lower Carboniferous and Devonian numerous open gas deposits. The morphological, geophysical, geological, physical, and thermobaric lithological characteristics of the section. The description of the structure to which the deposits are associated with hydrocarbons. The methods of prospecting similar structures within the area under consideration

The Results of Geoecological Research of Oktyabrskiy Settlement Soil Cover (Dergachevskiy District Saratov Region)

The results of soil cover research of Oktyabrskiy settlement (Dergachevskiy district, Saratov region) are presented. The magnetic susceptibility value and zinc concentration in research area soil are measured. Content of soil cower transformation by analyzed components is estimated. Also authors drew conclusions about the general geoecological soil condition

Depositional Environment in Bobrikovsky Time within the South-east of the Russian Plate

The main results of lithology and facies investigations of the Bobrikovskian reservoir rocks material are based on processing drilling in recent years. The analysis of the existing ideas about the conditions of formation of the Lower Carboniferous terrigenous beds. It has been established that formation of terrigenous rocks in Bobrikovsky time had occurred in marine environment

The Echinoids Cyclaster and Galerites from the Maastrichtian Deposits of Volga Region

A first for the Volga region described two new species of echinoids and shows their stratigraphic position. Analyzed the relationship identified Maastrichtian sea urchins of the region coupled with synchronous complexes conjugate paleobiochores

Parageneses and Formation Histories of Clayey and Titanian Minerals from the West Siberian Terrigenous Reservoirs – the Basis for Predicting Oil and Gas Accumulation Zones

Detailed lithologic and geochemical investigations were used to show that the presence of hydrothermal coarsely lamellar, structurally perfect triclinic kaolinite (to a lesser extent, dickite) in association with regeneration and microdrusy quartz in terrigenous rocks is indicative of the weakly pulsating stress regime contributory to oil saturation in the mantle secondary reservoirs.

Laws of Placement a Fields of Building Rock in Territory of the Saratov Right Bank

The carried out analysis of a location of fields of a building rock on the Saratov right bank allows to reveal laws of placement of a mineral and factors of its forming that will help by finding and exploring of building raw material

Carnallite-halite Rocks and Halite of Gremyachinskoye Field’ Halogenous Formations and Their Role in Productive of Sylvinite Horizon Foundation

Carnallite-halite rocks are the elements of halogenesis’ final stage. Carnallite setting have to follow after sylvinite setting. At the real cut (Gremyachinskoye field also) such succession is disturbed and foundations of those formations proceed of potassium accumulation. Structure of those rocks reflects the receipt in basin with evaporated brine of slightly evaporated solution. NaCl and sometimes KCl are salting out and formed ground halite and rare sylvinite- carnallite rocks.

Autonomous Forms of the Late Cretaceous Modular Hexactinellids (Porifera)

In morphogenesis of the Late Cretaceous skeletal sponges – hexactinellids – certain tendencies may be traced that allow to distinguish forms of diverse levels of modular organization (≪polyoscula≫ sponges) among the unitary representatives of the group. Skeletons of the sponges from the primary level of modular forms, autonomies, represent an example of the initial module polymerization, with the principal polymerization mechanism involving diverse variants of gemmation and/or fission

The Late Cretaceous Lithofacies of the Bottom Volga Region

The distinctions of the late cretaceous lithofacies are considered. The genetic groups are marked. These groups conform to the different zones of the sea basin starting from littoral zones with an active hydrodynamics up to the abyssal zones and the areas of the depressions. The inharting of monotyped facial zones of different time levels is established. Three facial regions which are following each other in space are established

The Late Cretaceous Deposits of Potassium Soils at the Gremyachinsk Field

The authors consider the compound of the late cretaceous deposits opened up in the bore hole number 13, 62 at the Gremyachinsk field of the potassium soils in the Volgograd region. According to the sediment basins evolution from the epicontinental basins (cenoman, turon-cognacian) to the subpelagic basins (cenonian) the lithotipe which form in the late cretaceous level the regular repeated layers of the terrigenous, carbonate, argillaceous-siliceous deposits are characterized

Features of the Clayey Matter from the Late Triassic and Jurassic Basins of the Pricaspian Region

Examinations of the Late Triassic and Jurassic gray clay sections in the Pricaspian region frequently lead to incorrect conclusions on their monotony. Laborious methods are needed to divide such sequences. Investigations of their material compositions make it possible to reveal the features associated with the source-area landscape evolution and sedimentation.

Analytical solutions of three-dimensional geoelectric problems

A method for obtaining analytical solutions of Maxwell equations is proposed for stationary and alternating electromagnetic fields. In contrast to traditional methods of finding the analytical solutions, based on the solution of direct problems of electrical prospecting, this method uses a specially posed inverse problem. A package of new analytical solutions of three-dimensional problems of electrical prospecting is designed

On the Regional Prepermian Unconformity in the Sections from the edge Zones of the Pricaspian Depression

Factual data has been analyzed on the unconformities at the Carboniferous-Permian boundary in the sections from the edge and the inner by-edge zones of the Pricaspian Depression; varieties of opinions on the unconformity formation mechanisms have been analyzed, as well.

On the Role of the Salting-out Processes at the Final Stages of Halogenesis (the Case of the Gremyachinskoye Potassium-Salt Field)

Investigation of the ≪productive≫ intervals in the Gremyachinskoye potassium-salt field shows the potassium and potassium-magnesium salt settling to have been accompanied with large-scale salting out of sodium chloride due to interaction of highly concentrated solutions from that part of the salt-generating basin with the low concentrated ones. The constantly arriving low concentrated brine was peculiar for high contents of sodium chloride. That has resulted in large-scale salting-out of halite as lenses, crusts and randomly shaped clusters.

The Gas Poles in Conjunction Zones of the Large Geostructural Blocks of Complex Structure in the South-Eastern Part of the Russian Platform (within the Regional Uvarovo-Svobodniy Track, Saratov Region)

The article considers the features of the gasometric survey and seismic exploring results on the regional geophysic profile in territory of the large geostructual blocks on south-eastern part of Russian platform: Voronezh anticlise, Rjazano-Saratov’s deflection and Zhiguljov-Pugachov deflection. It selected testes of gas from 2m depth there are metan, its gomologes, hydrogen, gelium. In gas anomalies the fractured tectonic and geostructured elements reflected. Its presents the oil-gas prospecting interest.