Геология

The paper presents the results of a study of the insoluble residue of sylvinites and sylvin-halite rocks of the Lower Permian halogen formation, common within the Perelyubsky areas (Western and Eastern), promising for industrial development (Saratov Region) and the Gremyachinsky potash deposit (Volgograd Region). A technique for studying the insoluble residue of sylvinites is presented. The types of insoluble residue are distinguished according to the form of occurrence in sylvinites and its mineral composition is characterized.

The first representatives of Cameroptychium on the territory of Russia, which are established in the rocks of the Upper Cretaceous of the Volga region, are described. The labyrinthine structure of the skeleton and the modular, colonial level of organization of these sponges are considered, which is typical for many Late Cretaceous Hexactinellids. The widespread manifestation of isomorphism indicates the finiteness of the formation of representatives of Hexactinellida. The origin of Cameroptychium is correlated with Santonian Plocoscyphia.

Among the numerous and diversiform Late Cretaceous siliceous sponges collected throughout the Volga region, several representatives of the genus Botryosella have been encountered, previously unknown for the area. Analysis of the skeleton morphology, peculiar for massive transverse outgrowths, confirms manifestations of isomorphism in Hexactinellids and the opinion of inaccuracies available in the descriptive terminology applied to the skeletal morphology of this Porifera group.

Based on new data on seismicity and materials from surveys of active faults, information was obtained on regional seismogenic structures of the European-African through tectonic belt. The kinematic characteristics of the faults that make up the through tectonic belt and earthquakes that occurred within these structures are given.

Our own research data as well as numerous publications of recent years on modern problems of oil potential in the West Siberian oil and gas province were used in this study.

The article summarizes the comprehensive analysis of the results of interpretation for the materials of the wide-azimuth seismic survey MOGT-3D for the purpose of a detailed study of the geological structure of one of the sites of the Volgogradskoe Zavolzhye area to identify and
prepare for drilling oil and gas prospective objects.

Based on the review of the published data, the article analyzes the study of the problem of oil pollution migration in the upper part of the geological environment in the conditions of the Far North, where the movement of oil pollution occurs mainly in the layer of seasonal freezing and thawing of the cryolithozone. The factors influencing the spreadability and transport of oil, including the focus on the processes of formation of possible migration routes into frozen rocks are considered.