Geology, geography and global energy
Scientific and Technical Journal
Geological characteristics, genesis and granulomatric compostion of sandy rocks of the Astrakhan Caspian region
2018. №2, pp. 65-73
Ushivtseva L.F. - C.Sc. in Geology and Mineralogy, Associate Professor, Astrakhan State University, 1 Shaumyan sq., Astrakhan, 414000, Russian Federation, ushivceval@mail.ru
Solovyova A.V. - Senior Lecturer, Astrakhan State University, 1 Shaumyan sq., Astrakhan, 414000, Russian Federation, sav49@inbox.ru
Quarternary deposits compose extensive spaces of Caspian Depression, being the integumentary floor; form the basis of the bases at construction of buildings and onstructions of infrastructure. They are presented as a part of the lower, average, top pleistocene and the Holocene. The section is put by various genetic types of soil among which the sea, alluvial and aeolian deposits which are carrying out valleys of the Volga Rivers, Akhtuba and their inflows and extensive spaces use the greatest distribution. A number of factors had a significant impact on the lithological composition and properties of Sands: the climate, eras of freezing, transgression and regression of the Caspian Sea, existence of powerful thickness of salts shown the salt tectogenesis lasting throughout all Quaternary Period, the neotectonic movements in the Neogene-pleystotsenovoye time. All specified factors influenced not only sedimentation process, creating local facial conditions, but also changed character of bedding of the complexes which are built up the stratigraficheskikh, promoted their destruction, uplift or immersion that has affected deformation and strength effect on the properties of the rock. In lithological terms Quaternary deposits are represented mainly by clay and sand rocks of different Genesis. In the present article are considered characteristics of the sandy rocks. Рўhe sandy rocks within the Astrakhan region are presented by deposits of several genetic types: sea, aeolian, alluvial sands which are characterized by similar mineralogical structure and high degree of a sortirovannost. The sea deposits composing extensive spaces of Caspian Depression and also the alluvial deposits which are carrying out valleys of the Volga Rivers, Akhtuba and their inflows use the greatest distribution. On watersheds and their slopes integumentary alluvial and diluvial deposits are allocated.
Key words: песчаные породы, голоцен, плейстоцен, гранулометрический состав, эоловые отложения, аллювий, делювий, соляной тектогенез, sandy soil, Holocene, pleistocene, deformation module, angle of friction, resistance to a cone, particle size distribution, aeolian d
 |
Read |