Geology, geography and global energy

Scientific and Technical Journal

Рђ RESULTS OF REGIONAL PALEOGEOMORPHOLOGICAL STUDIES OF THE SEDIMENTARY OF DEPOSITS OF THE SOUTH-WESTERN CASPIAN SEA

2019. №4, pp. 35-44

Bystrova Inna V. - Ph. D. in Geology and Mineralogy, Associate Professor, Astrakhan State University, 1 Shaumyana Sq., Astrakhan, 414000, Russian Federation, Juliet_23@mail.ru

Smirnova Tatyana S. - Ph. D. in Geology and Mineralogy, Associate Professor, Astrakhan State University, 1 Shaumyana Sq., Astrakhan, 414000, Russian Federation, Juliet_23@mail.ru

The relevance of the work is due to the fact that paleogeomorphological studies are necessary for the geological assessment of the forecast resources of the South-Western Caspian sea. The authors carried out paleogeomorphological analysis of sedimentary deposits (lower Triassic and middle Jurassic), confined to certain forms of paleorelief. This made it possible to recommend areas of development of non-anticline structures for detailed geophysical and prospecting works of Vetluzhsky and Baskunchak deposits. Models of the structure were created and local and regional geological characteristics of the pre-Triassic and pre-Jurassic paleoreliefs in the South-Western Caspian region were given. It was revealed that a significant role in the accumulation of continental sediments belongs to the proximity of Kungur salts to the daytime surface, as well as to the dry hot climate. It has been established that paleogeomorphological interpretation of geological and geophysical material allows us to identify areas of development of non-anticline structures in the sedimentary section of rocks, including in the lower Triassic and middle Jurassic sediments. Conclusions: paleogeomorphological studies confirm that mineral deposits in the South-Western Caspian Sea in the lower Triassic and middle Jurassic sediments are confined to certain forms of relief. They were crucial in sedimentation with the leading role of the modern structural plan for reflecting horizons in the geological section.

Key words: палеорельеф, палеогеоморфология, ветлужские и баскунчакские отложения, аккумулятивно-денудационная равнина, палеорусла, палеодолина, paleorelief, paleogeomorphology, Vetluzhsky and Baskunchak deposits, accumulative-denudation plain, paleorusla, paleodolin

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