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Издательство:
Дата издания
01.10.2021На каком языке издана
ISSN
2224-5278Область исследования
Тип исследования
Аннотация (краткое описание)
Comprehensive interpretation of geophysical data for studies of the Earth crust deep horizons in the Caspian oil and gas bearing region is based on analysis of regional seismic section wave fields as per reference geotravers and gravity anomalies’ interpretation results received by posing direct and inverse problems with use of specialized geoinformation systems. Gravity exploration data in the form of consolidated medium- and small-scale maps and the observed travel time graphs of DSS and Reflection Wave/DSS refraction waves taken in separate regional profiles serve as the factual basis for construction of deep geological-geophysical sections. Physical models of density and structural-velocity proved to be effective and allowed identifying vertical and lateral heterogeneities in the crust and upper mantle structure. The models for upper horizons of the Earth crust are most reliable, as they are provided with a large amount of factual material, including geological data. Structural-velocity sections built on regional seismic profiles revealed heterogeneous structure of the North-Caspian region’s lithosphere. Negative and positive velocity anomalies characterize the lower horizon blocks of the Earth crust and the upper mantle of different material composition and structure. The gravity models of deep structures and density distribution in the Earth crust allowed to reveal the vertical and sub-vertical boundaries of deep blocks, to predict the material composition of deep structures and to determine the peculiarities of their formation and tectonic development. Given the poorly explored territory and incomplete geophysical information, the proposed method of the complex interpretation of seismic gravimetric data enables to construct reliable density and velocity models of complex geological situation. The obtained models of the region’s deep structure can be effectively used both for reconstruction of Paleozoic geodynamic conditions and identification of the modern structural features of the Earth crust and upper mantle.DOI
https://doi.org/10.32014/2021.2518-170X.99Тип публикаций
Практическое значение
Comprehensive interpretation of geophysical data in the study of the Earth crust deep horizons in the Caspian oil and gas bearing region is based on analysis of wave fields of regional seismic sections and results of quantitative calculations of gravity anomalies based on methods of direct and inverse problems with extensive use of specialized geoinformation systems. In this study, materials of deep seismic sounding (DSS, EWS-DSS) along geotraverse lines crossing the Kazakhstan part of the North Caspian region were employed. In addition, when studying the structure of the Earth crust and the upper mantle of the Northern Caspian, seismic methods were applied: correlation refraction method, DSS and its combination with the method of earthquake exchange waves (EWS) on individual regional profiles.Квартиль
Источник квартиля
SCImago (Scopus)Impact Factor
1.3Количество цитирований
8Данный документ располагается в коллекциях
Международные публикации ученых SU
Scopus
Файлы документа
5.52021.pdf