ТЕКТОНИЧЕСКОЕ СТРОЕНИЕ И ИСТОРИЯ ГЕОЛОГИЧЕСКОГО РАЗВИТИЯ ЗЕЯ-БУРЕИНСКОГО ОСАДОЧНОГО БАССЕЙНА ПО РЕЗУЛЬТАТАМ КОМПЛЕКСНОЙ ИНТЕРПРЕТАЦИИ МАТЕРИАЛОВ БУРЕНИЯ И СЕЙСМОРАЗВЕДКИ

Abstract

The latest geological and geophysical information on the Zeya-Bureya sedimentary basin (Russia, Far East) is summarized. Based on drilling data from corehole and deep wells, 2D and 3D CDPM seismic data, taking into account the integrated interpretation of gravity and magnetic survey data, geological survey materials, a map was constructed on the surface of the pre-Mesozoic basement of the sedimentary basin, as well as structural maps on the top of the Cretaceous formations. The maps reflect a series of rift grabens and uplifts identified by the authors on seismic time sections during their reinterpretation. The method of constructing maps is given. A geological map of sediments overlying the pre-Mesozoic basement of the Zeya-Bureya sedimentary basin and a tectonic map of the sedimentary cover were constructed. During the tectonic zoning of the sedimentary cover, the classification of tectonic elements was adopted, which is widely used in the tectonic zoning of oil and gas regions, proposed by V.D. Nalivkin and updated at INGG SB RAS. As a result of tectonic zoning in the basin, the Inner Region and the Outer Belt were identified, and the tectonic elements complicating them were characterized. A characteristic feature of the Outer Belt is the presence of large intermediate structures - monoclines, mega- and mesomonoclines. On the contrary, the Inner region of the basin is characterized by the presence of a large negative structure, complicated by smaller positive and negative elements. The main stages of the formation and development of the sedimentary cover of the Zeya-Bureya sedimentary basin are identified and described: rifting, early syneclise, late syneclise and neotectonic.