Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 6a9c15cb32807fdbab86dd43 10.2205/2026es001097 ywabdw ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ Tectonic Structure Features of the Russko-Chaselsky Ridge (West Siberian Petroleum Basin) Based on Integrated Geophysical Studies Tectonic Structure Features of the Russko-Chaselsky Ridge (West Siberian Petroleum Basin) Based on Integrated Geophysical Studies https://orcid.org/0009-0006-2241-1400 Козлов Михаил Павлович Kozlov Mikhail Pavlovich https://orcid.org/0000-0001-5458-648X Сенчина Наталия Петровна Senchina Nataliya Petrovna n_senchina@inbox.ru

кандидат геолого-минералогических наук;

candidate of geological and mineralogical sciences;

 https://orcid.org/0000-0003-3892-7947 Секерина Дарья Денисовна Sekerina Dar'ya Denisovna sekerinadar@mail.ru

кандидат геолого-минералогических наук;

candidate of geological and mineralogical sciences;

 https://orcid.org/0009-0004-9535-0907 Исмагилова Эмилия Ильдаровна Ismagilova Emilia Ildarovna ООО НПЦ «Геостра» Россия LLC Research and Production Center “Geostra” Russian Federation Санкт-Петербургский горный университет Санкт-Петербург Россия Saint-Petersburg Mining University Saint-Petersburg Russian Federation Арктический и антарктический научно-исследовательский институт Россия Arctic and Antarctic Research Institute Russian Federation Санкт-Петербургский горный университет Санкт-Петербург Saint Petersburg Mining University Saint Petersburg Санкт-Петербургский горный университет Россия Saint Petersburg Mining University Russian Federation 21 08 2026 21 08 2026 26 3 ES3011 22 04 2025 10 12 2025 © 2026 Козлов М.П., Сенчина Н.П., Секерина Д.Д., Исмагилова Э.И. © 2026 Kozlov M.P., Senchina N.P., Sekerina D.D., Ismagilova E.I. 2026 Козлов Михаил Павлович, Сенчина Наталия Петровна, Секерина Дарья Денисовна, Исмагилова Эмилия Ильдаровна Kozlov Mikhail Pavlovich, Senchina Nataliya Petrovna, Sekerina Dar'ya Denisovna, Ismagilova Emilia Ildarovna https://rjes.ru/en/nauka/publications/6a9c15cb32807fdbab86dd43/view

The article presents the results of integrated geophysical studies conducted in an area encompassing the Russko-Chaselsky Ridge (Western Siberia). The work is aimed at investigating the tectonic structure of the area, with a focus on the characterization of rift-related formations and manifestations of strike-slip dislocations. The authors carried out a comprehensive analysis of 2D and 3D seismic survey data, as well as gravity and magnetic field data. The study includes fault mapping and the correlation of geological structures with diverse geophysical data through modeling. The tectonic structures of the Koltogory-Urengoy and Khudosey graben-rifts, as well as the Russko-Chaselsky Ridge, were examined. Based on the correlation of positive gravity and magnetic field anomalies with the localization of Triassic-age graben-rifts, an additional segmented branch within the rift system was identified. An analysis of local anomalies in potential fields suggests the presence of strike-slip deformations, which may be valuable for preliminary studies in areas with sparse seismic survey networks and for planning exploration activities, including seismic surveys. The results contribute to refining the tectonic model of the region. The authors emphasize the need for further application of integrated geophysical methods to achieve detailed mapping of the tectonic structures in the West Siberian Basin, assess the role of fault dislocations in forming oil and gas traps, and understand their control over hydrocarbon migration.

The article presents the results of integrated geophysical studies conducted in an area encompassing the Russko-Chaselsky Ridge (Western Siberia). The work is aimed at investigating the tectonic structure of the area, with a focus on the characterization of rift-related formations and manifestations of strike-slip dislocations. The authors carried out a comprehensive analysis of 2D and 3D seismic survey data, as well as gravity and magnetic field data. The study includes fault mapping and the correlation of geological structures with diverse geophysical data through modeling. The tectonic structures of the Koltogory-Urengoy and Khudosey graben-rifts, as well as the Russko-Chaselsky Ridge, were examined. Based on the correlation of positive gravity and magnetic field anomalies with the localization of Triassic-age graben-rifts, an additional segmented branch within the rift system was identified. An analysis of local anomalies in potential fields suggests the presence of strike-slip deformations, which may be valuable for preliminary studies in areas with sparse seismic survey networks and for planning exploration activities, including seismic surveys. The results contribute to refining the tectonic model of the region. The authors emphasize the need for further application of integrated geophysical methods to achieve detailed mapping of the tectonic structures in the West Siberian Basin, assess the role of fault dislocations in forming oil and gas traps, and understand their control over hydrocarbon migration.

 strike-slip structures graben-rift Western Siberia oil and gas potential gravity anomalies magnetic anomalies seismic survey Russko-Chaselsky Ridge Urengoy graben-rift Khudosey grabenrift hydrocarbon traps tectonic faults fractures potential fields tectonic model strike-slip structures graben-rift Western Siberia oil and gas potential gravity anomalies magnetic anomalies seismic survey Russko-Chaselsky Ridge Urengoy graben-rift Khudosey grabenrift hydrocarbon traps tectonic faults fractures potential fields tectonic model The authors express their gratitude to A. S. Egorov (Head of the Department of Geophysics, Empress Catherine II St. Petersburg Mining University) and to the LLC Research and Production Center “Geostra”. The authors express their gratitude to A. S. Egorov (Head of the Department of Geophysics, Empress Catherine II St. Petersburg Mining University) and to the LLC Research and Production Center “Geostra”.

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