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Study of the structure and seismicity of the near-surface zone of the earth's crust at the White Sea seismogenic zone on the Kola Peninsula
DOI: 10.21443/1560-9278-2020-23-1-5-12
Abstract. The Kandalaksha-Bothnian deep fault is the subject of a comprehensive geological and geophysical study in connection with the development of the Shtokman gas field on the Kola Peninsula. In the process of studying the structure and seismicity of the near-surface zone of the earth's crust in the vicinity of the route of the planned Shtokman – Volkhov gas pipeline, the following have been carried out: 1) lineament analysis of the topographic map where the lines of the supposed faults were plotted, corresponding to the beds of the largest rivers, large streams, elongated lakes and bays; 2) analysis of the geological profile along the class I levelling line; 3) comparison of the lineament analysis results with the results of the geological profile analysis along the levelling line. When determining seismic risks, the sources of earthquakes occurred in the study area have been mapped; the impact of recorded earthquakes on the designed pipeline has been estimated and seismic intensity has been calculated at the point of the pipeline route design closest to the earthquake epicenter. Georadar studies of areas of the Kandalaksha seismogenic zone, interpretation and analysis of the obtained radarograms have made it possible to identify lineaments that coincide in location with faults, subsurface boundaries indicated on the geological section, outline the layers of bulk and natural soils and rocks with high accuracy and identify areas with anomalous physical and mechanical properties, fracture zones, as well as the boundary of the rocky base under the moraine and to conclude that the earthquakes occurred theoretically would not have had a significant impact on the projected pipeline. Thus, it is possible to carry out industrial construction in the study area (including linearly extended objects), taking into account the limitations caused by the Kandalaksha-Botnichsky deep fault seismicity indices obtained during georadar analysis.
Printed reference: Demahin A. Yu. Study of the structure and seismicity of the near-surface zone of the earth's crust at the White Sea seismogenic zone on the Kola Peninsula // Vestnik of MSTU. 2020. V. 23, No 1. P. 5-12.
Electronic reference: Demahin A. Yu. Study of the structure and seismicity of the near-surface zone of the earth's crust at the White Sea seismogenic zone on the Kola Peninsula // Vestnik of MSTU. 2020. V. 23, No 1. P. 5-12. URL: http://vestnik.mstu.edu.ru/v23_1_n82/01_Demahin_5-12.pdf.
