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Home Archive of journals No. 4(40) 2020 Velocity structure and density inhomogeneities of the White Sea crust

VELOCITY STRUCTURE AND DENSITY INHOMOGENEITIES OF THE WHITE SEA CRUST

JOURNAL: No. 4(40) 2020, p. 43-53

HEADING: Research activities in the Arctic

AUTHORS: Sharov, N.V., Bakunovich, L.I., Belashev, B.Z., Nilov, M.Y.

ORGANIZATIONS: Institute of Geology of the Karelian Research Centre of the Russian Academy of Sciences

DOI: 10.25283/2223-4594-2020-4-43-53

UDC: 550.838.3

The article was received on: 24.07.2020

Keywords: White sea, Fennoscandian Shield, lithosphere, seismic model, velocity model, density model, velocity layers, Mohorovichich boundary, Integro software package

Bibliographic description: Sharov, N.V., Bakunovich, L.I., Belashev, B.Z., Nilov, M.Y. Velocity structure and density inhomogeneities of the White Sea crust. Arctic: ecology and economy, 2020, no. 4(40), pp. 43-53. DOI: 10.25283/2223-4594-2020-4-43-53. (In Russian).


Abstract:

The study area is the White Sea basin and adjacent territories. The relevance of the work carried out here is determined by active geodynamics, kimberlite magmatism, and prospects for the hydrocarbon search. The authors set the goal to model the velocity structure of the region’s crust using data from instrumental observations and the Integro software package. A comprehensive interpretation of gravimetric, magnetometric, seismic, petrophysical and geological data has been carried out. With the help of 2D models based on the DSZ profiles and digital maps of geophysical fields, refined density structures of local sections of the earth’s crust have been specified. The developed 3D density model gives a general picture of the deep structure of the region’s crust. Within its framework, the spatial positions of the layers of the velocity reference model are determined and their connections with density inhomogeneities and geophysical anomalies are established.


Finance info: The work was performed within the framework of the research project AAAA-A18-118020290086-1 with the financial assistance of the RFBR within the framework of the scientific projects No. 20-05-00481 Structure and dynamics of the White Sea lithosphere and No. 20-35-90034 Integration of geophysical methods for 2D and 3D modeling the Earths crust of the White Sea and adjacent territories.

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DOI 10.25283/2223-4594