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Home Archive of journals Volume 11, No. 3, 2021 D magnetic model of the Earths crust of the White Sea and adjacent territories


JOURNAL: Volume 11, No. 3, 2021, p. 375-385

HEADING: Research activities in the Arctic

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

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

DOI: 10.25283/2223-4594-2021-3-375-385

UDC: 550.838.3

The article was received on: 05.03.2021

Keywords: White sea, Earh crust, Integro software package, abnormal magnetic field, effective magnetic susceptibility, 3D model

Bibliographic description: Nilov, M.Y., Bakunovich, L.I., Sharov, N.V., Belashev, B.Z. D magnetic model of the Earths crust of the White Sea and adjacent territories. Arktika: ekologiya i ekonomika. [Arctic: Ecology and Economy], 2021, vol. 11, no. 3, pp. 375-385. DOI: 10.25283/2223-4594-2021-3-375-385. (In Russian).


An important task for the White Sea region, Russia’s second largest diamond-producing province, is the search for magmatic bodies overlapped by sedimentary cover via magnetometer survey. The models, linking local and magnetic anomalies with their sources, are essential for interpretation of search results. The aim of the study is to build a 3D magnetic model of the Earth’s crust for the White Sea region using aeromagnetic data and the modeling technologies of the Integro software package. The simulation is basing on a digital map of the pole-reduced anomalous magnetic field. The sources of magnetic anomalies are believed to be located in the Earth’s crust. The researchers obtained 3D distribution of the relative magnetic susceptibility of rocks by solving the inverse problem of magnetic prospecting. To separate the magnetic sources by spatial frequencies and depth, the model magnetic field was recalculated upward, as well as the TDR derivatives, which determine the lateral boundaries of the sources of positive magnetic field anomalies, were calculated. The researchers further analyzed 2D distributions of the magnetic sources of the model for vertical and horizontal sections with depths of 10, 15 and 20 km, thus proving the relationship between the surface and deep structures of the magnetic sources of the Earth’s crust in the region.

Finance info: The work was carried out within the framework of the research and development project AAAA-A18-118020290086-1 with the financial support of the Russian Foundation for Basic Research within the scientific projects No. 21-05-00481 Structure and dynamics of the White Sea lithosphere and No. 21-35-90034 Integration of geophysical methods for 2D and 3D modeling of the Earths crust of the White Sea and adjacent territories.


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DOI 10.25283/2223-4594