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JOURNAL: No. 3(35) 2019, p. 62-72

HEADING: Research activities in the Arctic

AUTHORS: Sharov, N.V., Zhuravlev, V.A.

ORGANIZATIONS: Institute of Geology of the Karelian Research Centre of the Russian Academy of Sciences, JSC Marine Arctic Geological Expedition

DOI: 10.25283/2223-4594-2019-3-62-72

UDC: 550.838.3

The article was received on: 25.01.2019

Keywords: White sea, geophysical fields, Fennoscandian Shield, lithosphere, seismic model, M-discontinuity border

Bibliographic description: Sharov, N.V., Zhuravlev, V.A. The crustal structure of the White Sea and adjacent territories. Arctic: ecology and economy, 2019, no. 3(35), pp. 62-72. DOI: 10.25283/2223-4594-2019-3-62-72. (In Russian).


It is assumed that the continental crust in the region under consideration was formed in the Archean, and the structure of the Precambrian blocks has survived to the present. Later, the crust underwent significant transformations only in the areas of tectono-magmatic activation of a rift or plume nature. This is confirmed by the coincidence in terms of the sources of large anomalies of the gravitational and magnetic fields on the Fennoscandinavian shield and the discrepancy between the shape and the planned position of the anomalies in the north-eastern part of the Mezensyneclise, which is obviously associated with manifestations in early and late Proterozoic rifting and subsequent active tectonic-magmatic processes imposed on the northeast edge of the East European Platform.
Structural and compositional features of the blocks are manifested in geophysical fields, and the largest can be traced to great depths. Linear anomalies of potential fields extending over hundreds of kilometers confirm the crust split into large blocks. Geological and geophysical data, as well as the age dating and metamorphic grade of the rocks that constitute the rock complexes indicate that the blocks were formed in various geodynamic conditions.

Finance info: Работа выполнена при финансовой поддержке РФФИ в рамках научного проекта № 19-05-00481 «Строение и динамика литосферы Беломорья».


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DOI 10.25283/2223-4594