DEEP CRUSTAL STRUCTURE IN NORTHEASTERN EURASIA AND ITS CONTINENTAL MARGINS

• Published in: Geodynamics & Tectonophysics
• Main Authors: S. N. Kashubin, O. V. Petrov, S. P. Shokalsky, E. D. Milshtein, E. A. Androsov, I. Yu. Vinokurov, O. A. Tarasova
• Format: Article in Journal/Newspaper
• Language: English; Russian
• Published: Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust 2021
• Subjects: gravity anomaly; deep seismic sounding; moho boundary; sedimentary cover; consolidated crust; oceanic; transitional; continental crust; continent-ocean transition zone; geotransect; Science; Q; Arctic; Arctic Ocean; Pacific
• Online Access: https://doi.org/10.5800/GT-2021-12-2-0521; https://doaj.org/article/56a1a023237146b0a7c0fa1ea965d886

The paper reports on the deep geophysical studies performed by the Geological Survey of Russia (VSEGEI) under the international project – Deep Processes and Metallogeny of Northern, Central and Eastern Asia. A model of the deep crustal structure is represented by a set of crustal thickness maps and a 5400-km long geotransect across the major tectonic areas of Northeastern Eurasia. An area of 50000000 km2 is digitally mapped in the uniform projection. The maps show the Moho depths, thicknesses of the main crustal units (i.e. the sedimentary cover and the consolidated crust), anomalous gravity and magnetic fields (in a schematic zoning map of the study area), and types of the crust. The geotransect gives the vertical section of the crust and upper mantle at the passive margin of the Eurasian continent (including submarine uplifts and shelf areas of the Arctic Ocean) and the active eastern continental margin, as well as an area of the Pacific plate.