Lithosphere Density Model of the Middle Urals Segment

• Published in: Izvestiya. Physics of the solid earth Vol. 59; no. 2; pp. 160 - 174
• Main Authors: Ladovskii, I. V., Martyshko, P. S., Tsidaev, A. G., Kolmogorova, V. V., Byzov, D. D.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.04.2023; Springer Nature B.V
• Subjects: Algorithms; Approximation; Construction; Density distribution; Density sections; Earth and Environmental Science; Earth Sciences; Geographical coordinates; Geophysics; Geophysics/Geodesy; Gravimetry; Inverse problems; Lithosphere; Platforms (geology); Potential fields; Segments; Seismic profiles; Seismic tomography; Tomography; Velocity; seismic profiles; 3D interpolated density model; velocity and density sections; separation of gravity anomalies; linear inverse problem of gravimetry for heterogeneous horizontal layers
• ISSN: 1069-3513; 1555-6506
• DOI: 10.1134/S1069351323020088

—For the Middle and North Urals segments and adjacent territories of the East European Platform and West Siberian Plate (within the graticular trapezoid with geographic coordinates 53°–65° N, 48°–72° E), ten deep seismic sounding (DSS) profiles were reprocessed using two-dimensional (2D) seismic tomography method, and gradient sections of crustal velocities were constructed in the form of grid functions. In the same format, density sections were constructed. The coefficients of density–velocity empirical correlation were calculated using the solution algorithm of 2D inverse problem of gravimetry. The method and calculation technology of a three-dimensional (3D) density distribution with tying to 2D data from reference seismic sections are embedded in the procedure of quantitative interpretation of potential fields with construction of 3D geophysical models. A stable solution of the 3D inverse problem of gravimetry is sought on the correctness set of the family of horizontal layers with 2D density distribution.