Structural Tectonic Scheme Creation Based on Seismic-Gravity Models and Isostasy Usage: Ural Case

Author:

Martyshko Petr1ORCID,Ladovskii Igor2ORCID,Byzov Denis2ORCID,Cidaev Aleksandr3

Affiliation:

1. Bulashevich Institute of Geophysics UB of RAS

2. Institute of Geophysics named after Yu.P. Bulashevich Ural Branch of the Russian Academy of Sciences

3. Bulashevich Institute of Geophysics, UB RAS

Abstract

Process of Earth’s density models creation leads to the solution of direct and inverse gravimetry problems. The inverse problem of gravimetry is a classic example of an ill-posed problem: in the common statement, its solution is not unique and unstably depends on input data. Therefore, it is necessary to determine solutions belonging substantial sets of correctness, choosing reasonable models of an initial approximation. In this paper the application of complex interpretation methods of seismic and gravitational data for the creation of three-dimensional models of crust and the upper mantle are presented. Original algorithms and programs were developed for implementation of these methods. They contain solution of non-linear (structural) inverse problem and the solution of the linear three-dimensional inverse problem taking note of the side sources. Coefficients of the “density-velocity” correlation formulas for a number of geo-traverses were defined. Also, we suggest a technique of tectonic maps construction, which is based on the lithostatic pressure calculation. Its idea can be applied to both two- and three-dimensional cases. In the 2D case we show the way to split the mantle to blocks with vertical boundaries. If lithostatic compensation hypothesis is adopted, the method also allows one to calculate density value for each block. Such separation of the mantle helps to diminish discrepancy between model and observed fields. In 3D case we suggest a method, which can be used to construct tectonic structure maps with information about approximate depth and height of each tectonic block.

Publisher

Geophysical Center of the Russian Academy of Sciences

Reference13 articles.

1. Druzhinin, V. S., A. V. Egorkin, and S. N. Kashubin (1990), New information on the plutonic structure of the Urals and adjoining areas, derived from deep seismic sounding data, Doklady of the Academy of Sciences of the USSR. Earth Science Sections, (315), 67-71., Druzhinin, V. S., A. V. Egorkin, and S. N. Kashubin (1990), New information on the plutonic structure of the Urals and adjoining areas, derived from deep seismic sounding data, Doklady of the Academy of Sciences of the USSR. Earth Science Sections, (315), 67-71.

2. Geng, M., M. Y. Ali, J. Derek Fairhead, S. Pilia, Y. Bouzidi, and B. Barkat (2022), Crustal structure of the United Arab Emirates and northern Oman Mountains from constrained 3D inversion of gravity and magnetic data: The Moho and basement surfaces, Journal of Asian Earth Sciences, 231, https://doi.org/10.1016/j.jseaes.2022.105223., Geng, M., M. Y. Ali, J. Derek Fairhead, S. Pilia, Y. Bouzidi, and B. Barkat (2022), Crustal structure of the United Arab Emirates and northern Oman Mountains from constrained 3D inversion of gravity and magnetic data: The Moho and basement surfaces, Journal of Asian Earth Sciences, 231, https://doi.org/10.1016/j.jseaes.2022.105223.

3. Jiménez-Munt, I., M. Fernàndez, J. Vergés, J. C. Afonso, D. Garcia-Castellanos, and J. Fullea (2010), Lithospheric structure of the Gorringe Bank: Insights into its origin and tectonic evolution: GORRINGE BANK STRUCTURE AND EVOLUTION, Tectonics, 29(5), 1-16, https://doi.org/10.1029/2009TC002458., Jiménez-Munt, I., M. Fernàndez, J. Vergés, J. C. Afonso, D. Garcia-Castellanos, and J. Fullea (2010), Lithospheric structure of the Gorringe Bank: Insights into its origin and tectonic evolution: GORRINGE BANK STRUCTURE AND EVOLUTION, Tectonics, 29(5), 1-16, https://doi.org/10.1029/2009TC002458.

4. Ladovskii, I. V., P. S. Martyshko, D. D. Byzov, and V. V. Kolmogorova (2017), On selecting the excess density in gravity modeling of inhomogeneous media, Izvestiya, Physics of the Solid Earth, 53(1), 130-139, https://doi.org/10.1134/S1069351316060057., Ladovskii, I. V., P. S. Martyshko, D. D. Byzov, and V. V. Kolmogorova (2017), On selecting the excess density in gravity modeling of inhomogeneous media, Izvestiya, Physics of the Solid Earth, 53(1), 130-139, https://doi.org/10.1134/S1069351316060057.

5. Li, Y., and Y. Yang (2020), Isostatic state and crustal structure of North China Craton derived from GOCE gravity data, Tectonophysics, 786, https://doi.org/10.1016/j.tecto.2020.228475., Li, Y., and Y. Yang (2020), Isostatic state and crustal structure of North China Craton derived from GOCE gravity data, Tectonophysics, 786, https://doi.org/10.1016/j.tecto.2020.228475.

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