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Three-dimensional density model of the mantle beneath the Ukrainian shield

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Category: Content №2 2024

Last Updated on 01 May 2024

Published on 30 November -0001

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Authors:

L.Shumlianska*, orcid.org/0000-0003-0234-7916, Institute of Geophysics by S.I. Subbotin name, National Academy of Sciences of Ukraine, Kyiv, Ukraine; Mediterranean Institute of Advanced Studies (­IMEDEA – CSIC – UIB), Esporles, the Kingdom of Spain, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

P.Pigulevskiy, orcid.org/0000-0001-6163-4486,  Institute of Geophysics by S.I. Subbotin name, National Academy of Sciences of Ukraine, Kyiv, Ukraine; Dnipro University of Technology, Dnipro, Ukraine, e-mail: pigulev@ ukr.net

V.Vilarrasa, orcid.org/0000-0003-1169-4469, Mediterranean Institute of Advanced Studies (­IMEDEA – CSIC – UIB), Esporles, the Kingdom of Spain, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2024, (2): 012 - 018

https://doi.org/10.33271/nvngu/2024-2/012

Abstract:

Purpose. Mantle density models are key tools for understanding the fundamental geological and physical processes occurring within the Earth and are essential to our scientific and applied understanding of the planet.

Methodology. The tasks were solved by a complex research method, including analysis and generalization of literary and patent sources, analytical, experimental studies, using computer and mathematical modelling methods.

Findings. One-dimensional models simplify the mantle density distribution by assuming that it is uniform only in the vertical direction. This limitation does not allow for horizontal variations in mantle density, which may be important on a regional scale. 3D models are more complex and require more data and computational resources, so their use may be limited. In this study, we present a quasi-three-dimensional model of mantle density beneath the Ukrainian Shield. This 3D model is obtained using a basic set of one-dimensional seismic tomographic velocity models calculated for 21 mantle domains in the depth range from 50 to 2,600 km. The process of converting the P-wave velocity model into a density model includes the following stages: 1) determining seismic boundaries in the mantle based on P-wave velocity curves for each mantle domain; 2) creating a synthetic mantle model beneath the Ukrainian Shield for the P,S-wave velocity curves; 3) solving the Adams-Williamson equation for each domain, considering polynomial corrections to extract heterogeneities during its solution; 4) analysing existing models by comparing the calculated gravitational potential at the central point of the Ukrainian Shield as the standard reference for selecting one of 5 reference models. Here, we focus on the final stages of constructing the mantle density model by: 1) balancing the mass of the upper and lower mantle for each domain when determining density using the Adams-Williamson equation and introducing polynomial corrections; 2) calculating densities for each of the 21 mantle domains and their 3D integration.

Originality. The obtained mantle-density model of the Ukrainian Shield aligns well with the division of the mantle into three main layers: lithosphere, upper mantle, and lower mantle. Each of the mantle’s structural layers has its representation pattern in density heterogeneities. Anomalies of decreased density in the lithosphere of the Ukrainian Shield correlate with thermal anomalies, whereas anomalies of increased density correspond to tectonic zones dividing its megablocks.

Practical value. Regions of increased density gradient are associated with mantle thrust faults, which in some cases can be boundaries between different petrological formations and serve as channels for magma ascent into the Earth’s crust at certain stages of geological development of the Ukrainian shield and, in turn, be sources of minerals.

Keywords: Ukrainian Shield, mantle, Adams-Williamson equation, density, 3-D model

References.

1. Jeroen, R., & Lekic, V. (2020). Heterogeneity of Seismic Wave Velocity in Earth’s Mantle. Annual Review of Earth and Planetary Sciences, 48, 377-401. https://doi.org/10.1146/annurev-earth-082119-065909.

2. Pigulevsky, P. I., & Svistun, V. K. (2014). Geological and geophysical model of the Azov megablock of the Ukrainian shield (analysis, modeling, results). Donetsk: Knowledge (Donetsk branch).

3. Kern, H., & Tubia, J. M. (1993). Pressure and temperature dependence of P- and S-wave velocities, seismic anisotropy and density of sheared rocks from the Sierra Alpujata massif (Ronda peridotites, Southern Spain). Earth and Planetary Science Letters, 119(1-2), 191-205. https://doi.org/10.1016/0012-821X(93)90016-3.

4. Shumlianska, L., Dubovenko, Y., & Pigulevskiy, P. (2021). On the possibility of creating a synthetic S-velocity model by recalculating the P-velocity model. Bulletin of Tarasa Shevchenko National University of Kyiv, 4(95), 46-53. https://doi.org/10.17721/1728-2713.95.06.

5. Nathan, A. S., Alessandro, M. F., Lapo, B., & Stephen, P. G. (2010). GyPSuM: A joint tomographic model of mantle density and seismic wave speeds. Journal of Geophysics Research, Solid Earth, 115(B12), B12310. https://doi.org/10.1029/2010JB007631.

6. Shumlianska, L. O., Tripol`sky, О. A., & Tsvetkova, T. О. (2014). Influence of crustal velocity structure on the results of seismic tomography of the Ukrainian Shield. Geophysical Journal, 36(4), 95-117. https://doi.org/10.24028/gzh.0203-3100.v36i4.2014.116030.

7. Shumlianska, L., Dubovenko, Yu., & Pigulevskiy, P. (2020). 2.5 dimensional model of mantle heterogeneities under the Ukrainian shield according to the gradients of the velocities of seismic waves. Journal of Geology, Geography and Geoecology, 29(2), 431-441. https://doi.org/10.15421/112039.

8. Shumlianska, L., & Pigulevskiy, P. (2022). Using polynomial corrections to produce an optimal one-dimensional model of the mantle density. Bulletin of Tarasa Shevchenko National University of Kyiv, 2(97), 51-59. https://doi.org/10.17721/1728-2713.97.07.

9. Data Services Products: EMC-Reference Models (n.d.). Retrieved from https://ds.iris.edu/ds/products/emc-referencemodels/.

10. Svistun, V., & Pigulevskiy, P. (2021). Gravimetric survey and gravimetric database in Ukraine “Dniepr-geophysics” during 2000-2011 carried out works on collection, analysis and formation of an electronic gravimetric data base (GDB) of the territory of Ukraine. Based on the results of the work car. 20 ^th International Conference Geoinformatics – Theoretical and Applied Aspectshis, 11–13 May, 2021, Kyiv, Ukraine, 1-7. https://doi.org/10.3997/2214-4609.20215521132.

11. Geyko, V. S. (2004). A general theory of the seismic travel-time tomography. Geophysical journal, 26(2), 3-32.

12. Zhang, J., & McMechan, A. (1995). Estimation of resolution and covariance for large matrix inversion. Geophysical Journal International, 121, 409-426. https://doi.org/10.1111/j.1365-246X.1996.tb01548.x.

13. Kurlov, N. S., Sheremet, E. M., Kozar, N. A., Gurskii, D. S., Gei­chen­ko, M. V., Shcherbak, N. P., …, & Foshchii, N. V. (2011). Kryvyy Rih super-deep well SG-8. Donetsk: Noulidge.

14. Azarov, N. Y., Antsiferov, A. V., Sheremet, E. M., & Glevassky, E. B. (2005). Geological and geoelectric model of the Orihiv-Pavlohrad suture zone of the Ukrainian Shield. Kyiv: Naukova Dumka.

15. Azarov, N. Y., Antsiferov, A. V., Sheremet, E. M., & Glevass­ky, E. B. (2006). Geological and geophysical model of the Krivyy Rih-Kremenchuh suture zone of the Ukrainian Shield. Kiev: Naukova Dumka.

16. Antsiferov, A. V., Sheremet, E. M., Esipchuk, K. E., & Antsife­rov, V. A. (2009). Geological and geophysical model of the Nemirovsko-Kocherovska suture zone of the Ukrainian Shield. Donetsk: Weber.

17. Antsiferov, A. V., Sheremet, E. M., Glevassky, E. B., Kulik, S. N., & Esipchuk, K. E. (2008). Geological and geophysical model of the Holovanev suture zone of the Ukrainian Shield. Donetsk: Weber 32.

18. Gintov, O. B., & Pashkevich, I. K. (2010). Tectonophysical analysis and geodynamic interpretation of the three-dimensional geophysical model of the Ukrainian Shield. Geophysical Journal, 2(32), 6-27. https://doi.org/10.24028/gzh.0203-3100.v32i2.2010.117553.

19. Baisarovich, M. M., Velikanov, V. Y., Gursky, D. S., Gozhik, P. F., Yatsipchuk, K. Y., …, & Ryabenko, V. A. (2005). Lithosphere of Ukraine. Atlas. Kyiv: UkrDGRI.

20. Gordienko, V., Gordienko, I. V., Zavgorodnyaya, O. V., Kovachi­ko­va, S., Logvinov, I. M., Peck, J., …, & Usenko, O. V. (2006). Dnieper-Donetsk depression (geophysics, depth processes). Kyiv: Korvin Press.

21. Gordienko, V. V., Gordienko, I. V., Zavgorodnyaya, O. V., Kovachikova, S., Logvinov, I. M., Tarasov, V. M., & Usenko, O. V. (2005). Ukrainian Shield (geophysics, deep processes). Кyiv: Corvinus Press.

22. Krasovsky, S. S., Kuprienko, P. Ya., & Krasovsky, A. S. (2001). Power diagrams of the layers of the consolidated crust of the Ukrainian Shield, DVV and Donbass. Theory and practice of geological interpretation of gravitational, magnetic, and electric fields. OIFZ RAS, 52-54.

23. Marchenko, A. N. (2000). Earth’s radial density profiled based on Gauss’ and Roche’s distributions. Bolletino di Geodesia e Scienze Affini, Anno LIX, 3, 201-220.

24. Marchenko, A. N., & Zayats, O. (2011). Estimation of the gravitational potential energy of the earth based on different density models. Studia Geophysica et Geodaetica, 55(1), 35-54. https://doi.org/10.1007/s11200-011-0003-8.

25. Karato, S. I. (1993). Importance of anelasticity in the interpretation of seismic tomography. Geophysical Research Letters, 20, 1623-1626. https://doi.org/10.1029/93GL0176.

26. Karato, S. I. (1998). A Dislocation Model of Seismic Wave Attenuation and Micro-creep in the Earth: Harold Jeffreys and the Rheology of the Solid Earth. Pure and Applied Geophysics, 153, 239-256. https://doi.org/10.1007/s000240050195.

27. Gassmoller, R., Dannberg, J., Bangerth, W., Heister, T., & Myhill, R. (2020). On formulations of compressible mantle convection. Geophysical Journal International, 221, 1264-1280. https://doi.org/10.1093/gji/ggaa078.

28. ASPECT: Advanced Solver for Planetary Evolution, Convection, and Tectonics (n.d.). Retrieved from http://aspect.geodynamics.org.

29. Shcherbak, M. P., Gurskyi, D. S., & Glevasskyi, E. B. (2000). Precambrian geology and magmatism of the Ukrainian shield: collection of science works. Editorial board: Institute of Geochemistry, Mineralogy and Ore Formation of the National Academy of Sciences of Ukraine, Department of Geology and Subsoil Use of the MEPR of Ukraine.

30. Claesson, S., Artemenko, G., Bogdanova, S., & Shumlyanskyy, L. (2019). Archean crustal evolution in the Ukrainian shield. In: Earth’s oldest rocks, second edition. van Kranendonk, M. J., Bennett, V., Hoffmann, E. (Eds.), pp. 837-854. Elsevier.

31. Shumlyanskyy, L., Tsymbal, S., Kusiak, M., Wilde, S. A., Nemchin, A. A., Tarasko, I., Shumlianska, L., & Hofmann, M. (2021). U-Pb age and Hf isotope systematics of zircon from eclogite xenoliths in Devonian kimberlites: Preliminary data on the Archaean roots in the junction zone between the Sarmatian and Fennoscandian segments of the East European Platform. Geosciences, 11, 487. https://doi.org/10.3390/geosciences11120487.

32. Gordienko, V. V., Gordienko, I. V., Zavgorodnyaya, O. V., Logvinov, I. M., & Usenko, O. V. (2004). Geothermal Atlas of Ukraine. Kyiv.

33. Kruglov, S.S., & Gursky, D.S. (2007). Tectonic Map of the Ukraine. Retrieved from https://www.geokniga.org › maps.

34. Starostenko, V., Janik, T., Lysynchuk, D., …, & Tolkunov, A. (2013). Mesozoic (?) lithosphere-scale buckling of the East European Craton in southern Ukraine: DOBRE-4 deep seismic profile. Geophysical Journal International, 195(2), 740-766. https://doi.org/10.1093/gji/ggt292.

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