Genesis of tangential mass forces caused by reorientation of the generalized figure of the lithosphere

Earth Surface Processes & Geodynamics

Authors

First and Last Name Academic degree E-mail Affiliation
Anatoliy Tserklevych Sc.D. anatolii.l.tserklevych [at] lpnu.ua National university Lviv polytechnic
Lviv, Ukraine
Olha Shylo No olha.m.shylo [at] lpnu.ua National university Lviv polytechnic
Lviv, Ukraine
Yevhenii Shylo Ph.D. yevhenii.o.shylo [at] lpnu.ua National university Lviv polytechnic
Lviv, Ukraine

I and my co-authors (if any) authorize the use of the Paper in accordance with the Creative Commons CC BY license

First published on this website: 24.08.2023 - 11:22
Abstract 

The study of the problem of formation of additional planetary stresses in the lithosphere from the action of tangential distributed mass forces has become relevant in geodynamics. The presence of a deviation of the plumb line from the normal to the surface of the solid Earth determines the appearance of TMF acting in the upper shell of the Earth. Due to the change in the orientation of the ellipsoid describing the lithosphere, an updated field of potential horizontal forces is formed, which, according to the conservation of the momentum of motion, move lithospheric masses and generate stresses and strains in the lithospheric shell. The reorientation of the lithospheric shell has shown that a deformation field of lateral displacements is formed on its surface. In our opinion, this is one of the likely factors of the process that triggers global movements of lithospheric blocks.  The peculiarities of the connection between the directions of the TMF vector field and the directions of movement of permanent GNSS stations and the directions of movement of the GSRM model velocities of the continents are detailed. The results of the study make it possible to more reliably interpret the features of the TMF distribution. These forces can trigger trigger mechanisms for discharging accumulated stresses, which is important for studying seismicity.

References 

Bercovici D. (2007). Mantle Dynamics Past, Present, and Future: An Introduction and Overview. In Treatise on Geophysics. Elsevier. V. 7. P. 1–30.

Coltice, N., Husson, L., Faccenna, C., & Arnould, M. (2019). What drives tectonic plates. Science advances, 5(10), aax4295. DOI: 10.1126/sciadv.aax4295.

Forsyth D. & Uyeda S. (1975). On the relative importance of the driving forces of plate motion. Geophys. J.R. Astron. Soc. V. 43. 163–200.

Kreemer, C., Holt, W. E., & Haines, A. J. (2003). An integrated global model of present-day plate motions and plate boundary deformation. Geophysical Journal International, 154(1), 8-34.

Koptev, A. Y., & Ershov, A. V. (2010). Rol hravytatsyonnoho potentsyala lytosferы v formyrovanyy hlobalnoho polia napriazhenyi. Fyzyka Zemly, (12), 66-81.

Rebetsky Yu.L. (2016). On the possibility of the existence of small tangential mass forces in the lithosphere. Their role in tectonics and geodynamics. Geodynamics & Tectonophysics, 691-704. DOI: 10.5800/GT-2016-7-4-0229.

Trubitsyn V.P. (2019). Problems of global geodynamics. Earth Physics, 180-198. DOI: https://doi.org/10.31857/S0002-333720191180-198

Tserklevych, A., Zaiats, O. & Shylo, Ye. (2016). Aproksymatsiia vysot fizychnoi poverkhni Zemli dvovisnym i tryvisnym elipsoidamy . Heodynamika.(1). S. 40-49.

Tserklevych A., & Shylo Ye. (2018). Figure of the Earth's lithosphere and geotectonics. Reports of the National Academy of Sciences of Ukraine, 67-72. doi: https://doi.org/10.15407/dopovidi2018.01.067

Tserklevych, A.L., Zayats, O.S. & Shylo, Y.O. (2017). Dynamics of the Earth shape transformation Kinematics and Physics of Celestial Bodies. 33(3). P.130-141.

Turcotte, D., & Schubert, G. (2002). Geodynamics. Cambridge: Cambridge University Press.

Tyapkin K.F. & Dovbnych M.M. (2009). New rotational hypothesis of structure formation and its geological and mathematical justification: monograph. Donetsk: Knowledge.