Geodynamical Evolution of the Earth’s Crust of Central Asia and Recent Geodynamics of the Kopet Dag Region, Turkmenistan

Abstract—Current problems of combining the results of mathematical modeling for the geodynamical evolution of the Earth’s crust in Central Asia with the instrumental data on recent surface deformations of the Earth obtained by the geodetic monitoring systems in the Northern Iran and South Turkmenistan are discussed. Based on the integrated analysis of the data obtained in the Northern Iran and Southern Turkmenistan, the annual average strain rates are estimated and their amplitudes are found to range within (10–8–10–9) yr–1. It is concluded that over the past 55 years, the interaction region between the Iranian and Turanian plates within the Peredovoi Kopet Dag fault (Ashkhabad fault) has been in the state of quasi static (soft) regional loading. The obtained strain-rate and tilt estimates are analyzed in comparison against the reference geodynamical process—the Earth’s tide. It is established that the average strain rate in a seismically active region is equal to or less than 1–2 amplitudes of Earth’s tidal strains per year. It is demonstrated that the modeling results of geodynamical processes cannot serve as a substitute for the real-time instrumental observations of the vertical and horizontal surface displacements of the Earth.

This is a preview of subscription content, access via your institution.

We’re sorry, something doesn't seem to be working properly.

Please try refreshing the page. If that doesn't work, please contact support so we can address the problem.

Fig. 1.
Fig. 2.
Fig. 3.
Fig. 4.

REFERENCES

  1. 1

    Allen, M., Jacson, J., and Walker, R., Late Cenozoic reorganization of the Arabia—Eurasia collision and the comparison of short-term and long-term deformations rates, Tectonics, 2004, vol. 23, no. 2, pp. 1–16.

    Google Scholar 

  2. 2

    Atabekov, I.U., Earth Core’s stresses variation in Central Asian earthquakes region, Geod. Geodyn., 2020, vol. 11, no. 4, pp. 293–299. https://doi.org/10.1016/j.geog.2019.12.005

    Article  Google Scholar 

  3. 3

    Izyumov, S.F. and Kuzmin, Yu.O., Study of the recent geodynamic processes in the Kopet-Dag region, Izv. Phys. Solid Earth, 2014, vol. 50, no. 6, pp. 719–731.

    Article  Google Scholar 

  4. 4

    Kalugin, P.I., Yuzhnyi Kopetdag (geologicheskoe opisanie) (Southern Kopet-Dag: Geological Description), Ashkhabad: Ylym, 1977.

  5. 5

    Kuzikov, S.I. and Mukhamediev, S.A., Structure of the present-day velocity field of the crust in the area of the Central-Asian GPS network, Izv. Phys. Solid Earth, 2010, vol. 46, no. 7, pp. 584–601.

    Article  Google Scholar 

  6. 6

    Kuzmin, Yu.O., Recent geodynamics of the faults and paradoxes of the rates of deformation, Izv. Phys. Solid Earth, 2013, vol. 49, no. 5, pp. 626–642.

    Article  Google Scholar 

  7. 7

    Kuzmin, Yu.O., Recent geodynamics of a fault system, Izv. Phys. Solid Earth, 2015, vol. 51, no. 4, pp. 480–485.

    Article  Google Scholar 

  8. 8

    Kuzmin, Yu.O., Paradoxes of the comparative analysis of ground-based and satellite geodetic measurements in recent geodynamics, Izv. Phys. Solid Earth, 2017, vol. 53, no. 6, pp. 825–839.

    Article  Google Scholar 

  9. 9

    Kuzmin, Yu.O., Recent geodynamics of tensile faults, Izv. Phys. Solid Earth, 2018, vol. 54, no. 6, pp. 886–903.

    Article  Google Scholar 

  10. 10

    Kuzmin, Yu.O., Recent geodynamics: from crustal movements to monitoring critical objects, Izv. Phys. Solid Earth, 2019a, vol. 55, no. 1, pp. 65–86.

    Article  Google Scholar 

  11. 11

    Kuzmin, Yu.O., Induced deformations of fault zones, Izv. Phys. Solid Earth, 2019b, vol. 55, no. 5, pp. 753–765.

    Article  Google Scholar 

  12. 12

    Kuzmin, Yu.O., Recent geodynamics and slow deformation waves, Izv. Phys. Solid Earth, 2020, vol. 56, no. 4, pp. 595–603.

    Article  Google Scholar 

  13. 13

    Nilforoushan, F., Masson, F., Vernant, P., et al., GPS network monitors the Arabia-Eurasia collision deformation in Iran, J. Geod., 2003, vol. 77, no. 7, pp. 411–422.

    Article  Google Scholar 

  14. 14

    Saberi, E., Yassaghi, A., and Djamour, Y., Application of geodetic leveling data on recent fault activity in Central Alborz, Iran, Geophys. J. Int., 2017, vol. 211, no. 2, pp. 773–787.

    Article  Google Scholar 

  15. 15

    Trifonov, V.G., Late Quaternary tectonic movements of western and central Asia, Geol. Soc. Am. Bull., 1978, vol. 89, pp. 1059–1072.

    Article  Google Scholar 

  16. 16

    Vernant, P., Nilforoushan, F., Hatzfeld, D., et al., Present-day crustal deformation and plate kinematics in the Middle East constrained by GPS measurements in Iran and northern Oman, Geophys. J. Int., 2004, vol. 157, no. 1, pp. 381–398.

    Article  Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to Yu. O. Kuzmin.

Additional information

Translated by M. Nazarenko

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Kuzmin, Y.O. Geodynamical Evolution of the Earth’s Crust of Central Asia and Recent Geodynamics of the Kopet Dag Region, Turkmenistan. Izv., Phys. Solid Earth 57, 131–139 (2021). https://doi.org/10.1134/S1069351321010055

Download citation

Keywords:

  • recent geodynamics
  • lithospheric plates
  • Kopet Dag region
  • vertical and horizontal surface displacements
  • strain rate