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Geotectonics

, Volume 52, Issue 6, pp 647–657 | Cite as

Deep Structure, Volcanic and Seismic Activity Regime in Elbrus Region

  • E. A. RogozhinEmail author
  • M. Yu. Stepanova
  • Yu. V. Kharazova
  • A. V. Gorbatikov
Article
  • 13 Downloads

Abstract

According to obtained results of profiling by microseismic sounding method along the line in submeridional direction crossing the eastern cone of the Elbrus volcano and a magmatic chamber was found under the Elbrus volcano in the range of depths of 7‒13 km below sea level with horizontal size of ≈ 7 km. At the depths of 18‒40 km, a narrow linear magmatic focus steeply dipping in the southern direction is deduced, its horizontal size in the cross section is ≈5 km underlain by another magmatic focus at the depths of 45‒55 km, penetrating the upper mantle. The found magmatic chamber and earthquake center in the crust section are formed by isometric and linear low-velocity bodies. The sections of two profiles show deep faults correlated with morphological features revealed on the surface. To the south of Tyrnyauz town at the depths of 17‒40 km below sea level, a low-speed steeply sinking in the northern direction linear body was found and interpreted as cool volcanic channel approximately at the size of Elbrus. Having carried out geophysical research we obtained data on 7 ancient earthquakes with magnitude M = 6.5‒7.0 occurred over past 7000 years in the vicinity of the volcano. In that historic period five strong eruptions of Elbrus volcano had happened. We settled the absence of time commonality in activations of volcanism and seismicity. Currently Elbrus volcano is in a phase of deep seismic abate. In 2004‒2017 we have fulfilled geological, geophysical and paleoseismological research that confirms Elbrus is not completely extinct volcano.

Keywords:

Elbrus volcano deep structure seismic and volcanic regime microseismic sounding 

Notes

ACKNOWLEDGMENTS

The study was supported by the Russian Foundation for Basic Research (project no. 18-05-00641).

REFERENCES

  1. 1.
    M. V. Avdulov and N. V. Koronovsky, “On the geological nature of Elbrus gravity minimum,” Vestn. Mosk. Gos. Univ. Ser. 4. Geol., No. 3, 32–39 (1993).Google Scholar
  2. 2.
    O. A. Bogatikov, A. G. Gurbanov, E. A. Rogozhin, A. L. Sobisevich, I. V. Melekestsev, V. K. Milyukov, and V. M. Gazeev, “The problem of Elbrus volcano activation and its possible consequences,” in Catastrophic Processes and Their Impacts on the Natural Environment, Vol. 1: Volcanism, Ed. by N. P. Laverov (Reg. Obshchestv. Organ. Uchenykh Probl. Prikl. Geofiz., Moscow, 2002), pp. 346–364.Google Scholar
  3. 3.
    O. A. Bogatikov, A. G. Gurbanov, I. V. Melekestsev, L. E. Sulerzhitskii, L. E. Sobisevich, D. M. Katov, A. V. Kopaev, O. V. Lyashenko, and A. I. Puriga, “The problem of activation of Elbrus volcano (Northern Caucasus) and its possible consequences,” in Global Changes of Natural Environment, Ed. by N. L. Dobretsov and V. I. Kovalenko (Sib. Otd. Ross. Akad. Nauk, Novosibirsk, 1998), pp. 153–164.Google Scholar
  4. 4.
    O. A. Bogatikov, I. V. Melekestsev, A. G. Gurbanov, L. D. Sulerzhitskii, D. G. Koshchug, R. V. Gryun, V. I. Chernykh, M. M. Arakelyants, V. Yu. Kir’yanov, V. M. Gazeev, A. A. Gurbanov, A. I. Puriga, and A. V. Trusov, “Catastrophic activity of the Elbrus volcanic center (North Caucasus, Russia) in the Pleistocene and Holocene: Events and chronology based on radiocarbon, EPR, and K–Ar dating,” Vulkanol. Seismol., No. 2, 3–17 (2001).Google Scholar
  5. 5.
    O. A. Bogatikov, E. A. Rogozhin, A. G. Gurbanov, A. V. Marakhanov, A. V. Spiridonov, A. V. Shevchenko, and E. E. Burkanov, “Ancient earthquakes and volcanic eruptions in the Elbrus region,” Dokl. Earth Sci. 390, 524–528 (2003).Google Scholar
  6. 6.
    A. V. Gorbatikov, E. A. Rogozhin, M. Yu. Stepanova, Yu. V. Kharazova, N. V. Andreeva, F. V. Perederin, V. B. Zaalishvili, D. A. Mel’kov, B. V. Dzeranov, B. A. Dzeboev, and A. F. Gabaraev, “The pattern of deep structure and recent tectonics of the Greater Caucasus in the Ossetian sector from the complex geophysical data,” Izv., Phys. Solid Earth 51, 26–37 (2015).CrossRefGoogle Scholar
  7. 7.
    A. V. Gorbatikov, M. Yu. Stepanova, and G. E. Korablev, “Microseismic field affected by local geological heterogeneities and microseismic sounding of the medium,” Izv., Phys. Solid Earth 44, 577–592 (2008).CrossRefGoogle Scholar
  8. 8.
    A. V. Gorbatikov and A. A. Tsukanov, “Simulation of the Rayleigh waves in the proximity of the scattering velocity heterogeneities. Exploring the capabilities of the microseismic sounding method,” Izv., Phys. Solid Earth 47, 354–370 (2011).CrossRefGoogle Scholar
  9. 9.
    State Geological Map of Russian Federation, Scale 1 : 200 000. Caucasian Series, Sheets K-38-I, VII (Kislovodsk), Ed. by N. L. Anna (Kavkazgeols”emka, St. Petersburg, 2004), 2nd ed. [in Russian].Google Scholar
  10. 10.
    I. I. Grekov, V. N. Arbuzkin, G. V. Litovko, and E. A. Trofimenko, “Tectonodynamic of the Elbrus–Kyugen volcanic area, Central Caucasus,” in Modern Methods of Geological-Geophysical Monitoring of Natural Processes in the Kabardino-Balkar Republic, Ed. by B. S. Karamurzov (Reg. Obshchestv. Organ. Uchenykh Probl. Prikl. Geofiz., Moscow, 2005), pp. 83–93.Google Scholar
  11. 11.
    A. G. Gurbanov, O. A. Bogatikov, B. S. Karamurzov, A. B. Leksin, V. M. Gazeev, A. E. Tsukanova, A. V. Shevchenko, and S. M. Dolov, “Assessment of the present-day state of Elbrus dormant volcano by the complex of geological-geophysical and remote sensing methods. The developed technique of monitoring central-type dormant volcanoes: Case study of Elbrus (Kabardino-Balkar Republic, Russia),” Vestn. Vladikavkaz. Nauchn. Tsentra 13 (14), 36–50 (2013).Google Scholar
  12. 12.
    S. G. Kornienko, O. V. Lyashenko, A. G. Gurbanov, A. L. Sobisevich, A. B. Leksin, and D. V. Likhodeev, “Problems of monitoring of peripheral magmatic chambers beneath Elbrus volcano based on the thermal remote sensing data Caucasus,” in Modern Methods of Geological-Geophysical Monitoring of Natural Processes in the Kabardino-Balkar Republic, Ed. by B. S. Karamurzov (Reg. Obshchestv. Organ. Uchenykh Probl. Prikl. Geofiz., Moscow, 2005), pp. 266–276.Google Scholar
  13. 13.
    N. V. Koronovsky, “Elbrus is an active volcano,” Priroda, No. 8, 42–52 (1985).Google Scholar
  14. 14.
    N. V. Koronovsky, M. S. Myshenkova, I. S. Utkin, S. A. Fedotov, and L. I. Utkina, “Upper Pleistocene–Holocene lava flows of Elbrus and density of surface heat flow,” in Geological-Geophysical Investigations of Caucasus Deep Structure. Geology and Geophysics of Caucasus: Contemporary Challenges and Study Methods, Ed. by V. B. Zaalishvili (Geofiz. Inst. Vladikavkaz. Nauchn. Tsentr Ross. Akad. Nauk, Vladikavkaz, 2017), pp. 101–107.Google Scholar
  15. 15.
    N. P. Laverov, N. L. Dobretsov, O. A. Bogatikov, V. G. Bondur, A. G. Gurbanov, B. S. Karamurzov, V. I. Kovalenko, I. V. Melekestsev, Yu. V. Nechaev, V. V. Ponomareva, E. A. Rogozhin, A. L. Sobisevich, L. E. Sobisevich, S. A. Fedotov, A. P. Khrenov, and V. V. Yarmolyuk, “Volcanic hazard in the northern Caucasus region,” in Recent and Contemporary Volcanism in the Territory of Russia, Ed. by N. P. Laverov (Nauka, Moscow, 2005), pp. 336–442.Google Scholar
  16. 16.
    D. V. Likhodeev, S. M. Dolov, A. V. Shevchenko, Z. I. Dudarov, and N. Kh. Bogotov, “On the problem of determining the temperature at the top of the magmatic chamber of Elbrus volcano,” Izv. Kabard.-Balkar. Gos. Univ. 4 (4), 12–18 (2014).Google Scholar
  17. 17.
    D. V. Likhodeev and V. N. Mikhalenko, “Temperature at the top of the magmatic chamber of Elbrus volcano,” Geofiz. Issled. 13 (4), 70–75 (2012).Google Scholar
  18. 18.
    A. A. Malovichko, I. P. Gabsatarova, D. V. Likhodeev, A. S. Zaklyukovskaya, and D. A. Presnov, “Development of multiscale seismic monitoring system in the Elbrus volcano region,” Seism. Instrum. 51, 259–266 (2015).CrossRefGoogle Scholar
  19. 19.
    Yu. P. Masurenkov, A. L. Sobisevich, D. V. Likhodeev, and A. V. Shevchenko, “Thermal anomalies of the Northern Caucasus,” Dokl. Earth Sci. 429, 1318–1321 (2009).CrossRefGoogle Scholar
  20. 20.
    E. A. Rogozhin, A. V. Gorbatikov, M. Yu. Stepanova, A. N. Ovsyuchenko, N. V. Andreeva, and Yu. V. Kharazova, “The structural framework and recent geodynamics of the Greater Caucasus Meganticlinorium in the light of new data on its deep structure,” Geotectonics 49, 123–134 (2015).CrossRefGoogle Scholar
  21. 21.
    E. A. Rogozhin, A. V. Gorbatikov, Yu. V. Kharazova, M. Yu. Stepanova, and A. V. Nikolaev, “Deep structure and volcanic activity of Mount Elbrus and a portion of the Elbrus–Tyrnyauz valley: Geological and geophysical data,” Dokl. Earth Sci. 471, 1213–1216 (2016).CrossRefGoogle Scholar
  22. 22.
    A. L. Sobisevich, Yu. V. Nechaev, V. N. Arbuzkin, E. A. Trofimenko, N. I. Prutskii, and I. I. Grekov, “New geophysical data on the structure of igneous units in the area of the Elbrus volcanic center,” in Investigations in Geophysics, Ed. by A. O. Gliko (Ob”ed. Inst. Fiz. Zemli Ross. Akad. Nauk, Moscow, 2004), pp. 272–285.Google Scholar
  23. 23.
    V. G. Trifonov, O. V. Soboleva, R. V. Trifonov, and G. A. Vostrikov, Contemporary Geodynamics of the Alpine–Himalayan Collisional Belt (GEOS, Moscow, 2002) [in Russian].Google Scholar
  24. 24.
    Glaciation of Elbrus, Ed. by E. S. Tushinskii (Mosk. Gos. Univ., Moscow, 1968) [in Russian].Google Scholar
  25. 25.
    I. V. Chernyshev, V. A. Lebedev, S. N. Bubnov, M. M. Arakelyants, and Yu. V. Gol’tsman, “Stages of magmatic activity in the Elbrus volcanic center (Greater Caucasus): Evidence from isotope-geochronological data,” Dokl. Earth Sci. 380, 884–852 (2001).Google Scholar
  26. 26.
    W. B. Caldwell, S. L. Klemperer, S. S. Rai, and J. F. Lawrence, “Partial melt in the upper middle crust of the northwest Indian Himalaya revealed by Rayleigh wave dispersion,” Tectonophysics 477, 58–65 (2009).CrossRefGoogle Scholar
  27. 27.
    International Seismological Centre, Thatcham, UK, On-line Bulletin, 2015. http://www.isc.ac.uk. Accessed January 30, 2018.Google Scholar
  28. 28.
    V. Milyukov, E. Rogozhin, A. Gorbatikov, A. Mironov, A. Myasnikov, and M. Stepanova, “Contemporary state of the Elbrus volcanic center (The Northern Caucasus),” Pure Appl. Geophys. 175, 1889–1907 (2018). doi 10.1007/s00024-017-1595-xCrossRefGoogle Scholar
  29. 29.
    E. A. Rogozhin, A. G. Gurbanov, A. V. Marakhanov, A. N. Ovsyuchenko, A. V. Spiridonov, and E. E. Burkanov, “Ancient earthquake dislocations in the area of Elbrus volcano, North Caucasus,” Russ. J. Earth Sci. 6 (4), 3–11 (2004).Google Scholar
  30. 30.
    T. Watanabe, “Effects of water and melt on seismic velocities and their application to characterization of seismic reflectors,” Geophys. Res. Lett. 20, 2933–2936 (1993).CrossRefGoogle Scholar
  31. 31.
    D. L. Wells and K. J. Coppersmith, “New empirical relationships among magnitude, rupture length rupture width, rupture area, and surface displacement,” Bull. Seismol. Soc. Am. 84, 974–1002 (1994).Google Scholar

Copyright information

© Pleiades Publishing, Inc. 2018

Authors and Affiliations

  • E. A. Rogozhin
    • 1
    Email author
  • M. Yu. Stepanova
    • 1
  • Yu. V. Kharazova
    • 1
  • A. V. Gorbatikov
    • 1
  1. 1.Schmidt Institute of Physics of the Earth, Russian Academy of SciencesMoscowRussia

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