MORPHOSTRUCTURE OF THE KODAR-UDOKAN SECTION OF THE BAIKAL RIFT ZONE
Abstract
The morphostructure of the region is a natural result of active geodynamics in the eastern Stanovoe Upland. Extreme seismic conditions become apparent in rare devastating earthquakes (up to 10-11 in the Mercally scale), as well as in frequent slight ones. Seismic events affect topography and produce seismic deformations of different scale and morphology. Areal disturbances (like the New Namarakit Lake in the South-Muya Mountains origin) and, more often, local deformations (like destructions of the Kodar ridge rocky saddles or clamms [gorges] opening) are evident. Using morphotectonic analysis methods the morphostructural scheme of the Kodar-Udocan section of the Baikal rift zone (perhaps pull-apart basin) is done. In our model piedmont and mountain territories are divided in five level groups of blocks. Neotectonic movements’ amplitude is estimated at 5000 m.
About the Authors
Andrey A. Lukashov
Faculty of Geography, Lomonosov Moscow State University, Russia
Russian Federation
Russian Federation
Stepan V. Maznev
Faculty of Geography, Lomonosov Moscow State University, Russia
Russian Federation
Russian Federation
References
1. Active tectonics, volcanoes, and seismicity of the Stanovoe Upland (1966) / Editor-in-Chief V.P. Solonenko. - Moscow: Nauka. 232 p. (In Russian).
2. Earthquakes in Russia in 2004 (2007). - Obninsk: GS RAN. - 140 p. (In Russian).
3. Earthquakes in Russia in 2007 (2009). - Obninsk: GS RAN. - 220 p. (In Russian).
4. Enikeev F.I. (2009) Pleistocene glaciations of the Eastern Transbaikalie and South-East of Middle Siberia // Geomorphology, №2, 2009, pp. 33-49. (In Russian).
5. Explanatory dictionary of English geological terms (2002). Vol. 2 / Editor-in-Chief J.A. Jackson. - Moscow: MCGK “Geocart”, GEOS. 644 p. (In Russian).
6. Geology and seismicity of the Baykal-Amur Mainline zone (1984). - Novosibirsk: Nauka. 174 p. (In Russian).
7. Giljova N.A., Radziminovch Ya.B., Melnikova V.I., Radziminovch N.A. (2010) The Chara-III earthquake on June 28, 2004 with MSPS = 4,7, Kp = 13,5, I0 = 6 (Pribaikalje) // Earthquakes of northern Eurasia in 2004, pp. 324-334. (In Russian).
8. Grachev A.F. (1972) Asymmetry of the Baikal rift zone (geophysical solution of geomorphologic problem) // Geomorphology and geophysics, pp. 95-106. (In Russian).
9. Kovalenko N.V. (2011) Behavior and evolution of small glacier forms. - Moscow: MAKS Press. 240 p. (In Russian).
10. Logachev N.A. (2003) History and geodynamics of the Baikal rift // Geology and Geophysics, vol. 44, №5, pp. 391-406. (In Russian).
11. Lopatin D.V. (1972) Geomorphology of the eastern part of the Baikal rift zone - Novosibirsk: Nauka. 116 p. (In Russian).
12. New seismic zoning map of the Nothern Eurasia (1996) / Khromovskikh V.S., Nikolaev V.V., Demjanovich M.G. et al. // Geophysical research in Eastern Siberia at the point of the 21st century - Novosibirsk: Nauka. Siberian publishers of RAS. P. 94-99. (In Russian).
13. Petit C., Burov E., Tiberi C. (2008) Strength of the lithosphere and strain localization in the Baikal rift // Earth and Planetary Science Letters, v. 269. P. 523-529.
14. Simonov Yu.G. (1972) Regional geomorphologic analysis. - Moscow: Moscow University Publishers, 1972. 254 p. (In Russian).
15. Ufimcev G.F. (2002) Morphotectonics of Eurasia- Irkutsk: Irkutsk State University Publishers, 2002. 494 p. (In Russian).
16. Zorin Yu.A., Turutanov E.H. (2005) Plums and geodynamics of the Baikal rift zone // Geology and Geophysics, vol. 46, №5, pp. 685-700. (In Russian).
Review
For citations:
Lukashov A.A., Maznev S.V. MORPHOSTRUCTURE OF THE KODAR-UDOKAN SECTION OF THE BAIKAL RIFT ZONE. GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY. 2014;7(1):39-51. https://doi.org/10.24057/2071-9388-2014-7-1-39-51
Views: 535
Email this article 