eEarth Discussions www.electronic-earth-discuss.net 1815-3836 1815-3844 4 2 2009 10.5194/eed-4-77-2009 http://www.electronic-earth-discuss.net/4/77/2009/ http://www.electronic-earth-discuss.net/4/77/2009/eed-4-77-2009.html http://www.electronic-earth-discuss.net/4/77/2009/eed-4-77-2009.pdf 77 89 2009-09-29 Thermogeodynamic manifestations in the Caucasus and their genesis G. E. Gugunava J. K. Kiria T. B. Bochorishvili Institute of Geophysics, Georgian Academy of Sciences, Rukhadze St 1, 0193 Tbilisi, Georgia Institute of Informatics, University of Podlasie, 3-go Maja 54, 08-110 Siedlce, Poland In the work two aspects of thermal character are considered: first of all this is the connection of subduction phenomena with thermal life of the Caucasus on the basis of over interpreted data of magnetotelluric sounding, and secondly, origin of thermostressed condition of the Caucasus and its geological aspects which is manifested in the following: <br><br> 1. in the zones of anomalous thermodisplacements thermofaults should occur (Le Pishon et al., 1977). These thermofaults are in good correlation with deep faults which are distinguished by geological and seismic methods, these thermofaults may be earthquake sources (Spitak, Racha, etc. earthquakes), also may be channels through which magma derivates (giving mineral deposits) may penetrate on surface (Gugunava and Gijeishvili, 1989); <br><br> 2. in the body of sedimentary complex thermostressed seals and seal failures occur, which are apparently traps for oil-gas fluids. Good correlation of thermodense anomalies with oil deposits of the Caucasus is shown (Alexidze et al., 1985; Gugunava, 1980). <br><br> Everything above mentioned was carried out within frames of stationary thermal model which did not allow us to reveal time characteristics of interconnection of geological medium and thermal field. <br><br> Now investigations are being carried out within the frames of stationary thermal model and its interconnection with geological environment. Alexidze M. A., Gugunava, G. E., Kiria, J. K., and Chelidze, T. L.: Thermal model, crustal inversional layer and young volcanism of the Caucasus, Bulletin of the Georgian Academy of Sciences, 113, 517–521, 1985. Alexidze, M. A., Gugunava, G. E., Kiknadze, D. A., Kiria, J. K., and Chelidze, T. L.: Geothermal model of the Caucasus and crustal astenosphere, in: Proceedings of the International Conference on Gepthermal Model of Geological Structures and Crustal Astenosphere, St-Peterburg, Russia, 91–96, September 1991. Alexidze, M. A., Gugunava, G. E., Kiria, J. K., and Chelidze, T. L.: A three-dimensional geothermal stationary model of thermal and thermoelastic fields of Caucasus Erratum, Tectonophysics, 227, 191–203, 1993. Gugunava, G. E.: On construction of geoelectric model of the upper mantle of the Caucasus, Bulletin of the Georgian Academy of Sciences, 100, 89–92, 1980. Gugunava G. E. and Gijeishvili S. O.: About possible thermoelastic nature of Spitak earthquake, Thesis in: regional conf. Sverdlovsk, Russia, 44~pp., 1989. Gugunava, G. E.: On thermoelastic mechanism of oil-gas migration, Bulletin of the Georgian Academy of Sciences, 150, 58–63, 1994. Gugunava, G. E.: On thermoelastic mechanisms of genesis of oil fields region and method of their reveal, Journal of Georgian Geophysics Society Issue (A), Physics of solid earth, 1, 116–119, 1995. Gugunava, G. E., Kiria, J. K., Gogiashvili, J. V., and Kiknadze, D. A.: On genesis of Shamkori, Spitak and Racha-Java earthquakes, Journal of the Georgian Geophysical Society Issue (A), 11, 63–68, 2006. Hain, V. N.: Regional geotectonics (Alpine Mediterranean Belt), Nedra, Moscow, 181–188, 1984. Hasebe K., Fujii N., and Uyeda S.: Thermal processes under island arcs, Tectonophysics, 10, 335–355, 1970. Le Pishon, K., Franshto, J., and Bonnin, J.: Plate tectonics, edited by: Karasik, A. M., Hain, V. N., MIR, Moscow, 201–204, 1977. McKensie, P.: Temperature and potential temperature beneath island arcs, Tectonophysics, 10, 357–366, 1970. Sholpo V. N.: Alpine geodynamics of the Greater Caucasus, Nedra, Moscow, 1978. Sikharulidze, D. I.: The Earth structure according to surface waves, edited by: Gotsadze, O. D., Metsniereba, Tbilisi, 75–78, 1978.