Deep structure and geodynamic peculiarities of the earth crust of the western coast of the Caspian sea
The article presents 2D gravity model of the geodynamic profile of Samur—Baku, located on the western coast of the Caspian Sea and the geodynamic characteristics of the earth crust in the profile region are studied. 2D gravity model is made by the matching method of density boundaries. The boundaries of the lower layer of crust (28—32 km) and the Moho surface (47—57 km) are specified. Along the profile, the velocity curves of modern vertical and horizontal motions are analyzed. On the curve of velocities of modern vertical motions on the boundary of the rise and fall of the earth’s crust, places of stress accumulation zones along the profile were identified. Modern vertical motions of the earth’s crust show that along the profile the main stress accumulation zones are located in the immediate vicinity of the points Khudat, Charkhi, Siazan and Baku. The average deformation velocity between two GPS points was calculated by dividing the velocities difference to the distance between these points. It is established that the zone of the highest deformation velocity (97,5 nanostrain/year) coincides with the zone of the Siazan fault, the zone of the Gusar-Shabran edge trough is characterized by a velocity of 22,3 nanostrain/year. The low deformation velocity (8,9 nanostrain/year) coincides with the zone of the Shamakhi-Gobustan synclinorium. These zones of stress accumulation in the gravity model coincide with the protrusions along the surface of the upper and lower layers of the consolidated crust and marked by hypocenters of earthquakes. The values of the radii of foci of earthquakes that create additional perceptible stresses that affect the geodynamic conditions of the earth crust in the profile region are determined.
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Abdullaev, R. A., & Dzhafarov, Kh. D., (1962). Geological and geophysical characteristics of the Caspian oil-bearing region of Azerbaijan. Baku: Azerneshr (in Russian).
Amiraslanov, T. S. (1986). Interpretation of gravitational anomalies of complex oil and gas regions on the basis of complex analysis of geophysical fields (on the example of Azerbaijan and the adjacent water area). Extended abstract of Doctors thesis. Baku (in Russian).
Akhmedbеyli, F. S., Mamedov, A. V., Shirinov, N. Sh., & Shihalibeyli, E. Sh. (1991). Neotectonic map of Azerbaijan. Scale 1:500 000. Aerogeodesy (in Russian).
Akhmedbeyli, F. S., Isayeva, M. I., Kadirov, F. A., & Korobanov, V. V., (2010). Geodynamics of the neotectonic stage of the Caucasian segment of the Alpine-Himalayan orogenic belt. Baku: Nafta-press (in Russian).
Andreev, B. A., & Klushin, I. G., (1965). Geological interpretation of gravity anomalies. Leningrad: Nedra (in Russian).
Bulakh, Ye. G., (1999). Review of works on methods of minimization in inverse problems of gravimetry and magnetometry. Geofizicheskiy zhurnal, 21, (4), 5—19 (in Russian).
Bulakh, Ye. G., (2010). Direct and inverse gravimetry and magnetometry. Mathematical methods of geological interpretation of gravimetric and magnetometric data. Kiev: Naukova Dumka (in Russian).
Bulakh, Ye. G., & Markova, M. N., (1992). Solution of inverse problems of gravimetry by the selection method. Geofizicheskiy zhurnal, 14, (4), 9—19 (in Russian).
Bulakh, Ye. G., Markova, M. N., Timoshenko, V. I., & Boyko, P. D., (1984). Mathematical Support of the Automated System for the Interpretation of Gravitational Anomalies. Kiev: Naukova Dumka (in Russian).
Babaev, D. Kh., & Gadzhiev, A. N., (2006). Deep structure and prospects of oil and gas potential of the Caspian Sea basin. Baku: Trust «Caspomorneftegeofizravedka» (in Russian).
Zeynalov, A. M. (Ed.). (1996). Geophysical research in Azerbaijan. Baku: Sharg-Garb (in Russian).
Khain, V. E., Alizade, Ak. A. (Eds.). (2005). Geology of Azerbaijan, Vol. IV. Tectonics. Baku: Nafta Press (in Russian).
Gadzhiev, R. M. (1965). Deep geological structure of Azerbaijan. Baku: Azerneshr, 1965 (in Russian).
Gadzhiev, R. M., Kadirov, F. A., Kadyrov, A. G., & Kunstman, V. V., (1987). Detection of hidden periodicities in the modern vertical movement of the Earth’s crust on the profile of Ulan Hol—Baku—Astara. Izvestiya Akademii Nauk Azerbaydzhanskoy SSR, Seriya Nauk o Zemle, (1), 57—62 (in Russian).
Dobrovolsky, I. P., (2009). Mathematical theory of preparation and forecast of a tectonic earthquake. Moscow: Fizmatlit (in Russian).
Demenitskaya, R. M., (1967). Bark and mantle of the Earth. Moscow: Nedra (in Russian).
Egorov, A. S., (2004). Deep structure and geodynamics of the lithosphere of Northern Eurasia (based on the results of geological and geophysical modeling along geotraverses in Russia). St. Petersburg: Publishing house VSEGEI (in Russian).
Ermakov, A. P., & Lygin, I. V., (2006). Features of joint seismic and gravity modeling along the depth seismic sounding (DGS) profiles. Rossiyskiy geofizicheskiy zhurnal, (43-44), 17—23 (in Russian).
Kadirov, F. A., (2000). Gravitational field and models of the deep structure of Azerbaijan. Baku: Nafta Press (in Russian).
Kadirov, F. A., & Safarov, R. T., (2013). Crustal deformation of the Azerbaijan Earth’s and surrounding territories derived from GPS measurements. Izvestiya NAN Azerbaydzhana. Nauki o zemle, (1), 47—55 (in Russian).
Kasyanova, N. A., (2003). Ecological risks and geodynamics. Moscow: Nauchnyy Mir (in Russian).
Kozlenko, M. V., & Kozlenko, Yu. V., (2016). Gravitational modeling of the lithosphere of the central part of the Crimean-Black Sea region. Geologiya i poleznyye iskopayemyye Mirovogo okeana, (3), 5—17 (in Russian).
Kozlenko, M. V., & Kozlenko, Yu. V., (2013). Structure and development of the eastern part of northwestern shelf of the Black Sea (according to the results of geophysical data interpretation along II profile of CMRW). Geofizicheskiy zhurnal, 35(4), 63—74. doi: https://doi.org/10.24028/gzh.0203-3100.v35i4.2013.111420 (in Russian).
Krasnopevtseva, G. V., (1978). Deep structure of the Caucasus. In The structure of the earth's crust and upper mantle of Central and Eastern Europe (pp. 190—199). Kiev: Naukova Dumka (in Russian).
Lilienberg, D. A., (1980). Experience of complex mapping of modern geodynamics (on the example of the Azerbaijan SSR). In Modern movements of the earth’s crust. Theory, methods, forecast. Results of studies on international geophysical projects (pp. 65—76). Moscow: Nauka (in Russian).
The report «Results of complex geological and geophysical studies conducted in 2014—2017 with the aim of studying the deep geological-tectonic structure of the Gusar-Shabran seismically active zone», (2018). Funds of the Ministry of Ecology and Natural Resources of Azerbaijan. Baku (in Russian).
Pavlenkova, N. I., Yegorova, T. P., Starostenko, V. I., & Kozlenko, V. G., (1991). Three-dimensional density model of the lithosphere of Europe. I. Izvestiya AN SSSR. Fizika Zemli, (4), 3—13 (in Russian).
Puchkov, V. N., (2000). Paleogeodynamics of the Southern and Middle Urals. Ufa: Gilem (in Russian).
Ryazantsev, P. A., & Kosheleva, N. V., (2017). Density 2D modeling of the Paleoproterozoic South Onega trough. Proceedings of the Karelian Research Center of the Russian Academy of Sciences, (2), 86—95 (in Russian).
Safarov, I. B., (2011). Petrophysical models of lithospheric plates of continents and oceans. Baku: Elm (in Russian).
Starostenko, V. I., Kuprienko, P. Ya., Makarenko, I. B., & Legostaeva, O. V., (2008). Density model of the Earth‘s crust along the DOBRE profile. Geofizicheskiy zhurnal, 30(1), 28—41 (in Russian).
Starostenko, V. I., Pashkevich, I. K., Makarenko, I. B., Kuprienko, P. Ya., & Savchenko, A. S., (2017). Geodynamical interpretation of the geological and geophysical heterogeneity of the Dnieper-Donets basin lithosphere. Dopov. Nac. akad. nauk Ukr., (9), 84—94 (in Russian).
Terkot, D., & Schubert, D. Zh. (1985). Geodynamics: Geological Applications of Continuum Physics. Vol. 2. Moscow: The World (in Russian).
Ozerskaya, M. L., & Podoba, N. V. (Eds.). (1967). Physical properties of the sedimentary cover of the USSR: Handbook. Moscow: Nedra (in Russian).
Khain, V. E., (1979). West-Siberian young plate (megasinekliza). In Regional geotectonics. Extralpine Asia and Australia (pp. 55—68). Moscow: Nedra (in Russian).
Khain, V. E., & Ahmedbeyli, F. S., (1957). Geological structure and development of the Kusaro-Divichinsky sinklinoriya. In Materials on the Geology of North-Eastern Azerbaijan (pp. 183—385). Baku: Publ. AS Azer. SSR (in Russian).
Shengelaya, G. Sh., (1978). Gravitational model of the Earth's crust of the Caucasus. Moscow: Nauka (in Russian).
Yashchenko, V. R., (1989). Geodesic investigations of vertical movements of the Earth's crust. Moscow: Nedra (in Russian).
Yashchenko, V. R., (1974). Modern vertical movements of the Western Caspian region according to the data of repeated leveling. Geodeziya i kartografiya, (2), 24—25 (in Russian).
Ali-Zade, A. A., Agabekov, M. G., Shekinskiy, E. M., & Shikhalibeyli, E. Sh., (1982). Tectonic map of Azerbaijan. Leningrad: The Ministry of geology of the USSR.
Jackson, J., (1992). Partitioning of strike-slip and convergent motion between Eurasia and Arabia in eastern Turkey and the Caucasus. Journal of Geophysical Research, 97(B9), 12471—12479. https://doi.org/10.1029/92JB00944.
Kadirov, F. A., (2004). Gravity model of lithosphere in the Caucasus-Caspian Region, (in) South Caspian Basin. In Geology, geophysics, oil and gas content (pp. 107—123). Baku: Nafta Press.
Kadirov, F. A., (2011). Report on scientific-research work on «Modern geodynamics of Azerbaijan and seismic hazard (based on GPS, seismic and geophysical data)». Foundation of the Institute of Geology and Geophysics of ANAS.
Kadirov, F. A., & Gadirov, A. H., (2014). A gravity model of the deep structure of South Caspian Basin along submeridional profile Alborz—Absheron Sill. Global and Planetary Change, 114, 66—74. doi:10.1016/j.gloplacha.2013.09.001.
Kadirov, F., Floyd, M., Alizadeh, A., Guliev, I., Reilinger, R., Kuleli, S., King, R., & Toksoz, M. N., (2012). Kinematics of the eastern Caucasus near Baku, Azerbaijan. Natural Hazards, 63(2), 997—1006. doi:10.1007/s11069-012-0199-0.
Kadirov, F. A., Floyd, M., Reilinger, R., Alizadeh, Ak. A., Guliyev, I. S., Mammadov, S. G., & Safarov, R. T., (2015). Active geodynamics of the Caucasus Region: Implications for earthquake hazards in Azerbaijan. Proceedings of Azerbaijan National Academy of Sciences, The Sciences of Earth, (3), 3—17.
Kadirov, F., Mammadov, S., Reilinger, R., McСlusky, S., (2008). Global Positioning System measurements of tectonic deformation in Azerbaijan. In New constraints on active faulting and earthquake hazards (pp. 82—88). The Sciences of the Earth. Proc. Azerb. Nat. Acad. Sci.
McKenzie, D. P., (1972). Active tectonics of the Mediterranean region. Geophysical Journal International, 30(2), 109—185. https://doi.org/10.1111/j.1365-246X.1972.tb02351.x
Masson, F., Van Gorp, S., Chery, J., Djamour, Y., Tatar, M., Tavakoli, F., Nankali, H., & Vernant, P., (2006). Extension in NW Iran Driven by the Motion of the South Caspian Basin. Earth and Planetary Science Letters, 252(1-2), 180—188. doi: 10.1016/j.epsl.2006.09.038.
Nilforoushan, F., Masson, F., Vernant, P., Vigny, C., Martinod, J., Abbassi, … Chéry, J., (2003). GPS network monitors the Arabia-Eurasia collision deformation in Iran. Journal of Geodesy, 77(7-8), 411—422. doi: 10.1007/s00190-003-0326-5.
Pitarka, A., Gok, R., Yetirmishli, G., Ismayilova, S., & Mellors, R., (2016). Ground Motion Modeling in the Eastern Caucasus. Pure and Applied Geophysics, 173(8), 2791—2801. doi: 10.1007/s00024-016-1311-2.
Philip, H., Cisternas, A., Gviskiani, A., & Gorshkov, A., (1989). The Caucasus: An actual example of the initial stages of continental collision. Tectonophysics, 161(1-2), 1—21. https://doi.org/10.1016/0040-1951(89)90297-7.
Reilinger, R. S., McClusky, S., Vernant, P., Lawrence, S., Ergintav, S. Cakmak, R., … Karam, G., (2006). GPS constraints on continental deformation in the Africa-Arabia-Eurasia continental collision zone and implications for the dynamics of plate interactions. Journal of Geophysical Research, 111, BO5411. doi:10.1029/ 2005JB004051.
Sengor, A. M. C., Gorur, N., & Saroglu, F., (1985). Strike-slip faulting and related basin formation in zones of tectonic escape: Turkey as a case study. In K. T. Biddle, & N. Christie-Blick (Eds.), Strike-slip Faulting and Basin Formation (pp. 227—264). Society of Econ. Paleont. Min. Sec. Pub.
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