The structure of the Kerch peninsula and north-eastern part of the Black sea crust according to the results of local seismic tomography

Автор(и)

  • V. Gobarenko S.I. Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Україна
  • T. Yegorova S.I. Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Україна
  • R. Stephenson

DOI:

https://doi.org/10.24028/gzh.0203-3100.v36i2.2014.116115

Ключові слова:

Black Sea, the Kerch Peninsula, seismological inversion, petrological composition of the crust

Анотація

Local seismic tomographic study has been conducted according to the data of 200 weak earthquakes occurred in 1975-2010 and registered by seven seismic stations in the area of the Kerch peninsula and adjacent northern part of the Black Sea. Application of Backus-Gilbert method for the three-dimensional case allowed to study the velocity structure by P- and S-waves at the depths of 15-40 km and to calculate the ratio VP/VS. Two high velocity blocks have been revealed in the middle and lower crust of the region. The first one includes the P-velocity anomaly of the Kerch peninsula in the area of the western part of the Indol-Kuban trough. The other one is characterized by the S-velocity anomaly of the Shatsky swell and the Tuapse depression. The third high-velocity domain situated in the Black sea water area to the south from the Kerch peninsula belongs most probably to the uppermost mantle that underlie the thin sub-oceanic crust of the East-Black sea basin. Performed petrologic and geodynamic interpretation of the obtained anomalies makes possible to conclude the presence of active processes of thrusting the sub-oceanic crust of the East-Black sea basin under the continental crust of the Scythian plate and the southern part of the East-European platform. The transition area is controlled by a zone of high seismic activity, where the earthquake foci deepen northward that can be an additional evidence of on going underthrusting processes in the study region.

Посилання

Adamija Sh., ChabakuaniA., MikeladzeZ., 2007. Correlation of major tectonic and sedimentary structures of the eastern Black Sea and Caucasus — Eastern Pontida. In: Distressed geodynamics, petrology and metallogeny Caucasus. Baku: Nafta-Press, P. 36—49 (in Russian).

Antonova L. M., Gobarenko V S., 1997. Heterogeneous structure of the crust southern Crimean peninsula and adjacent areas of the Black Sea by the travel times of P-and 5-waves. Fizika Zemli (8), 57—64 (in Russian).

Afanasenkov A. P., NikishinA. M., Obuhov A. N., 2007. Geological structure and hydrocarbon potential of the Eastern Black Sea region. Moscow: Nauchnyj Mir, 172 p. (in Russian).

Baranova E. P., Egorova T. P., Omel'chenko V. D., 2008. Reinterpretation of seismic data and gravity modeling DSS on profiles 25, 28 and 29 in the Black and Azov Seas. Geofizicheskij zhurnal 30(5), 124—144 (in Russian).

Gobarenko V S., Nikolova S. B., Janovskaja T. B., 1986. Structure of the upper mantle of Southeastern Europe, Asia Minor and the Eastern Mediterranean from the data on residuals of travel times of P-waves. Izvestija AN SSSR. Fizika Zemli (8), 15—23 (in Russian).

Gobarenko V. S., Janovskaja T., 1983. Study of horizontal inhomogeneities in the structure of the upper mantle of the Sayano-AItai region. Izvestija AN SSSR. Fizika Zemli (4), 21—35 (in Russian).

Gobarenko V. S., Janovskaja T. B., 2011. Velocity structure of the upper floors of the Black Sea basin mantle. Geofizicheskij zhurnal 33(3), 62—74 (in Russian).

Yegorova T. P., Gobarenko V. S., Janovskaja T. B., Baranova K.P., 2012. Structure of the lithosphere of the Black Sea on the results of the analysis of 3D gravity and seismic tomography. Geofizicheskij zhurnal 34(5), 38—59 (in Russian).

Yegorova T. P, Starostenko V. I., Kozlenko V. G., Ulini- emi Ju., 2003. Lithosphere Ukrainian shield and Pri- pyat trough region EUROBRIDGE-97 according to the gravity modeling. Geofizicheskij zhurnal 25(4), 26—58 (in Russian).

Krylov S. V., BryksinA. V., Ten E. N., 1990. The elastic properties of silicate minerals and crystalline rocks for the isotropic model. Geologija i geofizika 12, 101—112 (in Russian).

Pustovitenko B. G., 2002. Mechanisms significant earthquakes Crimean Black Sea region over the last 20 years. Seysmol. Bull. Ukraine for2000. Sevastopol: EKOSI-Gidrofizika, P. 59—64 (in Russian).

Halevin N. I., 1980. Transverse waves in the explosion seismologists. In: Study lithosphere and astheno- sphere on long profiles DSS. Moscow: IPE AS USSR Publ., P. 173—198 (in Russian).

Chekunov A. V., Pustovitenko B. G., Kul'chickij V. E., 1996. Distribution of foci and the energy distribution of lesions in depth. Seismicity of the Black Sea region. In: Geophysical parameters of the lithosphere of the southern sector of the Alpine Orogen. Kiev: Naukova Dumka, P. 101—106 (in Russian).

Adamia S., Alania V., Chabukiani A., Chichua A., Enukidze O., Sadradze N., 2010. Evolution of the Late Cenozoic basins of Georgia (SW Caucasus)). In: Sedimentary Basin Tectonics from the Black Sea and Caucasus to the Arabian Platform. London: Spec. Publ. Geol. Soc. Vol. 340, P. 239—260.

Christensen N. I., 1996. Poisson's ratio and crustal seismology. J. Geophys. Res. 101, 3139—3156.

DalyE., KeirD., Ebinger C. J., Stuart G. W., BastowI. D., Ayele A., 2008. Crustal tomographic imaging of a transitional continental rift: the Ethiopian rift. Geo- phys. J. Int. (172), 1033—1048.

Finetti I., Bricchi G., Del Ben A., Pipan M., Xuan Z., 1988. Geophysical study of the Black Sea. Bolletinodi Geofisica Teorica ed Applicata XXX(117—118), 197—324.

Gee D. G., Stephenson R. A., 2006. European lithosphere - an introduction. In: European Lithosphere Dynamics. London: Memoirs Geol. Soc. Vol. 32, P. 1—9.

Gobarenko V. S., Nikolova S. B., Yanovskaya T B., 1987. 2-D and 3-D velocity patterns in southeastern Europe, Asia Minor and the Eastern Mediterranean from seismological data. Geophys. J. Res. Astr. Soc. 90, 473—484.

Holbrook W. S., Mooney W. D., Christensen N. I., 1992. The seismic velocity of the deep continental crust. In: Continental Lower Crust. New York: Elsevier, P. 1—34.

Kuo-Chen H., Wu F T., Jenkins D. M., Mechie J., Wang C.-Y, Huang B.-S., 2012. Seismic evidence for the a-ß quartz transition beneath Taiwan from Vp/Vs Tomography. Geophys. Res. Lett. 39(L22302). doi:10.1029/2012GL053649.

Liu M.-J., Li S.-L., Fan S.-M., Zhao L., 2008. Study on crustal composition and geodynamics using seismic velocities in the northeastern margin of the Tibetan Plateau. Chinese J. Geophys. 52(2), 275—297.

Musacchio G., Mooney W. D., Luetgert J. H., Christensen N. I., 1997. Composition of the crust in the Grenville and Appalachian Provinces of North America inferred from VJVs ratios. J. Geophys. Res. 102, (B7), 15,225—15,241.

Rudnik R. L., Fountain D. M., 1995. Nature and composition of the continental crust: a lower crustal perspective. Rev. Geophys. 33, 267—309.

Saintot A., Stephenson R., Stovba S., Brunet M.-F., Ye- gorova T., Starostenko V., 2006. The evolution of the southern margin of the Eastern Europe (Eastern European and Scythian platforms) from latest Pre- cambrian-Early Palaeozoic to the Early Cretaceous. In: The European Lithosphere Dynamics. London : Memoirs Geol. Soc. Vol. 32, P. 48—505.

Shillington D. J., White N., Minshull T. A., Edwards G. R. H., Jones S., Edwards R. A., Scott C. L., 2008. Cenozoic evolution of the eastern Black Sea: A test of depth-dependent stretching models. Earth Planet. Sci. Lett. 265, 360—378. doi:10.1016/j. epsl.2007.10.033.

Sosson M., Rolland Y., Müller C., Danelian T., Mel- konyan R., Kekelia S., Adamia S., Babazadeh V., Kangarli T., AvagyanA., Galoyan G., MosarJ., 2010. Subductions, abduction and collision in the Lesser Caucasus (Armenia, Azerbaijan, Georgia), new insights. In: Sedimentary Basin Tectonics from the Black Sea and Caucasus to the Arabian Platform. London: Spec. Publ. Geol. Soc. Vol. 340, P. 329—352.

Starostenko V. I., Buryanov V., Makarenko I., Rusa- kov O., Stephenson R., Nikishin A., Georgiev G., Gerasimov M., Dimitriu R., Legostaeva O., Pchela- rov V., Sava C., 2004. Topography of the crust-mantle boundary beneath the Black Sea Basin. Tectonophy- sics 381, 211—233.

Starostenko V., Janik T., Stephenson R., Gryn D., Tolku- nov A., Czuba W., Sroda P., Lysynchuk D., Omelchenko V., Grad M., Kolomiyets K., Thybo H., Legostaeva O., 2012. Integrated seismic studies of the crust and upper mantle at the southern margin of the East European Craton (Azov Sea-Crimea-Black Sea area), DOBRE-2 & DOBRE'99 transect. The 15th International Symposium on Deep Seismic Profiling of the Continents and Their Margins. Programme and Abstracts, Beijing, China, September 16—20, 2012. P. 85.

Stephenson R. A., Mart Y., Okay A., Robertson A., Saintot A., Stovba S. M., Hhriachtchvskaia O., 2004. TRANSMED Transect VIII: Eastern European Craton-Crimea-Black Sea-Anatolia-Cyprus-Levant Sea-Sinai-Red Sea. In: The TRANSMED Atlas: The Mediterranean Region from Crust to Mantle. Berlin: Springer. Verlag. Vol XXXIII, P. 120—127.

Stephenson R., Schellart W.P., 2010. The Black Sea back- arc basin: insights from geodynamic models and modern analogues. In: Sedimentary Basin Tectonics from the Black Sea and Caucasus to the Arabian Platform. London: Spec. Publ. Geol. Soc. Vol. 340, P. 11—21.

Wagner L. S., Beck S., Zandt G., 2005. Upper mantle structure in the central Chilean subduction zone (30° to 36 °S). J. Geophys. Res. 110(B01308). doi:10.1029/2004JB003238.

Yegorova T. P., Baranova E. P., Omelchenko V. D., 2010. The crustal structure of the Black Sea from reinterpretation of Deep Seismic Sounding data acquired in the 1960s. In: Sedimentary Basin Tectonics from the Black Sea and Caucasus to the Arabian Platform. London: Spec. Publ. Geol. Soc. Vol. 340, P. 43—56.

Yegorova T., Gobarenko V., 2010. Structure of the Earth's crust and upper mantle of West- and East-Black Sea Basins revealed from geophysical data and its tectonic implications. In: Sedimentary Basin Tectonics from the Black Sea and Caucasus to the Arabian Platform. London: Spec. Publ. Geol. Soc. Vol. 340, P. 23—42.

Yegorova T., Gobarenko V., Yanovskaya T., 2013. Lithosphere structure of the Black Sea from 3-D gravity analysis and seismic tomography. Geophys. J. Int. 193, 287—303.

##submission.downloads##

Опубліковано

2014-04-01

Як цитувати

Gobarenko, V., Yegorova, T., & Stephenson, R. (2014). The structure of the Kerch peninsula and north-eastern part of the Black sea crust according to the results of local seismic tomography. Геофізичний журнал, 36(2), 18–34. https://doi.org/10.24028/gzh.0203-3100.v36i2.2014.116115

Номер

Розділ

Статті