Results of experimental electromagnetic studies of the Crimean region
DOI:
https://doi.org/10.24028/gzh.0203-3100.v38i2.2016.107765Ключові слова:
experimental electromagnetic studies, anomalies of conductivity, the Earth's crust and upper mantle, the Crimean regionАнотація
Spatial-temporal pattern of distribution of geomagnetic variations and the electric field on the Earth’s surface was obtained as a result of the modern experimental observations conducted in 2007—2013 along 9 profiles (48 points) by the methods of magnetotelluric sounding (MTS) and magnetovariation profiling (MVP). These profiles cross various geological structures of the Crimean region. It is possible to estimate the value of the electrical conductivity and vertical and horizontal geoelectric structure. The processing of these data is done using modern software system PRC_MTMV (author Varentsov Iv. M.) that provides the common noise-protected evaluation of the impedance, tipper, horizontal magnetovariation response according to the synchronous MT/MV records.
The main result of qualitative interpretation of geoelectric research is the detection of high conductivity regions in the Earth's crust and upper mantle of the Crimea, that are characterized by the variations of conductivity, depth and configuration. They characterize the various geological structures differently. The subvertical conductive zones often coincide with the fault structures, most of these objects are confined to the suture zones between tectonic elements such as the East European platform and the Scythian plate, the Scythian plate and the Crimea mountain, North and South Kerch zone. This fact may reflect the high permeability of the suture zones for deep fluids in the process of their formation.
Some high conductivity anomalies are well-described in the literature and are known. For example, the unique Tarhankut conductivity anomaly, located not only on the eponymous peninsula of Crimea, but also under the water area of the north-western part of the Black sea. This anomaly was detailed and precised and involves a complex multi-level deep structure of the region. In addition, the structurally complex conductivity anomaly is assumed in the Sivash graben and the Kerch Peninsula.
Although the qualitative interpretation of the experimental data of magnetotelluric sounding (MTS) and magnetovariation profiling (MVP) provides the inconsistent understanding of the depth distribution of the Crimean region electrical conductivity, the combination of these methods allows to construct the model of the resistivity distribution within a three-dimensional environment much more accurately and adequately to the observed experimental data.
Посилання
Aleksanova E. D., Varentsov Iv. M., Kulikov V. A., Logvinov I. M., Lozovskiy I. N., Pushkarev P. Yu, Sokolova E. Yu., Tarasov V. N., Shustov N. L., Yakovlev A. G., 2013. Deep conductivity anomaly in the northern part of the Voronezh anticline. Geofizika (2), 32—38 (in Russian).
Berdichevskiy M. N., Dmitriev V. I., 2009. Models and methods of magnetotelluric. Moscow: Nauchnyy Mir, 680 p. (in Russian).
Bugayenko I. V., Shumlanskaya L. A., Zayets L. N., Tsvetkova T. A., 2008. Three-dimensional P-velocity model of the mantle of the Black Sea and the surrounding area. Geofizicheskiy zhurnal 30(5), 145—160 (in Russian).
Burakhovich T. K., Varentsov Iv. M., Gordienko V. V., Kulik S. N., Logvinov I. M., 1987. On the nature of the anomaly Tarkhankut. Geofizicheskiy zhurnal 9(5), 50—58 (in Russian).
Burakhovych T. K., Kushnir A. M., 2015. Conductivity distribution in the interior of the Crimean region. Proceedings of the XIV Int. Conf. on Geoinformatics. Theoretical and applied aspects, May 11—14, 2015, Kiev, Ukraine (in Ukrainian). http://www.earthdoc.org/publication/publicationdetails/?publication=80196.
Burakhovich T. K., Kushnir A. M., Nikolaev I. Yu., Tsvetkova T. A., Shirkov B. I., 2015. Integrated Interpretation of geoelectric and seismic tomography models to estimate geodynamic processes in the lithosphere of the Crimea. Proceedings of the VII All-Russian school-seminar on behalf of electromagnetic soundings of the Earth behalf M. N. Berdichevsky and L. L. Vanyan, Irkutsk, 2015 (in Russian). [Electronic publication]. Access mode: http://www.conf.nsc.ru/ems2015/ru/ems2015_doklady.
Burakhovych T. K., Kushnir A. M., Tsvetkova T. O., Shumlyans'ka L. O., 2013. Complex interpretation of seismic tomography and geoelectric models to estimate geodynamic processes in the lithosphere of the Crimea. Naukovi pratsi UkrNDMI NAN Ukrayiny (13), 12—26 (in Ukrainian).
Buryanov V. B., Gordienko V. V., Zavgorodnyaya O. V., Kulik S. N., Logvinov I. M., 1985. Geophysical model tectonosphere Ukraine. Kiev: Naukova Dumka, 212 p. (in Russian).
Varentsov Iv. M., 2013. PRC_MTMV software system for processing data synchronous MT/MB soundings. Proceedings of the VI All-Russian school-seminar on behalf of electromagnetic soundings of the Earth behalf M. N. Berdichevsky and L. L. Vanyan, Novosibirsk, 2013. (in Russian). [Electronic publication]. Access mode: http://emf.ru/ems2013/section1/Варенцов.pdf.
Gordienko V. V., Gordienko I. V., Zavgorodnyaya O. V., Logvinov I. M., Tarasov V. N., Usenko O. V., 2004. Geothermal Atlas of Ukraine. Kiev: IG NASU Publ., 60 p. (in Russian).
Lukin A. E., 2006. Basic laws of formation of oil and gas deposits in the Black Sea region. Geologiya i poleznye iskopayemye Mirovogo okeana (3), 10—21 (in Russian).
Kulik S. N., Burakhovich T. K., 1984. Deep magnetotelluric sounding Tarkhankut peninsula. Doklady AN USSR (12), 15—18 (in Russian).
Kulik S. N., Burakhovich T. K., 1992. Quasi three-dimensional geoelectric model tectonosphere Crimea. Geofizicheskiy zhurnal 21(3), 123—126 (in Russian).
Orlyuk M. I., Sumaruk T. P., Sumaruk Yu. P., Romenets A. O., 2014. Valuation of induction current contribution to the secular variation of geomagnetic field (according to the data of Ukrainian geomagnetic observatories). Geofizicheskiy zhurnal 36(2), 111—120 (in Ukrainian).
Pristay A. N., Pronenko V. A., Korepanov V. E., Ladanivskiy B. T., 2014. Role of electrical measurements at deep magnetotelluric sounding of the Earth. Geofizicheskiy zhurnal 36(6), 173—182 (in Russian).
Rokityanskiy I. I., 1975. Studies conductivity anomalies by magnetovariational profiling. Kiev: Naukova Dumka, 279 p. (in Russian).
Rokityanskiy I. I., Tereshin A. V., Tregubenko V. I., Golubtsova N. S., Ingerov A. I., Savchenko T. S., 2012. Review of observations by MVP-MTS in the southern part of the Kirovograd electrical conductivity anomaly and an experiment of thin film modeling of the Ukrainian Shield structure. Geofizicheskiy zhurnal 34(3), 92—101 (in Russian).
Sollogub V. B., Chekunov A. V., 1975. Deep structure and evolution of the earth's crust. In: Problems of Earth Physics in the Ukraine. Kiev: Naukova Dumka, P. 118—141 (in Russian).
Tikhonenkov E. P., 1997. Main features of Geodynamics of the Crimean seismically active regions. Geodynamics of the Crimean Black Sea Region: Proceedings of the conference. Simferopol, P. 35—41 (in Russian).
Tectonic Map of the Ukrainian SSR and the Moldavian SSR, 1988. 1: 500 000. Ch. Ed. V. V. Glushkov. Kiev: UkrNIGRI, GAP Ukrgeologiya (in Russian).
Tkachev G. N., Sviridenko I. A., 1978. Some results DMS in Crimea. In: Electromagnetic research. Kiev: Naukova Dumka, P. 92—97 (in Russian).
Tsvetkova T. A., Shumlyanskaya L. A., Bugayenko I. V., 2012. Fluids ultradeep East European platform. Geological environment, mineragenic and seismotectonic processes: XVIII International Conference (September 24—29, 2012). Voronezh: Nauchnaya Kniga, P. 392—395 (in Russian).
Yurovskiy Yu. G., 1997. Seismicity and fluid migration Kerch-Taman region: Proceedings of the conference. Simferopol, P. 133—134 (in Russian).
Kutas R. I., Kobolеv V. P., Tsvyashchenko V. A., 1998. Heat flow and geothermal modl of the Black sea depression. Tectonophysics 291, 91—100.
Neal S. L., 1998. Variations in the electrical conductivity of the upper mantle beneath North America and the Pacific Ocean. MS Thesis, Indiana University, Bloomingdale.
Schmucker U., 1970. Anomalies of geomagnetic variations in the south-western United States. Bull. Scripps Inst. Oceanogr. 13, 1—165.
Semenov V. Yu., Jozwiak W., 1999. Model of the geoelectrical structure of the mid- and lower mantle in the Europe-Asia region. Geophys. J. Int. 138, 549—552.
Semenov V. Yu., Kulik S. N., Logvinov I. M., 1996. Estimations of the geoelectrical structure of the mantle in Ukraine. Доп. НАН України (12), 134—137.
Tarits P., 1986. Conductivity and fluids in oceanic mantle. Phys. Earth Planet. Int. 42(4), 215—222.
Omura K., 1991. Change of Electrical conductivity of olivine associated with olivine-spinel transition. Phys. Earth Planet. Int. 65, 292—307.
Varentsov Iv. M., 2007. Array of simultaneous EM soundings: design, data processing and analysis. In: Electromagnetic sounding of the Earth’s interior (Methods in geochemistry and geophysics, 40). Amsterdam: Elsevier. P. 259—273.
Watson E. B., Brenan J. M., 1987. Fluids in the lithosphere, 1. Experimentally-determined wetting characteristics of CO2-H20 fluids and their implications for fluid transport, host-rock physical properties, and fluid inclusion formation. Earth Planet. Sci. Lett. 85, 497—515.
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