Science and technological developments: article

A.N. Shevtsov A.E. Hannibal T.G. Korotkova A.A. Skorokhodov
Geological Institute of the Federal Research Center “Kola Science Center of the Russian Academy of Sciences”
Journal: Science and technological developments
Tome: 101
Number: 1
Year: 2022
Pages: 36-50
UDK: 550.837.61+550.837.63+550.837.211
DOI: 10.21455/std2022.1-3
Keywords: conductivity, frequency sounding, CSAMT, FFT, impedance, apparent resistivity, static shift
Аnnotation: At the stages of the FENICS experiment, conducted in 2014 and 2019, unique data of deep electromagnetic sounding of grounded sections of industrial power lines were obtained at distances from 180 to 940 km from the center of the supply line to the measuring installation. The components of the electromagnetic field were recorded by measuring equipment VMTU-10 (VEGA LLC, St. Petersburg). In this case, current fluctuations in the sup-ply line were recorded as a time series with a sampling frequency of 1 kHz. Based on the synchronous time series of the field components at the observation points and the current strength in the supply vibrator, estimates of the power spectra of the autocorrelation and cross-correlation functions of the recorded values were calculated based on the fast Fourier transform (FFT). The resulting spectral characteristics were used to determine the amplitudes of the source field components and the phase shifts between them, as well as to estimate the components of the impedance tensor. To do this, correction factors were calculated for the ratio of the apparent resistivity values for the horizontal component of the magnetic field to the apparent resistivity values for the impedance and electric field. A two-dimensional interpretation is performed and estimates of the distribution of resistivity in depth are obtained for two profiles of the submeridional and sublatitudinal directions of the Karelian-Kola region
Bibliography: Barannik, M.B., Danilin, A.N., Efimov, B.V., Kolobov, V.V., Prokopchuk, P.I., Selivanov, V.N., Shevtsov, A.N., Kopytenko, Yu.A., Zhamaletdinov, A.A., High-voltage power inverter of the generator “Energy-2” for electromagnetic soundings and monitoring of the earthquake source zones, Seismic Instruments, 2010, vol. 46, iss. 1, pp. 49–61.

Berdichevsky, M.N., Dmitriev, V.I., Modeli i metody magnitotelluriki (Models and methods of magnetotellurics), Moscow, Nauchny mir, 2009, 680 p. [in Russian]. Constable, S.C., Parker, R.L., Constable, C.G., Occam inversion: A practical algorithm for generating smooth models from EM sounding data, Geophysics, vol. 52, no. 3, pp. 289–300.

Fisher, N.I., Statistical Analysis of Circular Data, Cambridge, University Press, 1993, 277 p.

Glaznev, V.N., Kompleksnye geofizicheskie modeli litosfery Fennoskandii (Complex geophysical models of the lithosphere of Fennoscandia), Apatity, KiM, 2003, 252 p. [in Russian].

Hannibal, A.E., Software for processing primary data in the FENICS experiment, Seismic Instruments, 2021, vol. 57, iss. 3, pp. 287–291. Key, K., MARE2DEM: a 2-D inversion code for controlled-source electromagnetic and magnetotellric data, Geophys. J. Int., 2016, vol. 207, iss. 1, pp. 571–588.

Kolobov, V.V., Barannik, M.B., Analysis of inductor filter of high-power high-voltage single-phase inverter using different pulse-width modulation techniques, Trudy Kol'skogo nauchnogo tsentra RAN. Energetika (Transactions of the Kola Scientific Center of the Russian Academy of Sciences. Energy Technology), 2018, no. 3 (16), pp. 106–114. [in Russian].

Kolobov, V.V., Kuklin, D.N., Shevtsov, A.N., Zhamaletdinov, A.A., The KVVN-7 multifunction digital measuring station for electromagnetic monitoring of seismoactive zones, Seismic Instruments, 2012, vol. 48, no. 1, pp. 75–84.

Kolobov, V.V., Barannik, M.B., Zhamaletdinov, A.A., Generatorno-izmeritel'nyi kompleks “Energiya” dlya elektromagnitnogo zondirovaniya litosfery i monitoringa seismoaktivnykh zon (Energia generator-measuring complex for electromagnetic sounding of the lithosphere and monitoring of seismically active zones), St. Petersburg, SOLO, 2013, 240 p. [in Russian].

Kolobov, V.V., Barannik, M.B., Efimov, B.V., Zhamaletdinov, A.A., Shevtsov, A.N., Kopy-tenko, Yu.A., Energy-4 generator for monitoring seismically active regions and electromagnetic sounding of the Earth’s crust: Experience of application in the Kovdor-2015 experiment, Seismic Instruments, 2018, vol. 54, no. 3, pp. 268–280.

Pollack, H.N., Hurter, S.J., Johnson, J.R., A New Global Heat Flow Compilation, Department of Geological Sciences, University of Michigan, 1991. URL:

Shevtsov, A.N., Zhamaletdinov, A.A., Kolobov, V.V., Barannik, M.B., Frequency electromagnetic sounding with industrial power lines on the Karelian-Kola geotraverse, Zapiski Gornogo instituta (Journal of Mining Institute), 2017, vol. 224, pp. 178–188. [in Russian].

Shevtsov, A.N., Zhamaletdinov, A.A., Kolobov, V.V., Barannik, M.B., Selivanov, V.N., The FENICS-2014 experiment on deep sounding of the Earth’s crust using two mutually orthogonal power lines and the results of in-depth data processing on the Upoloksha-Syamozero profile, Trudy Kol'skogo nauchnogo tsentra RAN (Proceedings of the Kola Scientific Center of the Russian Academy of Sciences), 2019, vol. 10, no. 5–18, pp. 20–39. [in Russian].

Shevtsov, A.N., Barannik, M.B., Gannibal, A.E., Gorokhov, O.Yu., Zhamaletdinov, A.A., Ivo-nin, V.V., Kazakov, B.V., Kolobov, V.V., Korotkova, T.G., Skorokhodov, A.A., Streltsov, S.V., Preliminary results of the experiment “FENICS-2019”, Trudy Fersmanovskoi nauchnoi sessii GI KNTs RAN (Proceedings of the Fersman scientific session of the GI KSC RAS), 2020, no. 17, pp. 558–562. [in Russian].

Tereshchenko, E.D., Barannik, M.B., Grigoriev, V.F. Ivonin, V.V., Kolobov, V.V., Milichenko, A.N., Prokopchuk, P.I., Selivanov, V.N., Development of matching unit for stationary extremely low frequency transmitter, Trudy Kol'skogo nauchnogo tsentra RAN. Energetika (Transactions of the Kola Scientific Center of the Russian Academy of Sciences. Energy Technology), 2012, no. 1 (8), pp. 68–77. [in Russian].

Zhamaletdinov, A.A., Model' elektroprovodnosti litosfery po rezul'tatam issledovanii s kontroliruemymi istochnikami polya (Baltiiskii shchit, Russkaya platforma) (Model of electrical conductivity of the lithosphere based on the results of studies with the absorption of field sources (Baltic Shield, Russian Platform)), Leningrad, Nauka, 1990, 159 p. [in Russian].

Zhamaletdinov, A.A., Model of the electrical conductivity of the continental lithosphere, Uchenye zapiski SPbGU – Voprosy geofiziki (Scientific Notes of St. Petersburg State University – Issues of Geophysics), 2005, iss. 38, no. 438, pp. 115–129. [in Russian].

Zhamaletdinov, A.A., Teoriya i metodika glubinnykh elektromagnitnykh zondirovanii s moshchnymi kontroliruemymi istochnikami (Opyt kriticheskogo analiza) (Theory and methodology of deep electromagnetic soundings with powerful controlled sources (critical analysis experience)), St. Petersburg, St. Petersburg State University, 2012, 163 p. [in Russian].

Zhamaletdinov, A.A., Velikhov, E.P., Shevtsov, A.N., Kolobov, V.V., Kolesnikov, V.E., Skorokhodov, A.A., Korotkova, T.G., Ivonin, V.V., Ryazantsev, P.A., Birulya, M.A., The Kovdor-2015 experiment: Study of the parameters of a conductive layer of dilatancy-diffusion nature (DD layer) in the Archaean Crystalline Basement of the Baltic Shield, Doklady Earth Sciences, 2017, vol. 474, no. 2, pp. 641–645.