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Modern geoelectric surveys along the Mali Heivtsi ‒ Tiachiv profile of the Transcarpathian Trough
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- Category: Content №2 2025
- Last Updated on 26 April 2025
- Published on 30 November -0001
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Authors:
A.M.Kushnir*, orcid.org/0000-0003-1026-9268, Subbotin Institute of Geophysics, National Academy of Sciences of Ukraine, Kyiv, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
A.Y.Stolpakov, orcid.org/0009-0002-0074-9313, Subbotin Institute of Geophysics, National Academy of Sciences of Ukraine, Kyiv, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2025, (2): 033 - 041
https://doi.org/10.33271/nvngu/2025-2/033
Abstract:
Purpose. To study the structure of the Transcarpathian trough by means of deep geoelectricity methods, to process, analyze and interpret modern research, to assess the geoelectric structure of the region at the qualitative level.
Methodology. To study the deep structure of the Transcarpathian Trough in 2023, modern synchronous magnetotelluric and magnetovariation studies were conducted along the Mali Heyivtsi ‒ Tiachiv profile at nine measurement points. The experimental materials were processed using the PRC_MTMV software, which allows for joint noise-protection estimation of the response functions. The estimates of the types for the periods of geomagnetic variations from 19 to 6,000 s and the parameters of the apparent resistivity and impedance phase from 10 to 10,000 s were obtained.
Findings. The distribution of the induction parameters over the periods of geomagnetic variations of 1,800 s indicates the influence of the submeridional regional magnetovariation Carpathian anomaly and deep electrical conductivity anomalies. The joint analysis of the magnetotelluric sounding curves and their formal interpretation using Niblett transformation indicate the presence of a surface conductor that extends from north-west to south-east and is associated with the surface conductivity of the sedimentary strata of the Chop-Mukachevo and Solotvyno depressions in the central part of the Transcarpathian trough. Deeper in the crust, there is a vertical interspersion of conductors with high and low resistivity values within the boundaries of the Vyhorlat-Hutynsky Ridge and Solotvynska Depression. This behavior may be explained by the influence of activated faults and their intersections on the observed data. This is supported by the high seismic activity and the depth of the earthquake hypocenters. The experimental data along the Mali Heivtsi-Tiachiv profile revealed a layered asthenosphere complicated by different resistances inside, the upper edge of which lies at depths of 40–70 km within the Chop-Mukachevo depression, 60 km within the Vyhorlat-Hutynsky ridge, and finally extinct at the beginning of the Solotvynska depression.
Originality. Based on the results of a comprehensive interpretation of the latest experimental data, the fundamental regional and local features of the deep structure of the Transcarpathian trough were found.
Practical value. The data on the geoelectric structure and resistivity distribution parameters of the Transcarpathian trough complement the understanding of the electrical conductivity of the Ukrainian Carpathians and bring us closer to the possibility of creating a three-dimensional deep geoelectric model of the region.
Keywords: Transcarpathian Trough, magnetovariation profiling, magnetotelluric sounding, electrical conductivity anomalies
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