Seismic activity and deep conductivity structure of the Eastern Carpathians

Kováčiková, Svetlana; Logvinov, I.M.; Nazarevych, А. V.; Nazarevych, L.Ye.; Pek, Josef; Tarasov, V. N.; Kalenda, Pavel

doi:10.1007/s11200-014-0942-y

Cited by 12 publications

(21 citation statements)

References 23 publications

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“…Nevertheless, correlation of low resistivity areas in both models can be seen. As was mentioned in Kováčiková et al (2016), the CrCA in the West Carpathians seems to be located between the Magura nappe and the PKB (Figure 4b). In the Ukrainian Carpathians, where the Magura nappe narrows and disappears from the surface, the anomalous zone becomes wider and reaches the Carpathians front (Figure 4b and c, Figure 5).…”

Section: Discussionsupporting

confidence: 60%

“…The magnetic field on the Earth's surface can be calculated recursively from boundary conditions at layer boundaries. Details of the modeling technique were presented in Kováčiková et al (2005Kováčiková et al ( , 2016.…”

Section: Quasi-3-d Inversion Resultsmentioning

confidence: 99%

“…In Figure 3, the absence of continuous and uninterrupted conductors within the lower part of the sedimentary layer and the thickness of which can reach 10 km and more according to the seismic information (for example, Kováčiková et al, 2016;Starostenko et al, 2013), and within the crystalline basement and the upper mantle in the studied area can follow from large distances between A possible origin may be industrial noise due to a number of pipelines and electrified railways within this area. Of course, any interpretation of 3-D data with 2-D techniques can result in misleading conclusions even if the area is covered densely by MT profiles (Ledo, 2005); nevertheless, comparison with the quasi-3-D thin sheet inverse models can support our assumptions.…”

Section: 1029/2018tc005311mentioning

confidence: 96%

“…Danilovich (1978) mentions phyllites and black graphite-rich quartzites in the Lower and Upper Paleozoic crystalline rocks. Small deposits of graphite bearing rocks (less than 1.5 km 2 in area and thickness not exceeding 100 m) are (Figure 1, Figure 5; Kováčiková et al, 2016); the heat flux density Q: (1) experimental, (2) calculated from temperature gradients, (3) isotherms of calculated temperatures°C, (4) contours of low resistivity zones for 100 ohmm and (b) comparison of the geoelectric model at the depth of 16 km resulting from the 2D modeling and the hydrothermal data according to Shlapinskyi (2015): (1) contour of the hydrothermal field and (2) carbonated mineral water springs.…”

Section: Correlation Of the Anomalous Conductivity With Graphitizationmentioning

confidence: 99%

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Comparison of the 2‐D and Quasi‐3‐D Geoelectric Models of the Ukrainian Eastern Carpathians and Their Link to the Tectonic Structure

Kováčiková

Logvinov²,

Tarasov³

2019

Tectonics

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We present results of a study of the electrical conductivity distribution beneath the Ukrainian Eastern Carpathians where the Carpathian arc turns to the southeast and reaches the maximum curvature further in the Romanian territory. We have used the magnetotelluric and magnetovariational data in the period range of 1–6,000 s collected by geoelectric groups from several countries during deep induction experiments, which covered the studied area by a number of field stations clustered along profiles crossing the Carpathian arc. In this work, we compare the 2‐D and quasi‐3‐D thin sheet inverse models, which allow us to constrain both the geometry and electrical properties of the anomalous conductivity structures beneath the Carpathians. Comparison of the inverse results with the Carpathians tectonics indicates that the Carpathian conductivity anomaly within the Polish and Slovak territory is located approximately between the Magura nappe front and the Pieniny Klippen Belt. In Ukraine, where the Magura nappe narrows and disappears, the anomaly reaches the front of the Outer Carpathians. The resulting quasi‐3‐D model of the conductivity structure beneath the Carpathians is compared with other geophysical and geological data within the region. The relation of the position of the conductors to the heat flow models and to location of the earthquakes sources indicates possible geological mechanisms, such as saline pore fluids, thin films of grain boundary graphite, or partial melting, connected with recent activation zones.

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Section: Discussionsupporting

confidence: 60%

Section: Quasi-3-d Inversion Resultsmentioning

confidence: 99%

Section: 1029/2018tc005311mentioning

confidence: 96%

Section: Correlation Of the Anomalous Conductivity With Graphitizationmentioning

confidence: 99%

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Comparison of the 2‐D and Quasi‐3‐D Geoelectric Models of the Ukrainian Eastern Carpathians and Their Link to the Tectonic Structure

Kováčiková

Logvinov²,

Tarasov³

2019

Tectonics

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“…Its source is presumably located in the depth interval of about 10-20 km although to the east, it approaches the surface reaching about 8 or less km in Ukraine (Logvinov 2015). Choice of the modelling parameters and results was presented in Kováčiková et al (2016). The model consisted of 46 × 46 cells; the cell size was 10 km × 10 km with respect to the used period range (400 s -6400 s).…”

Section: Geoelectric Investigationsmentioning

confidence: 99%

The relation of the seismicity in the eastern part of the Ukrainian Carpathians and the distribution of electrical conductivity in the Earth’s crust

Kováčiková

Logvinov

Tarasov

2019

Geologica Carpathica

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We present results of a study of the peculiarities of the seismicity and electrical conductivity distribution beneath the Ukrainian Eastern Carpathians. Based on the analysis of seismic data for the years 1999–2016, specific zones of concentration of earthquake sources related to the principal fault systems and their intersections have been distinguished. This paper covers two zones, one linked to the contact of the Outer Carpathians and the Carpathian Foredeep and another one linked to the fault system transverse to the Carpathians strike. Both belts of earthquake sources concentration correlate well with the geoelectric models of the studied area obtained as a result of 2D and quasi-3D inversion. Most of the seismic events occur at the intersection of the mentioned seismic zones, at shallower depths, than the main conductive structures appear, concentrated at their marginal parts. The interrelation of both phenomena suggests their common explanation by processes occurring in active fault systems: fracturing, shear deformation, migration of highly mineralized fluids, high porous pressure, accumulation and release of tectonic stress.

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Electric resistivity distribution in the Earth’s crust and upper mantle for the southern East European Platform and Crimea from area-wide 2D models

Logvinov

Tarasov

2018

Acta Geophys.

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Seismic activity and deep conductivity structure of the Eastern Carpathians

Cited by 12 publications

References 23 publications

Comparison of the 2‐D and Quasi‐3‐D Geoelectric Models of the Ukrainian Eastern Carpathians and Their Link to the Tectonic Structure

Comparison of the 2‐D and Quasi‐3‐D Geoelectric Models of the Ukrainian Eastern Carpathians and Their Link to the Tectonic Structure

The relation of the seismicity in the eastern part of the Ukrainian Carpathians and the distribution of electrical conductivity in the Earth’s crust

Electric resistivity distribution in the Earth’s crust and upper mantle for the southern East European Platform and Crimea from area-wide 2D models

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