Improved geophysical image of the Carpathian-Pannonian Basin region

Bielik, M.; Alasonati‐Tašárová, Z.; Zeyen, Hermann; Dérerová, Jana; Afonso, Juan Carlos; Csicsay, Kristián

doi:10.1556/ageod.45.2010.3.3

Cited by 14 publications

(11 citation statements)

References 29 publications

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“…A scenario, where all SKS splitting is produced in the lithosphere, would only be possible if the foliation in the lithospheric mantle was vertical and the LAB was at ~125‐km depth beneath the NGVF (case 2 with crustal contribution included). Although such LAB depths have been proposed as maximum values (Bielik et al, ), it may be shallower than this (Tašárová et al, ). Moreover, absence of an asthenospheric contribution to seismic anisotropy is not a plausible hypothesis.…”

Section: Discussionmentioning

confidence: 99%

Lateral and Vertical Heterogeneity in the Lithospheric Mantle at the Northern Margin of the Pannonian Basin Reconstructed From Peridotite Xenolith Microstructures

et al. 2019

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This study analyzes the microstructures and deformational characteristics of spinel peridotite xenoliths from the Nógrád-Gömör Volcanic Field (NGVF), located on the northern margin of a young extensional basin presently affected by compression. The xenoliths show a wide range of microstructures, bearing the imprints of heterogeneous deformation and variable degrees of subsequent annealing. Olivine crystal preferred orientations (CPOs) have dominantly [010]-fiber and orthorhombic patterns. Orthopyroxene CPOs indicate coeval deformation with olivine. Olivine J indices correlate positively with equilibration temperatures, suggesting that the CPO strength increases with depth. In contrast, the intensity of intragranular deformation in olivine varies as a function of the sampling locality. We interpret the microstructures and CPO patterns as recording deformation by dislocation creep in a transpressional regime, which is consistent with recent tectonic evolution in the Carpathian-Pannonian region due to the convergence between the Adria microplate and the European platform. Postkinematic annealing is probably linked to percolation of metasomatism by mafic melts through the upper mantle of the NGVF prior to the eruption of the host alkali basalt. Elevated equilibration temperatures in xenoliths from the central part of the volcanic field are interpreted to be associated with the last metasomatic event, which only shortly preceded the ascent of the host magma. Despite well-developed olivine CPOs in the xenoliths, which imply a strong seismic anisotropy, the lithospheric mantle alone cannot account for the shear wave splitting delay times measured in the NGVF, indicating that deformation in both the lithosphere and the asthenosphere contributes to the observed shear wave splitting.

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Section: Discussionmentioning

confidence: 99%

Lateral and Vertical Heterogeneity in the Lithospheric Mantle at the Northern Margin of the Pannonian Basin Reconstructed From Peridotite Xenolith Microstructures

et al. 2019

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“…The models calculated in a steady state regime were made by Bielik et al (1991), Majcin (1993) and others. The results of the geophysical integrated modelling approaches applied within the studied region were presented in Dérerová et al (2006), Bielik et al (2010), Hlavňová et al (2015). Moreover the transient 2D models along the profiles crossing the Carpathian arc and main local structures (Kutas et al, 1989;Majcin and Tsvyashchenko, 1994;Tarasov et al, 2005;Majcin et al, 2014 andKutas, 2014) deal with the recent tectono-thermal history of the region.…”

Section: Methods and Resultsmentioning

confidence: 99%

Thermal conditions for geothermal energy exploitation in the Transcarpathian depression and surrounding units

Majcin

Кутас

Bilčík

et al. 2016

Contributions to Geophysics and Geodesy

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Abstract:The contribution presents the results acquired both by direct cognitive geothermic methods and by modelling approaches of the lithosphere thermal state in the region of the Transcarpathian depression and surrounding units. The activities were aimed at the determination of the temperature field distribution and heat flow density distribution in the upper parts of the Earth's crust within the studied area. Primary new terrestrial heat flow density map was constructed from values determined for boreholes, from their interpretations and from newest outcomes of geothermal modelling methods based on steady-state and transient approaches, and also from other recently gained geophysical and geological knowledge. Thereafter we constructed the maps of temperature field distribution for selected depth levels of up to 5000 m below the surface. For the construction we have used measured borehole temperature data, the interpolation and extrapolation methods, and the modelling results of the refraction effects and of the influences of source type anomalies. New maps and other geothermic data served for the determination of depths with rock temperatures suitable for energy utilization namely production of electric energy minimally by the binary cycles. Consequently the thermal conditions were used to identify the most perspective areas for geothermal energy exploitation in the region under study.

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“…We constructed the starting geothermal models using these methods. Similarly to the paper (Majcin et al, 2016) these models were supplemented by existing results of the geothermal modelling made for the studied region both for steady state (Čermák and Bodri, 1986;Bielik et al, 1991;Majcin, 1993) and transient thermal regimes (Kutas et al, 1989;Majcin and Tsvyashchenko, 1994;Majcin et al, 1998;Tarasov et al, 2005;Majcin et al, 2014;Kutas, 2014;Majcin et al, 2015) approaches and by so-called integrated modelling approaches (Zeyen et al, 2002;Dérerová et al, 2006Dérerová et al, , 2012Dérerová et al, , 2014Bielik et al, 2010;Grinč et al, 2014;Hlavňová et al, 2015).…”

Section: Methodsmentioning

confidence: 99%

Deep geothermal sources for electricity production in Slovakia: thermal conditions

Majcin

Král²,

Bilčík

et al. 2017

Contributions to Geophysics and Geodesy

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Abstract:The contribution presents the results of geothermic interpretation approaches applied to measured geothermal data and is focused to determination of the thermal conditions both for application of classic hydrothermal sources exploitation and specialized EGS technologies for electricity production in the region of Slovakia and adjacent areas. Primarily, the heat flow density data and the temperature distribution measurements in boreholes were interpreted by classic 1D interpolation and extrapolation methods. New terrestrial heat flow density map for the studied area was constructed using the values determined in boreholes, their interpretations, the newest outcomes of geothermal modelling methods based both on steady-state and transient heat transfer approaches, and on other recently gained geoscientific knowledge. Thereafter, we constructed the maps of temperature field distribution for selected depth levels up to 6000 m below the surface and the final map of the isothermal surface depths for the reservoir temperature of 160• C. This final map serves for the appraisal of the effective application of the binary cycle power plant technology in Slovakia in terms of thermal conditions.

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Improved geophysical image of the Carpathian-Pannonian Basin region

Cited by 14 publications

References 29 publications

Lateral and Vertical Heterogeneity in the Lithospheric Mantle at the Northern Margin of the Pannonian Basin Reconstructed From Peridotite Xenolith Microstructures

Lateral and Vertical Heterogeneity in the Lithospheric Mantle at the Northern Margin of the Pannonian Basin Reconstructed From Peridotite Xenolith Microstructures

Thermal conditions for geothermal energy exploitation in the Transcarpathian depression and surrounding units

Deep geothermal sources for electricity production in Slovakia: thermal conditions

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