Calculation of temperature distribution and rheological properties of the lithosphere along transect I in the Western Carpathians

Abstract

Using the 2D integrated modelling method, we calculated the temperature model of the lithosphere along transect I passing through the Western Carpathians. Based on the extrapolation of failure criteria, lithology and calculated temperature distribution, we derived the rheology model of the lithosphere in the area. Our results indicate clearly that the strength decreases from the Bohemian Massif via the Western Carpathians to the Pannonian Basin. The largest strength can be observed within the upper crust on the boundary between the upper and lower crust. This phenomenon is typical for all studied tectonic units: the Bohemian Massif, the Western Carpathians and the Pannonian Basin. These results suggest mostly rigid deformation in the upper crust of the units. By contrast, the lower crust in the Bohemian Massif and the Western Carpathians reflects significantly lower strength, while in the Pannonian Basin the strength is the smallest. In all tectonic units the strength within the uppermost mantle (lower lithosphere) disappears. It can be suggested that the ductile deformation dominates in this part of the lithosphere.

Calculation of temperature distribution and rheological properties of the lithosphere along transect II in the Western Carpathian-Pannonian Basin region

“…HP: heat production (μWm −3 ), TC: thermal conductivity (Wm −1 K −1 ), ρ: density at room temperature (kgm −3 ), Ap: power law pre exponential constant, n: power law exponent, Ep: power law activation energy (kJ mol −1 ) ductile deformation in this part of the lithosphere. Our results are in a good correlation with previously published results of rheological modeling for the transect I located in the Carpathian-Pannonian Basin region (Dérerová et al, 2012).…”

“…In 2012, for the first time, 2D integrated modelling algorithm has been applied to calculate temperature distribution and derive the rheological model along transect I passing through the Carpathian-Pannonian basin region (Dérerová et al, 2012). We continue in our effort to create a comprehensive and complete rheological model of the Carpathian-Pannonian lithosphere and apply our integrated modelling approach for calculating rheological model along transect II.…”

Thermal state of the lithosphere in the Danube Basin and its relation to tectonics

“…The first map came from heat flow density determinations from the studied region or wider area stored in databases and/or interpreted in the form of the isoline maps (Global heat flow database, 2011;Čermák et al, 1992;Hurtig et al, 1992;Franko et al, 1995;Lenkey et al, 2002 and others). In addition we used the knowledge from geothermic and integrated modelling along profiles coming through the Danube Basin (Bielik et al, 1991;Majcin, 1993;Zeyen et al, 2002;Dérerová et al, 2012) and the temperature distribution maps in various depths from the surface (Franko et al, 1995;"Altener II", 2005;"Transenergy", 2013). Last but not least we applied the results of geothermic modelling related to refraction effects on structures with great thermal conductivity contrast (Majcin, 1992;Majcin and Polák, 1995;Hvoždara, 2008;Majcin et al, 2012, and others).…”

“…The models calculated in steady state regime were made by Bielik et al (1991), Majcin (1993) and others. The results of the geophysical integrated modelling approaches were presented in Zeyen et al (2002), Dérerová et al (2012Dérerová et al ( , 2014 and Grinč et al (2014). Both classic geothermic and integrated modelling approaches contributed to the determination of the main structural boundaries, namely the lithosphereasthenosphere (LIAS) transition zone, MOHO and others in the region under study (Bielik et al, 1991;Majcin, 1993;Zeyen et al, 2002;Bielik et al, 2004;Bielik et al, 2010;Grinč et al, 2014).…”

Deep geothermal sources for electricity production in Slovakia: thermal conditions

“…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).…”