Fig. 1

a Tectonic sketch map of the Western Carpathians with exposures of Variscan crystalline complexes belonging to three principal units and occurrences of Paleogene sediments and Neogene volcanic rocks. Inset map shows the location a; WC Western Carpathians, EA Eastern Alps. b Digital elevation model of the Nízke Tatry Mts. (NT) with position of the samples and trace of the profile presented in the Fig. 2. c Geological sketch map of the NT and surrounding areas (modified after Biely et al. 1992; Lexa et al. 2000) with location of the samples and AFT ages reported by Král’ (1977). d Schematic profile after Biely et al. (1992) (for location, see dashed line in b)