Hók J., Littva J., Šujan M., Šamajová L., Šujan M. & Šipka F., 2018: Geological structure of the Dobrá Voda seismoactive area (western Slovakia). Acta Geologica Slovaca, 10, 2, 143–150.

Geological structure of the Dobrá Voda seismoactive area (western Slovakia)

Jozef Hók¹, Juraj Littva^1,2, Martin Šujan³, Lenka Šamajová¹, Michal Šujan¹ & František Šipka³

¹Department of Geology and Palaeontology, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovak Republic; jozef.hok@uniba.sk
²State Nature Conservancy of the Slovak Republic, Slovak Caves Administration, Hodžova 11, 031 01 Liptovský Mikuláš, Slovak Republic; juraj.littva@ssj.sk
³EQUIS Ltd., Račianska 57, 831 02 Bratislava, Slovak Republic

Abstract

The Dobrá Voda seismoactive area is the most significant seismic source zone in terms of seismic hazard of Slovakia. It is situated at the contact of the Bohemian Massif, Western Carpathians, and Eastern Alps. On the surface, the Dobrá Voda seismoactive area is built from the Triassic carbonate rocks overlain by Cainozoic sediments. The deeper basement consists of crystalline rocks. The whole structure is disrupted predominantly by normal faults oriented in NW‒SE and NE‒SW directions. Majority of the earthquakes hypocentres is concentrated in the crystalline basement. The Dobrá Voda seismoactive area represents crustal segment located above the zone of assumed persisting convergence between the Bohemian Massif and Internal Western Carpathians crystalline basement. The apical parts of this segment are in tensional to transtensional tectonic regime. The seismic activity in the Dobrá Voda seismoactive area was previously linked to the transpression segment of the Vienna Basin Transfer Fault, extending from the Alps through the Mur‒Mürz Valley, the Vienna Basin, and continuing into the External Western Carpathians. The Vienna Basin Transfer Fault could not be identified via new research in the Dobrá Voda seismoactive area.

Key words: Western Carpathians, neotectonics, Vienna Basin Transfer fault

Manuscript received: 2018-07-11

Revised version accepted: 2018-10-05