Tracing the Initiation of the Tribeč Mountain Exhumation by Laser-Probe <sup>40</sup>Ar/<sup>39</sup>Ar Dating of Seismogenic Pseudotachylytes (Western Carpathians, Slovakia)
- Kohút, Milan
- Sherlock, Sarah C.
DOIAbstract
The seismogenic pseudotachylytes from the Tribeč Mountains (Western Carpathians, Slovakia) were dated by means of the laser microprobe 40Ar/39Ar method. The Tribeč Mountain crystalline basement was buried to 5–7.5-km depths, where it experienced approximately >110°C and <210°C thermal conditions. The dated pseudotachylytes have spot ages between 58 ± 1 and 46 ± 1 Ma with a weighted mean age of 49.7 ± 1.3 Ma, indicating that seismic activity caused their origin, the propagation of subvertical basement marginal faults, and/or the inception of basement unroofing processes in the southern part of the Central Carpathian Paleogene Basin. The extensional tectonics were responsible for the exhumation of basement highs and the opening of the intramo...
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