Kráľ J., Hók J., Bachliński R. & Ivanička J., 2013: Rb/Sr and ⁴⁰Ar/³⁹Ar data from crystalline basement rocks of the Považský Inovec Mts. (Western Carpathians). Acta Geologica Slovaca, 5, 2, 195–210. (in Slovak with English summary)

Rb/Sr a ⁴⁰Ar/³⁹Ar údaje z kryštalinika Považského Inovca (Západné Karpaty)

Rb/Sr and ⁴⁰Ar/³⁹Ar data from crystalline basement rocks of the Považský Inovec Mts. (Western Carpathians)

Ján Kráľ¹, Jozef Hók², Robert Bachliński³ & Ján Ivanička¹

¹Štátny geologický ústav Dionýza Štúra, Mlynská dolina 1, 817 04 Bratislava, Slovakia; jan.kral.ba@gmail.com
2Katedra geológie a paleontológie, Prírodovedecká fakulta, Univerzita Komenského v Bratislave, Mlynská dolina G, 842 15 Bratislava, Slovakia; hok@fns.uniba.sk
³Instytut Nauk Geologicznych, Polska Akademia Nauk, ul. Twarda 51/55, 00-818 Warszawa, Poland

Abstract

Minerals separated from diaphtoritic rocks of the Selec block of the Považský Inovec crystalline complex were dated by ⁴⁰Ar/³⁹Ar method (coarse-grained muscovites), and accessory apatites, coarse-grained muscovites and whole rocks were analyzed by Rb-Sr method. Obtained ⁴⁰Ar/³⁹Ar muscovite plateau ages and calculated Rb-Sr ages for two point accessory apatite – coarse-grained muscovite pairs are identical (307–310 Ma) and are considered as age of diaphtoresis in the Považský Inovec Mts. crystalline complex. Both isotopic systems in minerals registered no metamorphic Alpine overprint. But in whole rocks, increasing of Rb/Sr ratio is documented that can be explained by loss of ordinary strontium from acid plagioclases during low temperature alteration under significant Alpine tectonics influence.

Key words: Western Carpathians, Považský Inovec, crystalline basement diaphtoresis, ⁴⁰Ar/³⁹Ar, Rb-Sr mineral dating

Manuscript received: 2013-08-14

Revised version accepted: 2013-11-19