Mineralogy and geochronology of calc-alkaline lamprophyres from the Nizke Tatry Mts. crystalline complex (Western Carpathians)

摘要

The examined Late Paleozoic calc-alkaline dyke rocks occur within the Nizke Tatry Mts. crystalline complex (Kumstova valley and Jamba village). Their mineral composition is quite simple - the main mafic minerals are clinopyroxene, amphibole and biotite, and the felsic minerals are alkaline feldspar, plagioclase and quartz. They show a rather high degree of alteration. According to their mineralogical composition, the studied rocks correspond to calc-alkaline lamprophyres having revealed and age of 259. 0 ± 2.8 Ma.