MESOZOIC ALKALI LAMPROPHYRES IN VARISCAN GRANITOIDS OF THE MALE KARPATY AND NIZKE TATRY MOUNTAINS — GEOCHRONOLOGY AND GEOCHEMISTRY
Published: Oct 2002
Pages: 295 - 301
Authors: JAN SPISIAK, KADOSA BALOGH
Abstract: Mesozoic alkali lamprophyres from the Male Karpaty Mts and Nizke Tatry Mts granitoids have a similar petrographic pattern. The textures are phyric, with amphibole and clinopyroxene (Cpx) (and/or olivine) phenocrysts. Cpx are zonal and correspond to diopside. Amphibole are zoning too and correspond to kaersutites. On the basis of chemical composition they can be ranked with alkaline lamprophyres. The K/Ar age (approx. 100 Ma) of these dykes corresponds to the age of the Cretaceous alkaline basalt/basanite in the Krizna Nappe of the Central Western Carpathians.
Keywords: Central Western Carpathians, Mesozoic, geochronology, geochemistry, alkali lamprophyres
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Volume 53 no. 5 / October 2002
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