Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)
Pegmatite of beryl-columbite type from Šejby, Novohradské hory highland, Czech Republic
Abstract
New pegmatite of beryl-columbite type has been found near Šejby, Novohradské hory highland, Moldanubian zone of the Bohemian Massif, southern Czech Republic. The N-S trending pegmatite dyke (50x3 m in size) cut gneisses near the exocontact of the two-mica granites of the South Bohemian Pluton and is accompanied with several granite dykes of similar strike and mineral and chemical composition. The pegmatite comprises of quartz, blocky K-feldspar, muscovite and beryl with disseminated fluorapatite, ferrocolumbite-ferotantalite and ferrotapiolite. Zircon with uraninite inclusions is scarce. A body of muscovite-quartz metasomatite with disseminated ferrocolumbite has been found nearby.
