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Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)

Volcaniclastic deposits of Upper Radnice Member between Lubná and Nové Strašecí

Marcela Stárková, Marie Adamová

Geoscience Research Reports 41, 2008 (GRR for 2007), pages 53–59

Keywords: geochemistry, sediments, petrography, Carboniferous refractory raw materials, pyroclastics, volcaniclastics, crystal rich tuff, rhyolitic magma

Map sheets: Rakovník (12-14)

Full text (PDF, 0.91 MB)

Abstract

Refractory raw materials near Rakovník, at the southern margin of the Carboniferous Kladno-Rakovník Basin were studied in the opencast mines from the point of view of geochemistry and petrography. The origin of refractory raw materials are rhyolitic eruptions and sedimentary processes. Tuffs are fine grained pyroclastic and resedimented volcaniclastics with negative Eu anomalies and high contents of Th, U, Nb, Li, Be, Bi, Sn, Pb, Y and REE. Hg, Sb and Y content of refractory rocks in Pecínov is similar to Cambrian rhyolitic magma with Variscan mineralization.