Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)
High-alumina intercalations in quartzites of the Sedlčany-Krásná Hora metamorphic "Islet" (Central Bohemia)
Geoscience Research Reports 42, 2009 (GRR for 2008),
pages 152–153
Abstract
Ordovician quartzites occurring in the surroundings of the town Sedlčany in Central Bohemia contain schistose intercalations with extremely abundant sillimanite. The Al2O3-content attaints here as much as 33 % and high-Al clayey or even laterite protolith can be assumed for them. The blastic origin of sillimanite evidently originated by thermal effects of the underlaying Variscan granitoids of the Central Bohemian Plutonic Complex. The economic significance of the occurrence is rather problematic.
