Garnet and some other minerals in the shallow-water deposits of the Kutná Hora-Karlov locality (Bohemian Cretaceous Basin, Czech Republic)

 

Authors: Žítt J, Šťastný M, Šrein V, Hradecká L

Published in: Bulletin of Geosciences, volume 74, issue 3; pages: 279 - 288;

Keywords: heavy minerals, source area, lithology, macropalaeontology, foraminifera, upper Cenomanian-lower Turonian, Bohemian Cretaceous Basin,

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Abstract

In the gneiss quarry of Kutná Hora-Karlov the Late Cretaceous deposits (late Cenomanian-early Turonian) are preserved in several bedrock depressions. In the macropalaeontologic washings (fraction > 0.63 mm) of the basal clastic fill (Korycany Member) of one depression, enormously rich occurrence of pyrope, almandine, rutile and tourmaline has been found. Based on chemical composition and other features of mineral grains, the environs of Malešov, Poličany, Kutná Hora (serpentinites, eclogites, amphibolites, mica-schists) and Perštejnec (serpentinites) are tentatively considered as their source areas. In addition to heavy minerals, a lithology of sediments, their foraminifera, and macrofauna are also discussed.