Tourmaline evolution in the Nedvědice orthogneiss, Svratka Unit, Bohemian Massif

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Authors	KLIŠTINEC Ján CEMPÍREK Jan
Year of publication	2018
Type	Conference abstract
MU Faculty or unit	Faculty of Science
Citation
Description	The Nedvědice orthogneiss is characterized by high contents of F, and B2O3, manifested by the presence of F-rich muscovite, F-rich tourmaline, and rare fluorite-tourmaline layers. Tourmaline forms subhedral grains in the orthogneiss, prismatic crystals in muscovite and fluorite-tourmaline layers in the orthogneiss. Tourmaline is also present as fine-grained layers in the muscovite layers. In our study, two types of tourmaline zoning were distinguished in the four types of studied rocks. Our results show a significant change of tourmaline composition during metamorphic recrystallization.
Related projects:	Geologické, geodynamické a environmentální procesy východního okraje Českého masívu a jejich vývoj.