Application of cathodoluminescence to the study of metamorphic textures in marbles from the eastern part of the Bohemian Massif


Authors: Houzar S, Leichmann J

Published in: Bulletin of Geosciences, volume 78, issue 3; pages: 241 - 250; Received 3 April 2002; Accepted in revised form 4 February 2003;

Keywords: cathodoluminescence microscopy, marbles, metamorphic textures, Moravicum, Moldanubicum,

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Application of cathodoluminescence to the marble study opens new possibilities in the investigation of metamorphic reaction textures and mineral assemblages in marbles in comparison to the observation using transmitted light. The CL study of marbles in the Moravicum and Moldanubicum units indicated that, with an increasing grade of metamorphism, the CL properties of calcite, dolomite and some other minerals change depending on the mineral reactions and chemical composition. Photographs illustrate examples of different textures and CL of minerals from the studied units, representing marbles of different metamorphic grades from the greenschist facies (biotite zone of the Lukov Unit of the Moravicum) to the granulite facies (Moldanubicum). Structures resulting from the reactions do not always perfectly correspond with the theoretical presumptions and can be explained by a migration of components (e.g., Mg and Si) for a short distance.