R8: Metamorphic rocks and tectonics

[R8P-02] Chemical compositions of garnet from felsic granulite occurring in the Bohemian Massif, Czech Republic

[Presentation award entry]

*Mio Naito¹, Kensuke Yamane¹, Daisuke Nakamura¹, Takao Hirajima², Martin Svojtka³ (1. Okayama Univ. , 2. Kyoto Univ., 3. Academy of Science of the Czech Republic)

Keywords:Bohemian Massif, granulite, garnet, pressure-temperature path

This study compares the chemical compositions of garnets in felsic granulite from the Plešovice (PV) in the southeastern part of the Blanský les body, Czech Republic, and from Zrcadlová Hut' (ZH) in the central part of the body. Garnet in the felsic granulite from PV shows retrograde zoning, whereas garnet from ZH shows prograde zoning with increasing Mg from the core to the rim. Geothermobarometer showed no clear difference in the P-T conditions between PV and ZH. The presence of garnet with prograde zoning in ZH may be due to rapid cooling in ZH.