Garnet-Vesuvianite Equilibrium in Rodingites from Dobšiná (Western Carpathians)

Intensively metasomatized rocks from serpentinized ultramafic tectonic fragments in Dobšiná, Western Carpathians, consist of typical rodingite mineral association: hydrated garnet, vesuvianite, diopside and clinochlore. Electron microprobe analysis (EMPA) Micro-Raman analyses the main minerals evidence complex mineralogical evolution variable chemistry. Garnet solid solution is dominated by grossular-andradite series, which demonstrates a significant degree hydration, mainly for grossular rich garnet cores. locally enriched TiO2 (up to 13 wt%), possibly indicating chemical relic Ti-oxide mineral. Younger, andradite-richer rims demonstrate low suggesting harder incorporation an (OH)? anion into its crystal structure. variations display ideal negative correlation between Al (Fe3+ + Ti). The most recent phase represented euhedral vesuvianite (± chlorite), crystallizes at expense solution. This reaction shows well-equilibrated character indicates high extent rodingitization process. Chlorite thermometry models suggest average temperature late (trans) formation about 265 °C.