National Technical University of Athens, School of Mining & Metallurgical Engineering, Division of Geosciences Heroon Politechniou 9, GR-15773 Zografou, Athens, Greece
Raman Spectroscopy was employed to confirm the presence of hydrogrossular, rather than vesuvianite, in rodingites of the Othrys ophiolite suite, central Greece. The Raman spectra obtained from the fine-grained, weakly birefringent minerals, with anomalous bluishgrey interference colours documented the presence of hydrogrossular by its characteristic bands at ~ 360-362, 534-537, 817-819, 870-872 and 3600 cm-1. No Raman spectra indicative of vesuvianite were obtained precluding the existence of this phase. The absence of vesuvianite implies that the metasomatising fluid phase was rather rich in CO2, an observation which is also verified by the abundance of calcite and assists in further studying the evolution of these rocks.