Abstract
Fluid inclusions have been observed in quartz phenocrystals of the most acid facies (rhyolite and dacite) of the subvolcanicarea (Rodna-Bârgu Mountains) in the East Carpathians. All identified fluid inclusions are aqueous (H 2O NaC1 system). They occur either as primary or pseudosecondary and secondary fluid inclusions. Homogenisation, both to liquid and vapor, occurs between 120 and 540 °C. The general evolution of aqueous fluids is to decreasing salinity with decreasing temperature. Relatively low salinities (from 6 to 1.4 wt.% NaCl eq.) could indicate the presence of meteoric water. The occurrence of exploded fluid inclusions indicates strong decompression regime during magma uplift.
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