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Fluid inclusions in olivine were extracted in vacuum by a sodium carbonate fusion method. In the present study, bulk hydrogen content and D/H ratio of the inclusion were measured. The results showed that a consistent value of δD was obtained with a standard deviation of ±2‰, when the absolute amount of hydrogen extracted was more than 40μmol (0.9ml STP H2). On the other hand, when the absolute amount of extracted hydrogen was less than 40μmol, δD value of the extract fluctuated, probably being affected by the contamination in the whole procedure.

Hydrogen extractions from silicate minerals by sodium carbonate fusion and its application to deuterium analyses of fluid inclusions in some olivines.