Abstract:

Synthetic fluid inclusions in the systems of pure H2O, of pure CO2, of H2ONaCl and of H2OCO2 were made using the technique of optical fused silica capillary. Those capillary samples were analyzed by microthermometry and microspectroscopy. The experiment shows that the fluids in silica capillary are the representative of loading fluids, and the microthermometry and microspectroscopy, the two common approaches for measuring the fluid inclusion, are suitable to be applied to the analysis of capillary samples. The microthermometric and microspectroscopic results reveal that the technique of silica capillary gives us a better means to understand the phase equilibria during the progress of microthermometry and to characterize the spectra of inclusion fluids and to develop the methods of analyzing the fluid inclusion. This study demonstrates that the technique of optical fused silica capillary provides a new means for the study of fluid inclusion, which may be widely applied to the fluid inclusion study.

Key words:  optical fused silica capillary, synthetic fluid inclusion, microthermometry, microspectroscopy