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A near-infrared (NIR) spectroscopic method is proposed to achieve the simultaneous determination of salinity and internal pressure of fluid inclusions in natural minerals. A combination band between the anti-symmetric stretching and bending vibrations of molecular water at approximately 5180 cm-1 was observed for standard salt solutions and natural minerals containing fluid inclusions with know...

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Supercritical fluids derived from magmas may have different cooling paths depending on the confining pressures. Shallowly emplaced magmas generate supercritical fluids, which, during cooling form hypersaline fluid and vapor. Supercritical fluid derived from deeper emplaced magmas does not undergo phase separation and the fluids cool below the solvus curve to form a single aqueous-dominated phas...