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Composition of fluids in quartz: discrimination of magma pulses in a Caledonian granitoid
1992
Mineralogical magazine
Preserved Fulltext
Fluids trapped inside fluid inclusions in quartz from the multiphase Starav monzogranite in Etive, Argyll, were extracted under vacuum and quantitative data for H2O and CO2 were obtained manometrically. Na and K were determined on an aqueous leach from the decrepitated grains. A bivariate diagram of H2O/CO2 versus Na/K discriminates between magma pulses and mirrors the whole-rock trace-element chemistry. This work shows that compositional variations of fluids in quartz from a weakly mineralised
doi:10.1180/minmag.1992.056.384.05
fatcat:l7ll7py76zeqlbrwjil43tqpsq