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Hydrogen isotope investigations on hydrothermal quartz reveal two H-reservoirs: (i) trapped fluid inclusions, and (ii) structurally bound water in homogenously distributed small clusters or bubbles. Varying mixing ratios of the two reservoirs are sampled by means of mechanical and thermal decrepitation applied to different grain size fractions. A two-component mixing calculation results in an isotopic...
Microthermometry and stable isotope data enable us to distinguish between two contrasting sets of fluids involved in the Hercynian and Alpine metamorphic events in the Western Carpathians. High-temperature smoky quartz (450-500°C) was probably formed during the syn-kinematic phase of the Hercynian metamorphism, when chemical and isotopic equilibrium had been established between aqueous solutions...
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