High-pressure Experiments in Petrological Researches by Piston-cylinder Device Method

The article describes the method used in experimental petrological studies of rock-forming mineral solid solutions. It describes in detail the concept of initial preparation of the materials. The article presents the description of the piston-cylinder type apparatus used in our experimental studies. Such equipment is suitable for the synthesis of high-pressure phases of the silicate systems with the pressure values up to 4.0 GPa and the temperature up to 1700 °C. The article also presents the details and describes special features of our method of conducting experiments with the piston-cylinder apparatus. To synthesis the phases the obtained homogeneous glasses are used which determine the equability of the substance distribution. It is revealed that the high-pressure cells made of sodium chloride are more suitable then the water-containing and silicate-containing ones usually used in similar experiments. The analytical methods applied to the obtained data analysis are also outlined.