Studying the Stability of the K/Ar Isotopic System of Phlogopites in Conditions of High T, P: 40Ar/39Ar Dating, Laboratory Experiment, Numerical Simulation

Typically, 40Ar/39Ar dating of phlogopites from deep-seated xenoliths kimberlite pipes produces estimates that suggest much older ages than those when these were intruded. High-pressure (3 GPa) laboratory experiments enabled the authors to explore behaviour argon in phlogopite structure under conditions correspond mantle, at temperatures (from 700 1000 °С), far exceeding closure temperature K/Ar isotopic system. “Volume diffusion” remains foremost for describing mobility high pressures. The mantle material age can be estimated through kimberlites, employing method, subject correction a partial loss radiogenic 40Ar xenolith moves upwards Earth’s surface. obtained data served as basis proposing model system minerals great depths (lower crust, mantle), and transporting melt.