An attempt is made to study pressure-heterogeneous high-alumina metapelites of andalusite-sillimanite and kyanite-sillimanite facies series for clearing up the P-T evolution of metamorphism related to thrusting tectonics. As a result of detailed research with the use of geothermobarometry and THERMOCALC-based analysis of mineral equilibria, P-T conditions were estimated and P-T paths of evolution were plotted for moderate and elevated pressures. The variability of P-T conditions of metamorphism suggests that the kyanite substitution for andalusite and other mineral transformations were caused by an increase in pressure under low geothermal gradient, as described by a model for tectonic thickening of the crust in the zone of the Panimba overthrust. The fact that there is no marked increase in temperature on thrusting is explained by the specific behavior of stationary geotherms for different kinds of rocks that have different thermophysical and heat-producing properties.

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