A problem of evolution of high-grade polymeta- morphic terrain appeared in last decades:in worldwide complexes the identification of true stages of polymetamorphism encounters a problem of zircon zoning(or garnet etc.)that is the function of fluid activity and therefore the newly formed zone can not always be recorded.Structural geology allows discriminating between different stages of metamor- A problem of evolution of high-grade polymeta- morphic terrain that last the following decades: in worldwide complexes the identification of true stages of polymetamorphism encounters a problem of zircon zoning (or garnet etc.) that is the function of fluid activity and therefore new formed zone can not always be recorded. Structural geology allows discriminating between different stages of metamor-