Progress in Metamorphic and Magmatic Petrology comprises a collection of review articles summarising recent scientific achievements in the theory of petrology. The contributors include many prominent specialists in the field, such as A. Boettcher, A. Marakushev, I. Kushiro, B. Mysen, W. Schreyer, W. Ernst, E. Grew, P. Wyllie and E-an Zen. Their papers discuss developments in experimental work as well as in field geology. The book is divided into three main sections: section 1 covers general thermodynamics and mineral equilibria, section 2 covers metamorphic and metasomatic processes, and the final section covers the mantle and magmatic processes. The subjects covered include the general thermodynamics of geological processes, the thermodynamics of solid solutions, geothermometry and geobarometry, P-T-time paths, experimental and theoretical modelling of metasomatic processes, the genesis of anorthosites, island arc magmatic rocks and kimberlites, and the thermal areas around intrusive bodies. The book is dedicated to the memory of Professor D. S. Korzhinskiy, a founder of the theory of open systems with perfectly mobile components.