Evolution of high-Al gneisses from the Mongolian Altay Mountains

Abstract

High-Al-Mg metamorphic rocks from the Mongolian Altay Mountains have been analyzed in detail. We present the metamorphic evolution and protolith formation of the gneisses, which gave new constraints on the tectonic evolution using geological and petrographical observations, geochemical and geochronological data combined with metamorphic petrological techniques.