Records of Crustal Metasomatism in the Garnet Peridotites of the Ulten Zone (Upper Austroalpine, Eastern Alps)

peridotites. We infer that the metasomatizing hydrous fluids could Peridotites in the Ulten Zone (Upper Austroalpine, Eastern Alps), represent the residual fluids left after the crystallization of leucosomes, occur as small bodies within lower-crustal rocks (gneisses and starting from water-undersaturated melts produced during migmigmatites) subducted at eclogite-facies conditions during the Vamatization of the host gneisses. riscan orogeny. They record a complex metamorphic and deformation evolution as indicated by the transition from coarse-grained spinelbearing peridotites to fine-grained garnet + amphibole-bearing peridotites, and are interpreted as portions of mantle wedge that