The Hautavaara sanukitoid massif, located in the southern Vedlozero-Segozero greenstone belt, Karelia, is differentiated from monzogabbro to moderately alkaline granite. Its structure and the petrographic and petrochemical characteristics of all its rock types are discussed. The granosyenites are subjected to mean temperature variations and display Au-Mo-geochemical specialization. Gold-sulphide-quartz vein mineralization and molybdenite mineralization are confined to them.