Coastal-marine and legacy placers of the southern Primorye (Russia): ecology and commercial exploitation

Abstract

The article is devoted to the development of technology for reenrichment of waste from the exploitation of old gold-bearing placers that pose a significant threat to the environment. Technogenic and coastalmarine placers of the south of Primorye (Far East, Russia) were chosen as the object of research. At the same time, methods of powder metallurgy, as well as leaching of precious metals and metallic mercury with thiocarbamide-thiocinate solutions with their simultaneous demercurization were used. The application of this scheme for the extraction of useful and toxic components from placer material will allow to involve in industrial circulation numerous man-made and beach placers of the south of the Russian Far East in compliance with resource-saving principles and environmental aspects.