In connection with the development of hydrochemical method of searching for gold and other minerals now increased attention to the study of microcomponents in ground and surface waters of Aldan district.The general plateau-like character of the relief of Aldan district in some areas is broken by the presence of solitary ridges and ridges, where the rivers of the district originate. The hydrographic network belongs to the basin of the Aldan River and its major tributaries - Timpton, Yakokit, Selig-dar. The climate of the district is sharply continental with annual precipitation of about 440 mm and an average annual negative air temperature of - 6°C.