Zinc in natural waters in the Selenga River basin

Concentrations of Zn in the surface (river and lake) and subsurface waters are assessed in the basin of the Selenga River-the main tributary into Lake Baikal. Specific geographical features are revealed in Zn distributions in natural waters, which are determined by different Zn concentrations in drained rocks and soils and by the geochemical redox conditions of Zn migration. Areas with low, medium, and relatively high Zn concentrations (as compared with their Clarke concentrations) are determined.