Hydrogeochemistry and hydrobiology of technogenic reservoirs of mining territories of Eastern Transbaikalia

The chemical composition of the waters quarry lakes formed as a result development Zavitinskoye lithium-beryllium deposit located in Eastern Transbaikalia (Russia) has been studied. studied ore pits are fresh with neutral and slightly alkaline reaction, mainly magnesium-calcium sulfate type. It was found that contain high concentrations lithium (Li) strontium (Sr), isolated cases arsenic (As). Low other metals man-made due to neutralizing effect carbonates host rocks ores, but this does not make them environmentally safe. content trace elements quarries relative background contents, well standards maximum permissible (MPC) chemicals for water bodies fishery importance sanitary hygienic indicators were determined. A distinctive feature lakes, reservoirs, is low species diversity zooplankton macrophytes, which small catchment area, steepness shores, absence shallow factors.