Geochemistry of mineral waters and gasses of the Mukhen deposit (the Far East)
The paper cites new data on hydrochemistry of two types of cold high pCC>2 carbonaceous mineral waters from the Mukhen spar (Khabarovsky Territory). The first type of the groundwater belongs to Ca-Mg-ÍÑÎç type with a relatively low TDS (1.7 g/1) and contains high concentrations of Fe2+, Mn2+, Ba2+, and SiO2. The second type is of HCO3-Na composition with a high TDS of about 14 g/1, and is enriched in Li+, B, Sr2+, Br-, and Ã. New data on oxygen (<518O) and hydrogen (<52H) isotopes in water, and <513C (TIC) in the gas phase along with the detailed analysis of geology and hydrogeology of the study area allow us to solve the problem of the mineral water origin and evolution. Based on the obtained on tritium content (3H) in the surface and groundwaters, an estimation was made of mineral waters circulation. It was established that the formation of Na-ÍÑÎç waters was the result of interaction between meteoric waters and water-holding rocks with the active participation of CO2 under conditions of slow water exchange, whereas the formation of the HCO3-Ca-Mg water type suggested a rather more rapid water exchange.