Dynamics of some geochemical indicators of the holy spring in Komsomolets settlement of Michurinsk-science town in Tambov Region
Mineralogical and chemical composition of spring water is determined by a number of factors, including the filtration of water through soil. The object of the study is the Holy Spring in Komsomolets settlement of Michurinsk -naukograd in Tambov region. The holy spring is located in an unnamed spring tract, the area of which is 0.060 km<sup>2</sup>. The tract with the source is lacustrine-plain, steep and hilly. The geographical coordinates of the spring are 52°56'30.5" north latitude and 40°28'07.9" east longitude. It is a type of highly mineralized, low-debit springs of ground interstitial water. Seasonal fluctuations of production rate (0.561 ^ 1.240 m<sup>3</sup>/hour), temporary hardness of water (5.70 ÷ 6.26 mmol/l) are determined, water composition is established for a number of other indicators. According to the total hardness (11.0 mmol/l) and nitrates (122 mg/l), the maximum permissible concentrations of salts are observed. Small values of oxidability make it possible to state the absence of rotting processes of organic residues in spring water. The weight of the dry residue in water is 864 mg/l, і.е. it is highly mineralized and belongs to the carbonate-chloride-sulphate type, contains nutritional elements: manganese, silicon, fluorine, calcium, has a pleasant taste. Based on the morphology of the crystals, the results of X-ray phase analysis of the samples, it can be concluded that crystals include the following the minerals: gypsum (CaSO4 <sup>x</sup> 2H2O composition), calcite (CaCO3 composition), aragonite (CaCO3 composition) and probably halite (NaCl composition).