Nizhne-Shсhapinsky Thermal Springs (Kamchatka) as an Example of Magnesium Carbon Dioxide Waters

• Published in: Russian journal of Pacific geology Vol. 18; no. Suppl 1; pp. S28 - S43
• Main Authors: Malik, N. A., Taran, Yu. A., Svirid, I. Yu, Tskhovrebova, A. R.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 2024; Springer Nature B.V
• Subjects: Calcium; Carbon dioxide; Carbonates; Chemical composition; Components; Earth and Environmental Science; Earth Sciences; Geology; Geothermal springs; Graben; Heated water; Hot springs; Magnesium; Rocks; Sodium; Sodium chloride; Strontium; Volcanoes; Kamchatka; carbon dioxide thermal waters; water–rock interaction; Shchapinsky graben
• ISSN: 1819-7140; 1819-7159
• DOI: 10.1134/S1819714024700180

The article presents the results of hydrochemical studies of the Nizhne-Shchapinsky (Kipely) carbon dioxide thermal (39°C) springs in 2021. The springs are discharged within the Shchapinsky graben near the active Kizimen volcano. The results include macro- and microcomponent composition, isotopic composition of source water, some free gas components, and dissolved strontium. The results are discussed using previously published and archive data, taking into account the geological and structural position of the area, water–rock interaction, as well as using simple thermochemical calculations in order to explain the rare, but characteristic of the chemical composition of some carbon dioxide waters, predominance of magnesium over calcium. It has been shown that the waters of the Nizhne-Shchapinsky springs are formed as a result of mixing of two components: deeper and more heated sodium chloride water and more surface, less heated water with the composition Mg–Ca– , formed due to interaction with carbonate-bearing rocks and CO 2 of igneous origin.