Abstract
It has been determined that the content of dissolved fluorides in waters of 13 mud volcanoes of the Kerch-Taman Region varies within 0.13–2.00 mg/L and averages 0.87 mg/L (n = 37). We have revealed a rather close correlation of the fluorine concentration with pH (r = 0.80) and the absence of its relationship with the mineralization and the content of components of the basic salt composition. It is suggested that the fluorine concentration in mud-volcano waters is controlled by the exchange reaction \({{\bar {F}}}\) + OH– = F– + \(\overline {{\text{OH}}} \), where \({{\bar {F}}}\) and \(\overline {{\text{OH}}} \) are the contents of adsorbed and structural fluorine (hydroxyl ions) in clay minerals, and F– and OH– are the concentrations of fluorides (hydroxyl ions) in the water phase.
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This work was supported by the Russian Foundation for Basic Research, projects nos. 18-05-01133 and 18-05-00818.
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Translated by I. Bel’chenko
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Savenko, A.V., Bychkov, A.Y., Poltavskaya, S.V. et al. Fluorine in the Waters of Mud Volcanoes in the Kerch-Taman Region. Moscow Univ. Geol. Bull. 76, 230–234 (2021). https://doi.org/10.3103/S0145875221020083
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DOI: https://doi.org/10.3103/S0145875221020083