Rare-earth elements and isotopic geochemistry of thermal waters of the Okhotsk sea shore, Far East of Russia

• Published in: IOP Conference Series: Earth and Environmental Science
• Main Authors: Bragin, I.V., Chelnokov, G.A., Kharitonova, N.A., Veldemar, A.A., Pavlov, A.A.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: IOP Publishing 2020
• Subjects: Okhotsk; Paratunka; Talaya; Kamchatka; okhotsk sea; Sakhalin
• Online Access: http://dx.doi.org/10.1088/1755-1315/467/1/012092; https://iopscience.iop.org/article/10.1088/1755-1315/467/1/012092/pdf; https://iopscience.iop.org/article/10.1088/1755-1315/467/1/012092

Abstract New data on hydrogeochemistry of thermal waters of the Okhotsk sea-shore (Ulskiy, Annensky Tumnin, Talaya, Paratunka, Dagi and Lesogorsky) is presented in the paper. Sikhote-Alin ridge thermal waters with crystalline host rocks refer to sulfate-hydrocarbonate or hydrocarbonate sodium fresh waters with elevated silicon content (up to 41 ppm), lowest TDS (<0.3 g/L), alkaline (9.1 Eh>-157 mV). Geological conditions were proved by shapes of REE patterns (positive Eu-anomaly for sedimentary basins). Stable water isotopes led us to divide roughly studied waters into two groups, using peculiarities of moisture source for water recharge areas. First group: Tumin, Annensky and Talaya with more “continental” climate as for mainland thermal waters, forming isotopically lighter water and second group: Ulskiy, Paratunka, Dagi and Lesogorsky, with “marine” climate of Sakhalin and Kamchatka, forming isotopically heavier water.