Geochemistry of lanthanides in thermal waters of Issyk-Kul Lake Basin George Chelnokov, Natalia Kharitonova, Vasilii Lavrushin, Ivan Bragin and Altyn Aidarkozhina E3S Web Conf., 486 (2024) 05016 Published online: 07 February 2024 DOI: 10.1051/e3sconf/202448605016