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This article examines the composition and geochemical evolution of groundwaters developed in volcanic areas: the first region characterized by modern volcanic activity (eastern Kamchatka and Kuril Islands), and the second in eastern Sikhote-Alin where volcanism terminated in the upper Cretaceous–Paleocene. Despite the meteoric source of these groundwaters, its geochemical features in volcanic areas are heavily affected by the impact from external sources, as well as the duration of the water-rock interaction and the water/rock ratio

Geochemical Evolution of Groundwaters of the Far-East Russian Volcanic Belts: Kamchatka & Kuril Islands and Sikhote-Alin Mountains