Relationship between Kamen Volcano and the Klyuchevskaya group of volcanoes (Kamchatka)

► Geochemical data on previously unstudied Kamen Volcano (Kamchatka) are presented. ► Geochemical variations in rocks of Klyuchevskaya Group are investigated. ► Gradual depletion with time of NMORB-mantle below Klyuchevskaya Group is shown. ► Fluid composition can be different even at neighbouring volcanoes. ► Bezymianny volcano inherited the Kamen magma plumbing system.