UPPER CRETACEOUS-EOCENE VOLCANISM OF THE KRONOTSKIY PALEOARC (KAMCHATKA)
New data on geochemistry, rear elements and isotopic conposition of the Kronotskiy paleoarc volcanic complexes were analyzed. Certain palaeoarc segments were revealed. Santonian-Campanian-Maastrichtian and Eocene volcanic complexes in the different segments were formed in the front zone of the Kronotskiy palaeoarc arc. Formation of the Cretaceous volcanic complexes in the southern palaeoarc segment, which is peculiar for its calc-alcali volcanites, is related to the geodynamical peculiarities of the subduction zone including less rate of melting and its deeper location. Low potassium tholeiite basalts mark the beginning of intra arc rift stage.