| Summary: | x, 80 p. ill., maps. A print copy of this title is available through the UO Libraries under the call numbers: SCIENCE QE523.K57 A94 2007 Klyuchevskoy volcano, located in Kamchatka's subduction zone, is one of the most active arc volcanoes in the world and contains some of the highest 8180 values for olivines and basalts. I present an oxygen isotope and melt inclusion study of olivine phenocrysts in conjunction with major and trace element analyses of 14C and tephrochronologically-dated tephra layers and lavas spanning the eruptive history and the AI-Mg compositional range of the basalt to basaltic andesites found at Klyuchevskoy. A hybrid model of moderately-high 8180 silicate melt from the subducting slab, coupled with high 8180 fluid is provided to best explain Klyuchevskoy's 1) voluminous, high-rate volcanism, 2) unusual high-8180 signature, 3) two endmember basaltic magma, and, 4) hydrous high-AI, high-8180 component. Adviser: Paul Wallace
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