| This dissertation research involved three projects, all directed at improving our understanding of the sources and processes contributing to the formation of subduction-related volcanic rocks from Kamchatka, Russia and the Aleutian Islands, Alaska. The first project was a petrologic and geochemical study of rare peridotite xenoliths from Shiveluch volcano, the northernmost active composite cone of the Kamchatka arc. The results from this study indicate that interaction between ascending magmas and peridotite wall rock at shallow mantle depths plays a significant role in creating and modifying the uppermost mantle and deepest crust in some subduction settings. The second project used whole-rock and mineral composition data from high Mg... |
