Datasets from Upper-Crustal Magma Evolution at Intermediate Arc Systems: Uranium-Series Zircon Chronochemistry of the Unzen Volcanic Complex, Southwestern Japan

Crystal-rich (40~50 vol.%) intermediate lava has been the primary eruptive product of several recent hazardous eruptions: Mt. Pinatubo, Philippines (1991), Soufriere Hills, Montserrat (1995-present), and Unzen, Japan (1990-1995). Despite this association with such devastating eruptions, the formation, timing, and evacuation of such magma is not well understood: do such eruptions tap a long-lived, multi-cycle crystal mush, or, is it generated in a single magmatic cycle prior to eruption? This thesis explores this question through research...
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