Oxygen is the most abundant element in the Earth's crust, mantle, and fluids and therefore its
isotopic composition provides robust constraints on magma genesis. Application of oxygen …

Complex and protracted crystallization histories over geologic timescales are recorded in
accessory minerals (eg, zircon, allanite). Although magmatic crystallization was traditionally …

The largest accumulations of rhyolitic melt in the upper crust occur in voluminous silicic
crystal mushes, which sometimes erupt as unzoned, crystal-rich ignimbrites, but are most …

Concordant U–Pb zircon dates have been interpreted traditionally to date the crystallization
ages of plutons because until recently analytical uncertainties have generally been large …

Zirconium and Hf are nearly identical geochemically, and therefore most of the crust
maintains near-chondritic Zr/Hf ratios of~ 35–40. By contrast, many high-silica rhyolites and …

Abstract Hafnium, U, Th, and REE content of zircons from the Spirit Mountain batholith in
southern Nevada correlate with calculated temperatures from the Ti-in-zircon thermometer to …

The Earth's magmatism produces both volcanic and plutonic rocks. These two rock types
share many similarities, but also display significant differences that have led to a tendency to …

Multistage histories of incremental accumulation, fractionation, and solidification during
construction of large subvolcanic magma bodies that remained sufficiently liquid to erupt are …

Abstract Young (<∼ 65 ka) explosive silicic volcanism at Taupo volcano, New Zealand, has
involved the development and evacuation of several crustal magmatic systems. Up to and …

Intra-oceanic arcs are typically associated with intermediate (andesitic) cone volcanoes.
However, caldera volcanoes may also form in these settings from very large eruptions …