Ultrahigh-temperature (UHT; T max≥ 900° C) metamorphism requires unusually high heat
in continental crust at depths of 15–55 km, but how such extreme thermal conditions are …

Rutile is the most common naturally occurring titanium dioxide polymorph and is widely
distributed as an accessory mineral in metamorphic rocks ranging from greenschist to …

The Th/U ratios of zircon crystals are routinely used to help understand their growth
mechanism. Despite the wide application of Th/U ratios in understanding the geological …

Ultrahigh temperature (UHT) metamorphism is the most thermally extreme form of regional
crustal metamorphism, with temperatures exceeding 900° C. UHT crustal metamorphism is …

The models recognize that ZrSiO 4, ZrTiO 4, and TiSiO 4, but not ZrO 2 or TiO 2, are
independently variable phase components in zircon. Accordingly, the equilibrium controlling …

Quartz and rutile were synthesized from silica-saturated aqueous fluids between 5 and 20
kbar and from 700 to 940° C in a piston-cylinder apparatus to explore the potential pressure …

Water plays a critical role in erosion and sediment transport and this relationship is most
evident in the hyperarid Atacama Desert of Northern Chile, a region characterized by …

Ages retrieved from accessory minerals in high-grade metamorphic rocks place important
constraints on the timing of events and the rates of tectonometamorphic processes operating …

Thermobarometry, the estimation of the pressure–temperature (P–T) conditions of
metamorphism, can be undertaken by using pseudosection calculations as well as by …

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 …