Decoupling of zircon U–Pb and trace-element systematics driven by U diffusion in eclogite-facies zircon (Monviso meta-ophiolite, W. Alps)

Volume: 175, Issue: 6
Published: May 14, 2020
Abstract
Zircon is widely used to date metamorphic processes, particularly due to slow cation diffusion under crustal conditions. Here, we present laser-ablation depth profiling data that demonstrate rapid U diffusion in partially altered, high-pressure zircon. The zircons are hosted in metagabbros that underwent eclogite-facies (~ 550 °C, ~ 2.6 GPa) recrystallization during subduction of the Monviso meta-ophiolite. One metagabbro contains only newly...
Paper Details
Title
Decoupling of zircon U–Pb and trace-element systematics driven by U diffusion in eclogite-facies zircon (Monviso meta-ophiolite, W. Alps)
Published Date
May 14, 2020
Volume
175
Issue
6
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