A Novel Approach to Identifying Mantle‐Equilibrated Zircon by Using Trace Element Chemistry

Abstract

 This study has established a multidimensional filter scheme to select mantle-equilibrated zircon using trace element chemistry alone  The local melt redox states have been estimated from zircon using Ti-in-zircon thermometry and Ce/Ce* oxybarometry  This proposed filter scheme has been validated with external datasets and derived mantle redox states around ∆FMQ since the early Earth Accepted Article This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as

Machine-learning oxybarometer developed using zircon trace-element chemistry and its applications

“…Oxygen fugacity (fO 2 ) is a fundamental thermodynamic property governing the speciation and behavior of multivalent elements (e.g., S, Ce, Eu, Fe, and V) during magma evolution, which in turn controls their solubility, mobility, and compatibility in silicate magmas (Brounce et al 2014;Ni et al 2020). Estimates of fO 2 have been used to help address a range of important questions, including the compositional evolution of the atmosphere (Trail et al 2011b;Lee and Bachmann 2014) and the mineralization potential of igneous rocks (Jugo et al 2010;Sillitoe 2010;Richards 2015).…”