Experimental constraints on Zr stable isotope fractionation during magmatic zircon crystallization

A community-led calibration of the Zr isotope reference materials: NIST candidate RM 8299 and SRM 3169

“…Because of the rapid expansion of the Zr isotope system, multiple Zr isotope standards have been proposed, in particular for the characterization of mass-dependent effects, such as the SRM 3169 (ref. 26,[29][30][31][32][33][34][35], the candidate RM 8299 presented herein, [7][8][9]11,12,[36][37][38] a single-element Zr solution from PlasmaCal (SCP Science) also known as the IPGP-Zr standard, 5,6,10,11,30,33,35,[38][39][40][41][42][43][44][45][46] and the NRC ZIRC-1 (ref. 44, 47 and 48).…”

“…As the eld of (mass-dependent) zirconium (Zr) stable isotopes is starting to develop (e.g., ref. [5][6][7][8][9][10][11][12], it is in the community's best interest to establish and rigorously calibrate an iRM early on, before multiple 'in-house' standards proliferate.…”

Linking Significant Zr Isotopic Fractionation in Magmatic Zircons With Petrographic Textures

“…These contrasting Zr isotopic fractionation behavior in different magmatic zircons is hard to explain by Rayleigh equilibrium fractionation. Alternatively, experiments and modeling calculations based on the first principle advocated that diffusion‐driven kinetic fractionation during zircon growth exerts the main control (Chen et al., 2020; Guo et al., 2022; Kirkpatrick et al., 2023; Méheut et al., 2021; Tompkins et al., 2023), which, however, still needs more direct natural sample testing.…”