Modeling Zircon growth during open-system crystallization

Lorenzo Tavazzani (1) , Rita Economos (1) , Jörn-Frederik Wotzlaw (2) , Oscar Laurent (2, 3) , Cyril Chelle-Michou (4) , Olivier Bachmann (2)

1 Southern Methodist University Dallas
2 Institute of Geochemistry and Petrology [ETH Zürich]
3 GET - Géosciences Environnement Toulouse
4 Institute of Geophysics [ETH Zürich]

Recent advances in zircon geochronology by isotope dilution thermal-ionization mass spectrometry (ID-TIMS) techniques allow for age precision beyond the 0.02 % level for single zircon 206Pb/238U dates [1] and can resolve zircon crystallization heterogeneities in a dispersed age population. As zircon saturation is dependent on melt temperature and composition, quantitative analysis of dispersed zircon age populations can provide insight into the timing and magnitude of intensive parameter variations during the lifetime of magma reservoirs.

Domaines: Sciences de la Terre; Géochimie; Pétrographie; Volcanologie

Lorenzo Tavazzani, Rita Economos, Jörn-Frederik Wotzlaw, Oscar Laurent, Cyril Chelle-Michou, et al.. Modeling Zircon growth during open-system crystallization. GSA Connects 2021 in Portland, Oregon, The Geological Society of America, Oct 2021, Portland, Oregon, United States. Paper n° 37-6, ⟨10.1130/abs/2021AM-367757⟩. ⟨hal-03865191⟩