Anomalous Behavior of Zirconium and Hafnium in Volcanic Fumarolic Fluids

Paolo Censi (1) , Pierpaolo Zuddas (2) , Antonio Caracausi (3) , Francesco Sortino (4) , Marianna Cangemi (1) , Daniela Piazzese (1) , V Censi (1) , E Falcone (3)

1 DiSTeM - Dipartimento di Scienze della Terra e del Mare [Palermo]
2 METIS - Milieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols
3 INGV - Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Palermo
4 INGV - Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Catania

Fumaroles release natural fluids at the surface of volcanic areas allowing indirect investigations of melt transfer in volcanic plumbing systems. When magma rises, the composition of associated gas may change because of processes of magma degassing, temperature decreasing, fluids-rock exchanges, and shallow fluid mixing (Oppenheimer et al., 2014; Paonita et al., 2012). Variations in the volcanic gas composition may provide an understanding of quiescence to unrest transition announcing the arrival of potential volcanic events (Aiuppa et al., 2007; Oppenheimer et al., 2014; Paonita et al., 2016). Zirconium and hafnium are twin refractory trace elements with chemical coherence during magma crystallization reflecting the same ionic charge and almost the same radius (Niu, 2012; Shannon, 1976). They have a constant ratio in chondrites (the more abundant meteorites) corresponding to the so-called constant "chondritic"

Domaines: Chimie

Paolo Censi, Pierpaolo Zuddas, Antonio Caracausi, Francesco Sortino, Marianna Cangemi, et al.. Anomalous Behavior of Zirconium and Hafnium in Volcanic Fumarolic Fluids. Geophysical Research Letters, 2022, 49, ⟨10.1029/2021gl094674⟩. ⟨hal-03826798⟩