Hydrolysis and Complex Formation of Zr and Hf in Aqueous Solutions of HClO4, HCl, and NaOH in Equilibrium with Baddeleyite (Zr and Hf)O2(cr) at 250°C

Shikina, N. D.; Тагиров, Б. Р.; Bychkova, Ya. V.; Volchenkova, V. A.

doi:10.1134/s0036024418110377

Cited by 5 publications

(1 citation statement)

References 13 publications

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“…Zr/Hf values far from the chondritic range have been observed in hydrothermally altered rock (Iveson et al., 2018; Tiepolo et al., 2003) and in evolving peraluminous granites (Irber, 1999). Hydrothermal fluids usually show super‐chondritic Zr/Hf values (Censi et al., 2015; Censi, Raso, et al., 2017; Inguaggiato et al., 2015, 2016) because hydrolysis shares differently Zr and Hf aqueous complexes enhancing absorption of Hf onto surfaces of neogenic minerals (Byrne, 2002; Shikina et al., 2018). Zirconium and hafnium concentrations in magmatic fluids have been measured in condensates from fumarole fluids between 100°C and about 1,100°C (Taran et al., 1992, 1995, 2018; Garofalo, 2006; van Hinsenberg et al., 2015; Zelenski & Bortnikova, 2005; Zelenski et al., 2013, 2014).…”

Section: Introductionmentioning

confidence: 99%

Anomalous Behavior of Zirconium and Hafnium in Volcanic Fumarolic Fluids

Censi

Zuddas

Caracausi

et al. 2022

Geophysical Research Letters

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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"

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