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Journal Articles Geophysical Research Letters Year : 2022

Anomalous Behavior of Zirconium and Hafnium in Volcanic Fumarolic Fluids

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1
P. Censi
  • Function : Author
A. Caracausi
  • Function : Author
F. Sortino
  • Function : Author
M. Cangemi
  • Function : Author
D. Piazzese
  • Function : Author
V. Censi
  • Function : Author
E. Falcone
  • Function : Author

Abstract

The Zirconium and Hafnium concentrations in worldwide fumaroles fed by magmatic fluids reveal that the Zr/Hf ratio is inversely related to the temperature of emission. Lower Zr/Hf ratio values below the chondritic signature are found in fluids having the highest temperature while super-chondritic Zr/Hf ratio values are found in lower temperatures. Sub-chondritic values of the Zr/Hf ratio may be related to larger volatility of Hf-chloride gas species with respect to Zr-Cl gas species, while super-chondritic ratios may correspond to fluid-rock processes resulting from cooling of uprising magmatic fluids. We propose that sub-chondritic Zr/Hf ratio values in fumaroles associated with high temperature may be an appropriate marker of fast magmatic rising representing a new sensitive tool for volcanic risks strategies.
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insu-03746431 , version 1 (31-10-2022)

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P. Censi, P. Zuddas, A. Caracausi, F. Sortino, M. Cangemi, et al.. Anomalous Behavior of Zirconium and Hafnium in Volcanic Fumarolic Fluids. Geophysical Research Letters, 2022, 49, ⟨10.1029/2021GL094674⟩. ⟨insu-03746431⟩
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