Home > Research > Publications & Outputs > Halogen (Cl, F) release during explosive, effus...

Electronic data

  • Schipper et al 2019 Caulle halogens Volcanica

    Rights statement: https://www.jvolcanica.org/ojs/index.php/volcanica/policies

    Final published version, 85 MB, PDF document

    Available under license: CC BY: Creative Commons Attribution 4.0 International License

Links

Text available via DOI:

View graph of relations

Halogen (Cl, F) release during explosive, effusive, and intrusive phases of the 2011 rhyolitic eruption at Cordón Caulle volcano (Chile)

Research output: Contribution to journalJournal articlepeer-review

Published
  • C. Ian Schipper
  • Jonathan Castro
  • Ben Kennedy
  • Bruce Christenson
  • Alessandro Aiuppa
  • Brent Alloway
  • Pablo Forte
  • Gilles Seropian
  • Hugh Tuffen
Close
<mark>Journal publication date</mark>11/05/2019
<mark>Journal</mark>Volcanica
Issue number1
Volume2
Number of pages18
Pages (from-to)73-90
Publication StatusPublished
<mark>Original language</mark>English

Abstract

We investigate sulphur, chlorine and fluorine release during explosive, effusive and intrusive phases the 2011 Cordón Caulle eruption, with a focus on halogen devolatilization. Petrological analysis shows halogen release to have been promoted by isobaric crystallization in slowly-cooled magma that was emplaced in a lava flow and sub-vent intrusion. Fluorine in particular mobilized only after extensive groundmass crystallization and incipient devitrification. By 2017, the gas emitted from vent-proximal fumaroles had hydrothermal compositions, with HCl/HF ratios decreasing with decreasing temperature. We estimate that the eruption could eventually emit up to 0.84 Mt of SO2, 6.3 Mt of HCl, and 1.9 Mt of HF, but only ~7% and ~2% of total HCl and HF were emitted during explosive phases, and significant halogens are yet to be released from the intrusion. Halogen devolatilization and its associated hazards can persist long after the cessation of rhyolite eruptions with complex magma emplacement mechanisms.