Magmatic vapor source for sulfur dioxide released during volcanic eruptions: Evidence from Mount Pinatubo

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Abstract

Sulfur dioxide (SO2) released by the explosive eruption of Mount Pinatubo on 15 June 1991 had an impact on climate and stratospheric ozone. The total mass of SO2 released was much greater than the amount dissolved in the magma before the eruption, and thus an additional source for the excess SO2 is required. Infrared spectroscopic analyses of dissolved water and carbon dioxide in glass inclusions from quartz phenocrysts demonstrate that before eruption the magma contained a separate, SO2-bearing vapor phase. Data for gas emissions from other volcanoes in subduction-related arcs suggest that preeruptive magmatic vapor is a major source of the SO2 that is released during many volcanic eruptions.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Magmatic vapor source for sulfur dioxide released during volcanic eruptions: Evidence from Mount Pinatubo
Series title Science
DOI 10.1126/science.265.5171.497
Volume 265
Issue 5171
Year Published 1994
Language English
Publisher Science
Contributing office(s) Volcano Hazards Program
Description 3 p.
First page 497
Last page 499