Magmatic Vapor Source for Sulfur Dioxide Released During Volcanic Eruptions: Evidence from Mount Pinatubo

Details Magmatic Vapor Source for Sulfur Dioxide Released During Volcanic Eruptions: Evidence from Mount Pinatubo Magmatic Vapor Source for Sulfur Dioxide Released During Volcanic Eruptions: Evidence from Mount Pinatubo

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994sci...265..497w&link_type=abstract

Science, Volume 265, Issue 5171, pp. 497-499

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42

Scientific paper

Sulfur dioxide (SO_2) released by the explosive eruption of Mount Pinatubo on 15 June 1991 had an impact on climate and stratospheric ozone. The total mass of SO_2 released was much greater than the amount dissolved in the magma before the eruption, and thus an additional source for the excess SO_2 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, SO_2-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 SO_2 that is released during many volcanic eruptions.

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