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

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Date: July 22, 1994
From: Science(Vol. 265, Issue 5171)
Publisher: American Association for the Advancement of Science
Document Type: Article
Length: 2,328 words

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Abstract :

Sulfur dioxide ([SO.sub.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.sub.2] released was much greater than the amount dissolved in the magma before the eruption, and thus an additional source for the excess [SO.sub.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.sub.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.sub.2] that is released during many volcanic eruptions.

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Source Citation   

Gale Document Number: GALE|A15650650