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Decompression experiments identify kinetic controls on explosive silicic eruptions

Geophysical Research Letters

By:
, ,
DOI: 10.1029/2004GL019509

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Abstract

Eruption intensity is largely controlled by decompression-induced release of water-rich gas dissolved in magma. It is not simply the amount of gas that dictates how forcefully magma is propelled upwards during an eruption, but also the rate of degassing, which is partly a function of the supersaturation pressure (??Pcritical) triggering gas bubble nucleation. High temperature and pressure decompression experiments using rhyolite and dacite melt reveal compositionally-dependent differences in the ??Pcritical of degassing that may explain why rhyolites have fueled some of the most explosive eruptions on record.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Decompression experiments identify kinetic controls on explosive silicic eruptions
Series title:
Geophysical Research Letters
DOI:
10.1029/2004GL019509
Volume
31
Issue:
8
Year Published:
2004
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geophysical Research Letters