Decompression experiments identify kinetic controls on explosive silicic eruptions
Geophysical Research Letters
By: M. T. Mangan, T. W. Sisson, and W.B. Hankins
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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 (ΔPcritical) triggering gas bubble nucleation. High temperature and pressure decompression experiments using rhyolite and dacite melt reveal compositionally‐dependent differences in the ΔPcritical of degassing that may explain why rhyolites have fueled some of the most explosive eruptions on record.
| 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 |
| Contributing office(s) | Volcano Hazards Program |
| Google Analytic Metrics | Metrics page |