A numerical program for steady-state flow of magma-gas mixtures through vertical eruptive conduits
January 1, 2000
This report presents a model that calculates flow properties (pressure, vesicularity, and some 35 other parameters) as a function of vertical position within a volcanic conduit during a steady-state eruption. The model idealizes the magma-gas mixture as a single homogeneousfluid and calculates gas exsolution under the assumption of equilibrium conditions. These are the same assumptions on which classic conduit models (e.g. Wilson and Head, 1981) have been based. They are most appropriate when applied to eruptions of rapidly ascending magma (basaltic lava-fountain eruptions, and Plinian or sub-Plinian eruptions of intermediate or silicic magmas) that contains abundant nucleation sites (microlites, for example) for bubble growth.
Citation Information
Publication Year | 2000 |
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Title | A numerical program for steady-state flow of magma-gas mixtures through vertical eruptive conduits |
DOI | 10.3133/ofr00209 |
Authors | Larry G. Mastin, Mark S. Ghiorso |
Publication Type | Report |
Publication Subtype | USGS Numbered Series |
Series Title | Open-File Report |
Series Number | 2000-209 |
Index ID | ofr00209 |
Record Source | USGS Publications Warehouse |
USGS Organization | Cascades Volcano Observatory; Volcano Science Center |