Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9530997 | Journal of Volcanology and Geothermal Research | 2005 | 19 Pages |
Abstract
The eruption model is extended to include interaction between magma in the conduit and water in a surrounding aquifer. The phreatomagmatic eruption is also initiated by plug disruption. Two cases of initial aquifer pressure are considered: magmastatic and hydrostatic. These cases are valid for confined and unconfined aquifers. For the first case (confined aquifer), water influx influences the conduit flow soon after plug disruption and leads to the additional peaks of discharge rate; for the second case (unconfined aquifer), a purely magmatic, explosive eruption of longer duration is followed by a phreatomagmatic phase. In both cases, magma discharge rate increases by 10-100% in comparison with purely magmatic eruption.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geochemistry and Petrology
Authors
A.B. Starostin, A.A. Barmin, O.E. Melnik,