Even subtle changes in viscosity alone (~0.5 log Pa/s) in these instances as a result of heating, crystallization or compositional changes may determine the eruptive style21. Effusive–explosive transitions within single eruptive episodes Where both eruptive styles exist with a single eruption ...
In the quiescent periods, magma chamber processes are likely to play a major role in controlling the style of the next eruption, by modifying the properties of the magmas. Crystallinity, viscosity, dissolved water content and the water saturation state of the melt are among the properties that ...
The ascent conditions of the magma affected its rheological behavior through variations in the degassing, viscosity and fragmentation. On the other hand, distance to the source, depositional time, volcanic evolution and environmental conditions are factors that affect the chemical composition of collected...
Various intrusion geometries and eruption styles have been observed and classified on the Earth and this range primarily represents differences in magma composition, viscosity, volatile content (abundance and type), magma/rock density contrast, magma cooling behavior, effusion rate, atmospheric pressure an...
We find that for a given volcanic system, parameters that control magma viscosity, such as initial water mass fraction, initial crystal volume fraction, and temperature, have the greatest influence on whether or not magma fragments during ascent and erupts explosively. We also define a 'critical ...
Images of Europa's surface taken by the Galileo Solid State Imager (SSI) show smooth features measuring a few kilometers, potentially resulting from eruptions of low-viscosity material such as liquid cryomagma. We estimated the volume of four of these smooth features by producing digital elevation...
The ascent conditions of the magma affected its rheological behavior through variations in the degassing, viscosity and fragmentation. On the other hand, distance to the source, depositional time, volcanic evolution and environmental conditions are factors that affect the chemical composition of collected...
Finally, we find that whilst variations in initial CO2 concentration can affect the temperature, pressure and viscosity profiles along the conduit, they do not alter the macroscopic behaviour of the system.G. La SpinaM. BurtonM. de' Michieli Vitturi...
This consequence yields a simple criterion of the eruption style that displays the ranges of explosive and effusive eruptions on the viscosity鈥損ermeability plane separated by a boundary line that shifts following the size and geometry type of the conduit....
In this work, we compare different permeability models for low viscosity magmas using a 1D steady-state model. We use, as a test case, the 2007 effusive eruption at Stromboli volcano, Italy. We compare the numerical solutions computed using the linear Darcy's law with those obtained using ...