Journal ArticleDOI
Magma mixing: a mechanism for triggering acid explosive eruptions
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Injection of basic magma into acid magma causes superheating of the acid and vigorous convection as discussed by the authors, which can lead to an explosive acid eruption in volcanic edifices.Abstract:
Injection of basic magma into acid magma causes superheating of the acid magma and vigorous convection. Vesiculation induced by convection and increased magma pressure fractures the volcanic edifice triggering an explosive acid eruption. The 1875 plinian eruption of Askja, Iceland is an example of an explosive eruption triggered by magma mixing.read more
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Gradients in silicic magma chambers: Implications for lithospheric magmatism
TL;DR: In this article, the authors studied the effect of pre-emptive and preemptive gradients in T and O 2 in a variety of compositionally zoned ash flow tuffs.
Journal ArticleDOI
Long-period volcano seismicity: its source and use in eruption forecasting
TL;DR: At an active volcano, long-period seismicity reflects pressure fluctuations resulting from unsteady mass transport in the sub-surface plumbing system, and hence provides a glimpse of the internal dynamics of the volcanic edifice as mentioned in this paper.
Journal ArticleDOI
Vertically extensive and unstable magmatic systems: A unified view of igneous processes
TL;DR: The evidence that shallow magma chambers are actually assembled quickly from much larger, crystal-rich transcrustal magmatic systems is reviewed, infering that igneous processes differ substantially in the lower and upper crust.
Journal ArticleDOI
Magmatism of the British Tertiary Volcanic Province
TL;DR: In this article, the authors focus on those aspects of research into the magmatism of the British Tertiary Volcanic Province (BTVP) which have seen rapid accumulation of data and changes of views during the last few years.
Journal ArticleDOI
Thermal and mechanical constraints on mixing between mafic and silicic magmas
R. S. J. Sparks,L.A. Marshall +1 more
TL;DR: In this article, the viscosity and crystal content of mafic and silicic magmas are compared as a function of their initial temperatures and the proportion of the mafics in the mixture.
References
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Book
The mathematics of diffusion
TL;DR: Though it incorporates much new material, this new edition preserves the general character of the book in providing a collection of solutions of the equations of diffusion and describing how these solutions may be obtained.
Journal ArticleDOI
Finite amplitude convective cells and continental drift
Donald L. Turcotte,E. R. Oxburgh +1 more
TL;DR: In this paper, a solution was obtained for steady, cellular convection when the Rayleigh number and the Prandtl number are large, and the theory was used to test the hypothesis of large scale convective cells in the earth's mantle.
Journal ArticleDOI
Magma mixing: petrological process and volcanological tool
TL;DR: Magma mixing is a widespread, if not universal igneous phenomenon of variable importance as discussed by the authors, and the evidence for mixing is found primarily in glassy tephra; the consolidation of lava obscures the evidence.
Journal ArticleDOI
Water and magmas; a mixing model
TL;DR: A model for the mixing of H2O and silicate melts has been derived from the experimentally determined effects of H 2O on the viscosity (fluidity), volumes, electrical conductivities, and especially the thermodynamic properties of hydrous aluminosilicate melts as mentioned in this paper.
Journal ArticleDOI
Comments on viscosity, crystal settling, and convection in granitic magmas
TL;DR: The effect of H 2 O on viscosity of silicate melts is now known as mentioned in this paper, and most granitic melts are expected to have viscosities between 10 8 and 10 5 poises at temperatures at or above the liquidus.
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Thermal and mechanical constraints on mixing between mafic and silicic magmas
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