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Self-organization in convective magma mixing
Earth-Science Reviews, 1990Abstract Convective magma mixing is driven by thermal and compositional effects on melt density. We investigated the role of compositional buoyancy in convective magma mixing by means of two-dimensional numerical simulation. Two kinds of self-organization phenomena were observed in our simulations: (1) temporally-local unmixing events associated with
C OLDENBURG, F SPERA, D YUEN
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The Development of Magma Mixing in Space and Time
2021In this chapter we will provide an explanation for the occurrence of magmatic enclaves and flow structures observed in the rocks. According to numerical simulations and physical experiments, the formation of enclaves and flow structures tightly reflects the dynamics occurring in the magmatic masses.
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Torfajökull: A volcano dominated by magma mixing
Geology, 1984All postglacial (less than 10 000-yr-old) rhyolite eruptions from Iceland9s largest silicic center show evidence of admixture with basaltic magmas. The degrees of mixing vary from rare inclusions within host rhyolites to completely homogeneous blends with hybrid compositions.
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Magma mixing as a source for Pinatubo sulphur
Nature, 1997On 15 June 1991, a huge plinian eruption at Mount Pinatubo discharged 3.7–5.3 km3of pyroclastic material1, along with a minimum of 17 megatonnes of SO2 gas2,3. This represents the largest stratospheric SO2 cloud ever measured, and the SO2 generated in this eruption is believed to have had a significant effect on global climate2,4 and the ozone layer4 ...
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Simulation of magma mixing in refilled magma chambers driven by gas exsolution [PDF]
, 2006 The dynamics of convection in volatile-rich replenished magma chambers is studied by means of numerical simulations. Simulations are carried out with an appositely developed advanced finite element numerical code, named GALES, which solves the fundamental mass, momentum and energy equations for 2D transient, multicomponent, compressible to ...
Longo A. +3 more
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The magma mixing origin of mantled feldspars
Contributions to Mineralogy and Petrology, 1981The key to mantled feldspar genesis is epitaxial nucleation of plagioclase on K-feldspar or K-feldspar on plagioclase. Once this nucleation takes place there is a relatively straightforward process of crystal growth yielding “rapakivi” and “antirapikivi” textures.
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Decrypting Magma Mixing in Igneous Systems
Reviews in Mineralogy and Geochemistry, 2022Laumonier, Mickael +3 more
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