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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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Magma mixing in alkaline magmas: An example from Tenerife, Canary Islands
Lithos, 1994Abstract The central region of Tenerife (Canary Islands) offers a wide variety of alkaline rocks of intermediate composition between basalts and more differentiated magmas. A recent (less than 0.1 Ma old) eruption on the southwestern slopes of Teide volcano produced separate felsic (SiO 2 ∼59%) and mafic (SiO 2 ∼47%) rocks as well as abundant hybrid ...
V. Araña +4 more
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Magma Mixing in Igneous Systems 
2022<p>Since the first hypothesis, evidences of magma mixing processes have been accumulated in the literature allowing this natural phaenomenon to be defined as fundamental petrological processes playing a role in activating volcanic eruptions and generating compositional variability in igneous systems.
Daniele Morgavi +3 more
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Interfacial turbulent mixing in stratified magma reservoirs
Journal of Volcanology and Geothermal Research, 1996Abstract We analyse the interfacial turbulent mixing of molten magmas in a two-layer stratified convecting magma chamber. We examine situations where convection is driven by the heat and/or compositional flux associated with the melting of a solid boundary.
Cardoso, SSS, Woods, AW
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Illegitimate magmas of the Galápagos: Insights into mantle mixing and magma transport
Geology, 1999Roughly 1–2% of the flows erupted from flank vents of the western Galapagos shield volcanoes have anomalous compositions. We call these illegitimate magmas because of their uncertain parentage. Because some illegitimate magmas are compositionally indistinguishable from lavas of an adjacent volcano and erupt from the flank facing the adjacent volcano ...
Dennis Geist +3 more
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Role of viscous folding in magma mixing
Chemical Geology, 2018Abstract Magma mixing is a complex phenomenon and occurs through the interplay of a number of processes. Recent developments in microfluidics and chaotic mixing experiments have enabled us to better understand the complex processes associated with magma mixing from the hybrid rocks of the Ghansura Rhyolite Dome (GRD) of Proterozoic Chotanagpur ...
Bibhuti Gogoi, Ashima Saikia
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The mixing and mingling of magmas
Endeavour, 1997Abstract Some volcanic eruptions may be triggered by the mixing and mingling of magmas. Envisioned mixing events under volcanoes comprise intertwined physical and chemical processes. Recent advances have unravelled some possible mechanisms.
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Water and magmas; a mixing model
Geochimica et Cosmochimica Acta, 1975Abstract A model for the mixing of H2O and silicate melts has been derived from the experimentally determined effects of H2O on the viscosity (fluidity), volumes, electrical conductivities, and especially the thermodynamic properties of hydrous aluminosilicate melts.
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Magma mixing in a squeezed conduit
Earth and Planetary Science Letters, 1987Abstract The mixing of mafic and silicic magmas in a squeezed conduit is simulated by fluid dynamics experiments using glue and dilute glycerin in a squeezed vinyl tube. Lighter and more viscous glue initially stably overlies dilute glycerin in a tube.
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The Fingerprint of Magma Mixing in Minerals
2021Disequilibrium textures in minerals are common in igneous rocks and can be caused by variations in pressure, temperature, or composition that perturbed a pre-existing state of equilibrium of the magma body. Although the variation of intensive variables can be invoked as the triggering factor, there is evidence that disequilibrium did not propagate ...
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