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The Beginning: Mafic Magmas Invading Felsic Magma Chambers
2021The initial stages of magma interaction, i.e. the moment at which the two magmas come into contact, is a crucial point since the fate of magma mixing and its development in space and time largely depend on the outcome of this first encounter. In this chapter we discuss the possible fluid dynamic and thermodynamic processes developing during the ...
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Convection and mixing in magma chambers
Earth-Science Reviews, 1986Abstract This paper reviews advances made during the last seven years in the application of fluid dynamics to problems of igneous petrology, with emphasis on the laboratory work with which the authors have been particularly involved. Attention is focused on processes in magma chambers which produce diversity in igneous rocks, such as fractional ...
J.S. Turner, I.H. Campbell
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Magma mixing and convective compositional layering within the Vesuvius magma chamber
Bulletin of Volcanology, 1991The pumice-fall deposits of the last two Plinian eruptions of Vesuvius-a.d. 79 “Pompei” and 3700 b.p. “Avellino”-show a marked vertical compositional variation from white phonolite at the base to grey tephritic phonolite at the top. In both Avellino and Pompei sequences a compositional gap separates white from grey pumice.
CIVETTA, LUCIA, Galati R., Santacroce R.
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Dynamics of magma mixing in partially crystallized magma chambers
2014The Tertiary Austurhorn intrusive complex in SE Iceland represents an exhumed magma chamber that has recorded an extensive history of magma mixing and mingling. The basal part of the intrusion consists predominantly of granophyres that have been intensively and repeatedly intruded by more mafic magma.
Weidendorfer, Daniel +2 more
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Making magma chambers from mush
Science, 2017Volcanology Shallow magma chambers either erupt as volcanoes or solidify as intrusive magma bodies. These magma bodies are traditionally considered to be long-lived and dominated by melt. Cashman et al. review the evidence that shallow magma chambers are actually assembled quickly from much larger, crystal-rich transcrustal magmatic systems.
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The Roles of Heat and Gas in a Mushy Magma Chamber
Journal of Geophysical Research: Solid Earth, 2022Abstract Crustal magmatic systems likely consist of magmatic reservoirs dominated by crystal mush. Recent studies suggest that the physical processes occurring in crystal mush could alter the response of magmatic reservoirs during volcanic unrest.
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1993
Discussed herein are three major issues of debate regarding the dynamics of magma chambers: I. whether or not crystal settling is important II. whether or not magma densities drop during fractionation, and III. whether there is a Soret effect.
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Discussed herein are three major issues of debate regarding the dynamics of magma chambers: I. whether or not crystal settling is important II. whether or not magma densities drop during fractionation, and III. whether there is a Soret effect.
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Vibro-agitation of chambered magma
Journal of Volcanology and Geothermal Research, 2007Abstract We present the results of a novel set of calculations into the effect of in situ pressure reduction of a crystal-rich, basaltic magma layer by propagating seismic (P) waves. Three stages in the process are identified. Critically, an instability can arise such that a low pressure melt layer develops close to the floor in initially densely ...
M. Davis, M.A. Koenders, N. Petford
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The fluid dynamics of evolving magma chambers
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1984Abstract Recent developments in petrology indicate that fluid dynamic effects are of fundamental importance in controlling magma genesis. The forms of convection in magma chambers arise from compositional variations caused by processes such as fractional crystallization, partial melting and contamination, as well as from thermal ...
Robert Stephen John Sparks +2 more
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Simulation of Layered Magma Chambers
Journal of Geological Education, 1991The principles of magma addition and liquid layering in magma chambers can be simply demonstrated in the laboratory by dissolving colored crystals. The concepts of density stratification and apparent lack of mixing of miscible liquids is convincingly illustrated with hydrous solutions at room temperature.
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