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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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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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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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Convection and Macrosegregation in Magma Chambers
1992Magmas accumulate in large reservoirs where convection occurs, driven by density differences due to fractional crystallization and temperature variations. The observations consist of igneous rocks representing the final crystallized product and volcanic lava series.
S. R. Tait, C. Jaupart
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Temperatures of entering magma, formation and dimensions of magma chambers of volcanoes
Bulletin Volcanologique, 1982A mechanism, of formation of magma chambers that feed volcanoes is discussed. Heat conditions and dimensions of magma chambers which have existed for more than several thousand years may become stable. The approximate equations of heat balance of these chambers are derived by calculating the temperatureT1 of the magma entering chambers and the radiia ...
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Formation of crystal magma chambers in Iceland
Geology, 1986Formation of crustal magma chambers in Iceland may be facilitated by the occurrence of stress barriers that lead to formation of thick sills. Such sills absorb the magma of all dikes that enter them and may evolve into magma chambers. Ideal sites for stress barriers, and hence for magma chambers, are rock formations where individual layers have ...
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Volcanoes, Volcanic Rocks and Magma Chambers
1984Volcanoes are hills, mounds or sheets of relatively localized igneous rock assemblages made up of pyroclastic rocks, lava flows, and intrusions in varying proportions. Volcanoes differ notably in their geometry, volume, and relative amounts of pyroclastic rocks and lava flows, with differences mostly dependent upon eruptive mechanisms and rates of ...
Richard V. Fisher, Hans-Ulrich Schmincke
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