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Volatile controls on magma ascent and eruption
2004Magma produced in arc environments is typically rich in volatile elements, particularly H2O. Volatile elements are sonamed because they dissolve in silicate melts at high pressures but form a gas at lower pressures. Formation of a free vapor phase creates overpressures in magma reservoirs and adds buoyancy that drives magma ascent; rapid near-surface ...
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Observations on the origins and ascent mechanisms of granitic magmas
Journal of the Geological Society, 1998This review presents a summary of most current beliefs about the origins of granitic magmas, together with calculations of some important properties of granitic melts and magmas. Turning attention to magma ascent mechanisms, diapirism and dyking represent two competing end-member models.
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Rheology of Granitic Magmas During Ascent and Emplacement
Annual Review of Earth and Planetary Sciences, 2003▪ Abstract  Considerable progress has been made over the past decade in understanding the static rheological properties of granitic magmas in the continental crust. Changes in H2O content, CO2 content, and oxidation state of the interstitial melt phase have been identified as important compositional factors governing the rheodynamic behavior of the ...
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Problem of Water Content in the Genesis and Ascent of Magma
1975The study of xenoliths from kimberlites and the mineral inclusions in diamonds suggests substantial upper-mantle differentiation down to at least 150 to 200 km. When hyperbasites are the prevailing rock type, the composition varies from diamond-bearing garnet olivinites to eclogite and grospydite.
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Crustal regime of deformation and ascent of granitic magma
Tectonophysics, 1995Abstract Structural studies and gravity data demonstrate the magma flow pattern of granitic plutons and their morphology at depth. The deepest zones calculated from gravity data, provided they show vertical lineations in outcrop, are interpreted as the feeder channels which fed the pluton. Their morphology at depth, as well as the position and number
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Determining the Effect of Varying Magmatic Volatile Content on Lunar Magma Ascent Dynamics
Journal of Geophysical Research E: Planets, 2021Giuseppe la Spina +2 more
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Explosivity of basaltic lava fountains is controlled by magma rheology, ascent rate and outgassing
Earth and Planetary Science Letters, 2021Giuseppe la Spina +2 more
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