Magmatic Phases I

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Magmatic Phases - I
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Magmatic Phases - II
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Conceptual Models of Silicate Melts
From Carmichael et al. 1974
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Specific Volume of Pure Water
Geothermal Gradient
Critical Point
From Burnham et al., 1969
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Specific Volume of Water vs. Pressure
specific volume 1 / r
0.1 g/cm3
rmagma 2.2 g/cm3
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Magmatic Volatile Reservoirs
PH2O lt Pf
Px Py Pz
Isostatic Lithostatic pressure
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Water Solubility vs. Pressure
Cold-Seal bomb
Pressure medium
Platinum capsule contains melt dissolved
volatiles
To pump to increase pressure
From Moore et al., 1998
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Depolymerization of Silicate Melts
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Speciation of Water in Silicate Melts
H2O O2- 2OH- in melt in
melt
From Silver et al., 1990
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CO2 Solubility in Silicate Melts
aSiO2
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Pressure Effects on Volatile-rich Systems
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Volatiles and Eruptions
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(No Transcript)
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Explosive Eruptions