Silver, Lynn and Stolper, Edward
A Thermodynamic Model for Hydrous Silicate Melts.
Journal of Geology, 93
- Published Version
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A simple thermodynamic model describing hydrous silicate melts has been applied to the systems albite-, diopside-, and silica-H_2O. The model is based on the assumption of ideal mixing of hydroxyl groups, H_2O
molecules, and oxygens in the melt. Calculated and experimentally determined freezing-point depressions
and H_2O solubilities for these systems are in agreement over substantial pressure and temperature intervals.
The success of this model in accounting for observed phase equilibria of hydrous systems and its consistency
with spectroscopic measurements of the concentrations of H-bearing species in glasses suggests that
it accurately represents the interaction between H_2O and silicate melts at a molecular level.
|Additional Information:||© 1985 by The University of Chicago.
We have benefited
from discussions with A. L. Boettcher, T. S. Bowers, and I. S. E. Carmichael and from reviews by M.S. Ghiorso and A. Navrotsky. Supported by NSF Grant EAR-8212765. Division of Geological and Planetary Sciences Contribution #4124.|
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|Caltech Division of Geological and Planetary Sciences||4124|
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|Deposited On:||22 Aug 2012 16:35|
|Last Modified:||09 Dec 2016 20:56|
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