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The solubility of carbon monoxide in silicate melts at high pressures and its effect on silicate phase relationsAutoradiographic analysis and gas chromatography were used to measure the solubility in silicate melts of CO-CO2 vapors (30 to 40% CO by thermodynamic calculation) in equilibrium with graphite at temperatures up to 1700 deg C and pressures to 30 kbar. At near-liquidus temperatures CO-CO2 vapors were found to be slightly more soluble than CO2 alone. As a result of the apparently negative temperature dependence of CO solubility, the solubility of CO-CO2 at superliquidus temperatures is less than that of CO2. Melting points of two silicates were depressed more by CO than by CO2. Phase boundary orientations suggest that CO/CO + CO2 is greater in the liquid than in the vapor. The effect of the presence of CO on periodotite phase relations was investigated, and it was found that melts containing both CO and CO2 are nearly as polymerized as those containing only CO2. These results suggest that crystallization processes in planetary interiors can be expected to be about the same, whether the melts contain CO2 alone or CO2 and CO.
Document ID
19790054541
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Eggler, D. H.
(Pennsylvania State University University Park, Pa., United States)
Mysen, B. O.
(Pennsylvania State Univ. University Park, PA, United States)
Hoering, T. C.
(Carnegie Institution of Washington Washington, D.C., United States)
Holloway, J. R.
(Arizona State University Tempe, Ariz., United States)
Date Acquired
August 9, 2013
Publication Date
May 1, 1979
Publication Information
Publication: Earth and Planetary Science Letters
Volume: 43
Issue: 2, Ma
Subject Category
Lunar And Planetary Exploration
Accession Number
79A38554
Funding Number(s)
CONTRACT_GRANT: NSF EAR-77-15704
CONTRACT_GRANT: NSG-7465
CONTRACT_GRANT: NSF DES-73-00266-A01
Distribution Limits
Public
Copyright
Other

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