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Solubilities of nitrogen and noble gases in basalt meltNitrogen and noble gases are important tracers in geochemistry and chosmochemistry. Compared to noble gases, however, physicochemical properties of nitrogen, such as solubility in melt or melt/silicate partition, are not well known. Solubility of nitrogen in basalt melt depends on redox condition of the atmosphere. For example, solubility of nitrogen in E chondrite melt under reducing conditions is as high as 2 mol percent at 1500 C, suggesting that nitrogen is chemically dissolved in silicate melts, i.e., being dissolved as free anions or replacing oxygen sites in silicate network. However, the solubility and the dissolution mechanism of nitrogen under oxidizing conditions are not well investigated. To obtain nitrogen solubility in silicate melts under various redox conditions and to understand its mechanism, we are conducting experiments by using (15)N(15)N-labeled nitrogen gas. This makes it easy to distinguish dissolved nitrogen from later contamination of atmospheric nitrogen, and hence enables us to measure the nitrogen solubility accurately. As a preliminary experiment, we have measured solubility of nitrogen in basalt melt under the atmospheric oxygen pressure.
Document ID
19950015390
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Miyazaki, A.
(Tokyo Univ.)
Hiyagon, H.
(Tokyo Univ.)
Sugiura, N.
(Tokyo Univ.)
Date Acquired
September 6, 2013
Publication Date
January 1, 1994
Publication Information
Publication: Lunar and Planetary Inst., Conference on Deep Earth and Planetary Volatiles
Subject Category
Geophysics
Accession Number
95N21807
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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