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Vol.XX, Nos.2-3 >

Effect of Oxygen Fugacity on Fassaitic Pyroxene

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Title: Effect of Oxygen Fugacity on Fassaitic Pyroxene
Authors: Onuma, Kosuke Browse this author
Issue Date: Feb-1983
Publisher: 北海道大学
Journal Title: 北海道大学理学部紀要
Journal Title(alt): Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy
Volume: 20
Issue: 2-3
Start Page: 185
End Page: 194
Abstract: Stability of fassaitic pyroxene in the system CaMgSi2O6-CaFeAlSiO6-CaAl2SiO6-CaTiAl2O6 is discussed on the basis of published data. In the system CaMgSi2O6-CaFeAlSiO6 the stability field of clinopyroxene decreases with an increase in CaFeAlSiO6 content and a decrease in oxygen fugacity at constant temperature. The stability field of clinopyroxene in the system CaMgSi2O6-CaAlFeSiO6-CaAl2SiO6 is strongly influenced by oxygen fugacity at low and high pressure and decreases with respect to CaFeAlSiO6 component. Titanium content of the clinopyroxene does not seem to be affected by the change of oxygen fugacity when magnetite is stable. These data are probably useful in evaluating the condition under which natural fassaitic pyroxenes are formed.
Type: bulletin (article)
URI: http://hdl.handle.net/2115/36716
Appears in Collections:Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy > Vol.XX, Nos.2-3

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