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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy >
Vol.XVIII, No.3 >
Preliminary Report on the Join CaMgSi2O6-CaFe^[3+]AlSiO6 at Low Oxygen Fugacity
| Title: | Preliminary Report on the Join CaMgSi2O6-CaFe^[3+]AlSiO6 at Low Oxygen Fugacity |
| Authors: | Oba, Takanobu Browse this author | | Onuma, Kosuke Browse this author |
| Issue Date: | Mar-1978 |
| 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: | 18 |
| Issue: | 3 |
| Start Page: | 433 |
| End Page: | 444 |
| Abstract: | The join CaMgSi2O6-CaFe^[3+]AlSiO6 was studied by the ordinary quenching method at 10^-9, 10^-10, and 10^-11 atm fO2. The solubility limit of CaFe^[3+]AlSiO6 in diopside is 20 mol.% at 1100℃ and 10^-9 atm fO2, 10 mol.% at 1100℃ and 10^-10 atm fO2 and 5 mol.% at 1100℃ and 10^-11 atm fO2. The temperature of upper limit for clinopyroxene(ss) single phase field decrease with decreasing fO2. The phase assemblages below the solidus temperatures in this join change as follows with increasing CaFe^[3+]AlSiO6: clinopyroxene(ss), clinopyroxene(ss) + melilite, clinopyroxene(ss) + melilite + spinel(ss), clinopyroxene(ss) + melilite + spinel(ss) + anorthite. The composition of clinopyroxene(ss) crystallized from the composition Di(50)FATs(50) at 1100℃, 10^-10 atm fO2 is Ca0.96 (Mg0.48Fe0.12^[2+]Fe0.26^[3+]Al0.14) (Al0.44Si1.56)O6. |
| Type: | bulletin (article) |
| URI: | http://hdl.handle.net/2115/36664 |
| Appears in Collections: | Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy > Vol.XVIII, No.3
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