Abstract
Nepheline component (NaAlSiO4, 20 wt.%) was added to the join diopside(CaMgSi2O6)-acmite(NaFeSi2O6) and the phase relations were determined at 10-12 atm fO2 and 1050-1300°C. The liquidus lines for wustite and clinopyroxene cross each other at about 1160°C and the composition of Di24Ac56Ne20. The field of clinopyroxene + wustite + liquid extends from Di15Ac75Ne20 to Di40AC40Ne20 at 1050°C. In the Di-rich region the phase relations are complicated. Olivine appears as second phase, but disappears at lower temperatures (<1100°C). Melilite (<1200°C) and nepheline (<1150°C) are present at lower temperature region and coexist with olivine and/or clinopyroxene. -Authors
| Original language | English |
|---|---|
| Pages (from-to) | 123-126 |
| Number of pages | 4 |
| Journal | Journal of Mineralogy, Petrology and Economic Geology |
| Volume | 87 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Jan 1 1992 |
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All Science Journal Classification (ASJC) codes
- Environmental Science(all)
- Earth and Planetary Sciences(all)
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The system diopside-acmite-nepheline at low oxygen fugacity. / Onuma, K.; Ikeda, S.; Ohtani, E.; Kato, Takumi.
In: Journal of Mineralogy, Petrology and Economic Geology, Vol. 87, No. 4, 01.01.1992, p. 123-126.Research output: Contribution to journal › Article
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TY - JOUR
T1 - The system diopside-acmite-nepheline at low oxygen fugacity
AU - Onuma, K.
AU - Ikeda, S.
AU - Ohtani, E.
AU - Kato, Takumi
PY - 1992/1/1
Y1 - 1992/1/1
N2 - Nepheline component (NaAlSiO4, 20 wt.%) was added to the join diopside(CaMgSi2O6)-acmite(NaFeSi2O6) and the phase relations were determined at 10-12 atm fO2 and 1050-1300°C. The liquidus lines for wustite and clinopyroxene cross each other at about 1160°C and the composition of Di24Ac56Ne20. The field of clinopyroxene + wustite + liquid extends from Di15Ac75Ne20 to Di40AC40Ne20 at 1050°C. In the Di-rich region the phase relations are complicated. Olivine appears as second phase, but disappears at lower temperatures (<1100°C). Melilite (<1200°C) and nepheline (<1150°C) are present at lower temperature region and coexist with olivine and/or clinopyroxene. -Authors
AB - Nepheline component (NaAlSiO4, 20 wt.%) was added to the join diopside(CaMgSi2O6)-acmite(NaFeSi2O6) and the phase relations were determined at 10-12 atm fO2 and 1050-1300°C. The liquidus lines for wustite and clinopyroxene cross each other at about 1160°C and the composition of Di24Ac56Ne20. The field of clinopyroxene + wustite + liquid extends from Di15Ac75Ne20 to Di40AC40Ne20 at 1050°C. In the Di-rich region the phase relations are complicated. Olivine appears as second phase, but disappears at lower temperatures (<1100°C). Melilite (<1200°C) and nepheline (<1150°C) are present at lower temperature region and coexist with olivine and/or clinopyroxene. -Authors
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U2 - 10.2465/ganko.87.123
DO - 10.2465/ganko.87.123
M3 - Article
VL - 87
SP - 123
EP - 126
JO - Journal of Mineralogy, Petrology and Economic Geology
JF - Journal of Mineralogy, Petrology and Economic Geology
IS - 4
ER -