高Al斜方千石についての実験的研究 : グラニュライト相変成岩中における斜方千石-スピネル-石英の安定関係についての一考察

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概要

• 論文の詳細を見る

• The solubility of alumina in orthopyroxene in a part of the join (Mg_<0.754>Fe_<0.246>)SiO_3-Al_2O_3 has been determined experimentally in a temperature range of 950-1200℃ at 10 and 15 kbar. The join studied consists of a single phase field of orthopyroxene solid solution (ss) and an assemblage of orthopyroxene (ss)+spinel (ss)+quartz. The alumina content of orthopyroxene coexisting with spinel and quartz increases with increasing temperature and pressure. The present results suggest, combined with previously published experimental data, that sapphirine-quartz and spinel-quartz are stable under the same temperature and pressure conditions of different starting compositions, where spinel-quartz is stable in the more Fe^<2+>-rich rock compositions. Considering Mg-Fe^<2+> partitioning relations between coexisting orthopyroxene, spinel, and sapphirine in the natural occurrences, it is inferred that an alumina content in orthopyroxene in sapphirine-quartz granulites would reach at the highest value when it coexists with spinel, sapphirine, and quartz.

• 横浜国立大学の論文
• 1987-10-31

著者

• 有馬 眞

  Geological Institute Yokohama National University

関連論文

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• 水の存在下, 1, 10および20kbar, 750℃における金雲母 -マンガン金雲母系の安定関係
• 高Al斜方千石についての実験的研究 : グラニュライト相変成岩中における斜方千石-スピネル-石英の安定関係についての一考察

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