[S-IT17] 地球型惑星内部での液体の特性とその役割

[SIT17-P03] Density of Fe₂O₃–bearing magma under high pressure

*坂 凜太郎¹、鈴木 昭夫¹、坂巻 竜也¹ (1.東北大学大学院理学研究科地学専攻)

キーワード：マグマ、下部マントル、浮沈法、部分モル体積

Previous studies indicate the high concentration of Fe₂O₃ in the lower mantle. Even though the partial molar volume of Fe₂O₃ has become essential for discussing the magma in the deep mantle, there is no data of partial molar volume of Fe₂O₃ at high pressure and temperature. This study is aimed to obtain partial molar volume of Fe₂O₃ in silicate melts under high pressure. Fe₂O₃ -bearing starting material was compressed by a Kawai-type multi-anvil apparatus. We determined the density of silicate melts using sink-float method. By combining the density and the equation of state of silicate melts proposed in Wakabayashi and Funamori (2013), partial molar volumes were yielded.