JpGU-AGU Joint Meeting 2017

講演情報

[EE] ポスター発表

セッション記号 S (固体地球科学) » S-IT 地球内部科学・地球惑星テクトニクス

[S-IT22] [EE] 核-マントルの相互作用と共進化

2017年5月21日(日) 13:45 〜 15:15 ポスター会場 (国際展示場 7ホール)

コンビーナ:土屋 卓久(愛媛大学地球深部ダイナミクス研究センター)、寺崎 英紀(大阪大学大学院理学研究科)、Satish-Kumar Madhusoodhan(Department of Geology, Faculty of Science, Niigata University)、入舩 徹男(愛媛大学地球深部ダイナミクス研究センター)、Hernlund John(Earth-Life Science Institute, Tokyo Institute of Technology)、大谷 栄治(東北大学大学院理学研究科地学専攻)

[SIT22-P18] Viscosity of CO2-bearing sodium aluminosilicate melt at high pressure

*鈴木 昭夫1 (1.東北大学大学院理学研究科地学専攻)

キーワード:magma, volatile elements, carbon dioxide, maltle, high pressure, synchrotron radiation

Viscosity is one of the important transport properties controlling the migration of magma in the Earth's interior. Experimental and geochemical studies showed that magma in the deep interior was generated in the presence of CO2. However, our knowledge on the effect of CO2 on the viscosity of magma (silicate melt) is still insufficient. Here we report the viscosity of sodium aluminosilicate melt with jadeite composition containing 0.5 wt% of CO2 under high pressure. Viscosity was measured by the falling sphere method by using X-ray radiography image. Experiments were carried out using the MAX-III apparatus installed at the station NE7A of PF-AR synchrotron radiation facility in KEK (High Energy Accelerator Research Organization), Tsukuba, Japan. Viscosity was calculated using the Stokes equation with the correction of wall effect. Viscosity measurements were carried out up to 2.4 GPa. We observed that viscosity of the CO2-bearing melt was one order of magnitude lower than those of CO2-free jadeite melt. The temperature dependence of the melt is similar to that of the CO2-free jadeite melt.