Last Update 08/29 2003
Research: In the Magma Research Group, various studies on magmas have been conducted based on field studies and high pressure experiments. Temporal variations in magmatic composition of several active volcanoes have been studied to understand the mode of their future eruptions. Studies on the genesis of primary magmas have been conducted to understand the thermal condition and the chemical composition of upper mantle. Experimental studies on magmas at high pressures have also targeted to understand the crystallization process of the magma ocean in the early stage of the Earth. As we recently found aqueous fluids behave like magma at high pressure, aqueous fluids in mantle condition became our research targets. Our recent research themes are as follows. (1) Temporal variations of magmatic compositions of Fuji, Izu-Oshima, and MIyake-jima volcanoes, (2) Role of water in the crystallization of island-arc magmas, (3) Petrological study of Miyakejima 2000 eruption, (4)Magmatological study of explosive volcanic eruptions of Mt Fuji, (5) Experimental study on the genesis of continental flood basalt magma, (6) Experimental study of the composition and the behavior of aqueous fluid in the mantle. Publications: 安田 敦・中田節也・藤井敏嗣, 三宅島2000年噴火噴出物のmelt inclusionに記録されたマグマのS濃度とfO2環境, 火山, 46, 4, 165--173, 2001. 安田 敦, プルームを読む（川勝均編「地球科学の新展開１：地球ダイナミクスとトモグラフィー」，p161-189）, 朝倉書店, 2002. |
