File No. 012
Masahiro YASUHARA (�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ)
From Oct.
1997 to present
�ｿｽ�ｿｽ�ｿｽN�ｿｽ�ｿｽ�ｿｽ�ｿｽ (Birthday)�ｿｽC�ｿｽ�ｿｽ�ｿｽ�ｿｽ (sex)�ｿｽF
1974�ｿｽN7�ｿｽ�ｿｽ3�ｿｽ�ｿｽ (3. July. 1974)�ｿｽC�ｿｽj�ｿｽ�ｿｽ (Male)
�ｿｽo�ｿｽg�ｿｽn (Location)�ｿｽC�ｿｽ�ｿｽ�ｿｽ�ｿｽ (Country)�ｿｽF
�ｿｽ�ｿｽ�ｿｽ�ｿｽ (Nagasaki)�ｿｽC�ｿｽ�ｿｽ�ｿｽ{ (Japan)
�ｿｽ�ｿｽ�ｿｽﾈ厄ｿｽ (Specialized
subject)�ｿｽF
�ｿｽn�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽw (geochemistry)�ｿｽC�ｿｽﾎ山�ｿｽw (Volcano logy)
�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽw�ｿｽ�ｿｽ (Membership
of society)�ｿｽF
American
Geophysical
�ｿｽw�ｿｽ�発�ｿｽ\ (Presentation at society)�ｿｽF
�ｿｽgOrigin of
Trachytic Rocks of Aso Volcano on
Volcanic Front in
Central Kyushu, Japan�ｿｽh (poster session, AGU, 1998)
�ｿｽ_�ｿｽ�ｿｽ (Theses)�ｿｽF�ｿｽﾈゑｿｽ (nothing)
e-mail�ｿｽF[email protected]
ICQ�ｿｽ@�ｿｽF�ｿｽ@51389872�ｿｽ@�ｿｽ@�ｿｽ@�ｿｽ@
�ｿｽ�ｿｽ�ｿｽﾝの鯉ｿｽ�ｿｽ�ｿｽ�ｿｽe�ｿｽ[�ｿｽ} (Theme of research)�ｿｽFGeochemical evolution
of Aso caldera, central Kyushu Japan
�ｿｽR�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽg (Comment of theme)�ｿｽF�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽﾌカ�ｿｽ�ｿｽ�ｿｽf�ｿｽ�ｿｽ�ｿｽﾍほぼ１�ｿｽ�ｿｽﾌ包ｿｽ�ｿｽﾎゑｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽﾄゑｿｽ�ｿｽ�ｿｽﾌに対ゑｿｽ�ｿｽﾄ，�ｿｽ�ｿｽ�ｿｽh�ｿｽJ�ｿｽ�ｿｽ�ｿｽf�ｿｽ�ｿｽ�ｿｽﾍ４�ｿｽ�ｿｽﾌ托ｿｽK�ｿｽﾍな包ｿｽ�ｿｽﾎゑｿｽ�ｿｽN�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽﾄゑｿｽ�ｿｽ�ｿｽD�ｿｽ�ｿｽK�ｿｽﾍ珪�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽﾎ山�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽﾍ難ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽﾅ会ｿｽ�ｿｽx�ｿｽ�ｿｽ�ｿｽN�ｿｽ�ｿｽ�ｿｽ闢ｾ�ｿｽ�ｿｽﾌゑｿｽ�ｿｽ�う�ｿｽ�ｿｽ�ｿｽH�ｿｽS�ｿｽ�ｿｽﾌ包ｿｽ�ｿｽﾎゑｿｽ�ｿｽN�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ}�ｿｽO�ｿｽ}�ｿｽﾌ擾ｿｽﾔゑｿｽm�ｿｽ驍ｽ�ｿｽﾟ，�ｿｽ�ｿｽ�ｿｽﾌマ�ｿｽO�ｿｽ}�ｿｽﾌ会ｿｽ�ｿｽw�ｿｽg�ｿｽ�ｿｽ�ｿｽﾌ趣ｿｽ�ｿｽﾔ変会ｿｽ�ｿｽ�ｿｽ�ｿｽﾏ察�ｿｽ�ｿｽ�ｿｽ�ｿｽD(Many calderas have been formed by almost 1 large-scale pyroclastic
flow. But the Aso caldera has been
formed by 4 large-scale pyroclastic flow.
Is the large-volume felsic volcanism able to erupt repeatedly in the
same place? Therefore, I will observe the time evolution of the chemical
composition of this magma.)
�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽﾍゑｿｽ�ｿｽﾟゑｿｽ�ｿｽ�ｿｽ�ｿｽ@ (Motivation)�ｿｽF�ｿｽﾎ山�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽﾍ，�ｿｽ�ｿｽ�ｿｽﾝでゑｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽﾉ起�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽﾄゑｿｽ�ｿｽ骭ｻ�ｿｽﾛでゑｿｽ�ｿｽ�ｿｽC�ｿｽﾜゑｿｽ�ｿｽC�ｿｽl�ｿｽﾔにとゑｿｽ�ｿｽﾄ様�ｿｽX�ｿｽﾈ影�ｿｽ�ｿｽ�ｿｽ�ｿｽ^�ｿｽ�ｿｽ�ｿｽ�ｿｽD�ｿｽ�ｿｽ�ｿｽﾌよう�ｿｽﾈ派�ｿｽ�ｿｽﾈ奇ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽN�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽｾゑｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽ�ｿｽD(The volcanic activity is the phenomenon that is breaking out
actively in the present and also cause various influence to the human beings. I
want to clarify the cause of such a showy activity. )