S1/R6 合同セッション：火成作用の物質科学/深成岩・火山岩・サブダクション ファクトリー

[S1R6-12] Natural and numerical considerations of water budget of the caldera-forming magmas in Naruko volcano, Northeast Japan

「発表賞エントリー」

*Alexey Kotov¹, Satoshi Okumura¹, Kenji Shimizu², Isoji Miyagi³, Masaoki Uno¹, Noriyshi Tsuchiya¹ (1. Tohoku Uni, 2. Jamstec, 3. AIST)

キーワード：Caldera eruptions, Water content, Water flux, Rhyolite-MELTS

This study aims to establish the petrological features of the origin of magmas from two caldera eruptions of the Naruko volcano and estimate the volume of H2O accumulated in the magma chamber. Our results explain the PT parameters of the origin of these magmas, as well as mineralogical features. Calculating the magma's water budget makes it clear how much H2O was accumulated in them.