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

Alexey Kotov

Presentation information

Oral presentation

S1/R6 Joint session: Earth materials science related to igneous processes/Plutonic rocks, volcanic rocks and subduction factory

Sun. Sep 18, 2022 9:00 AM - 12:15 PM B351 (Adv. Edu. Res. Bldg. E-3F)

Chairperson: Atsushi Kamei(Shimane Univ.), Tatsuhiko Kawamoto(Shizuoka Univ.), Morihisa Hamada(JAMSTEC), Masao Banno(Yamagata Univ.)

12:00 PM - 12:15 PM

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

[Presentation award entry]

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

Keywords: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.