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

[S1R6-09] Reactivation processes of shallow magma reservoir in latest magmatic eruption, Azuma volcano

*Masao Ban¹, Shun Kanno¹, Motohiro Sato¹, Takumi Imura¹ (1. Yamagata University)

Keywords:mushy body, remobilization, intermediate magma, mixing-mingling, Azuma volcano

Petrologic study of the latest magmatic unit in Azuma volcano was performed to reveal reactivation processes of the shallow mushy magma. The mushy body acquired repeated injections of mafic magmas from depth and partly remobilized. The mobilized part was mixed with the mafic magma to form intermediate magmas. The mobilized and intermediate parts grew over time. When growing front of these reached near the top part of mushy body, these were mixed/mingled and erupted by further injection of mafic magma.