R6: Plutonic rocks, volcanic rocks and subduction factory

[R6P-04] Petrological characteristics of the Habu granodiorite in the Kuga Group, eastern Yamaguchi Prefecture.

[Presentation award entry]

*Yusaku AKIMOTO¹, Masaaki OWADA¹, Mariko NAGASHIMA¹ (1. Yamaguchi Univ.)

Keywords:Habu granodiorite , Kuga group, magma mingling

The Habu granodiorite is composed of a marginal facies bearing hornblende and a main facies lacking hornblende. The main facies includes dusty-zoned plagioclase grains at the periphery of marginal facies. Based on the occurrence of the granodiorite and its petrography, the main facies of Habu granodiorite, at first, intruded the Kuga Group, then the marginal facies magma was emplacement on the high structural level of the main facies preserving the fluidal state.