R7: Petrology, Mineralogy and Economic geology (Joint Session with Society of Resource Geology)

[R7-06] Petrology of the serpentinized peridotite from Hayama Blet in Miura peninsula

*Natsue Abe^1,2 (1. JAMSTEC, 2. Kanazawa Univ.)

Keywords:Circum-Izu Serpentine Belt, Serpentinized peridotite, Hayama Group, Nobi Beach

We report the petrological characteristics of serpentinized peridotite from the Nobi Beach, southern zone of the Hayama Group in Miura Peninsula, one of Circum-Izu serpentinite belt. The Nobi Beach sample rarely has hydrous minerals with higher temperature (av. 980°C) and lower Fe3+/ΣCation than other Hayama Group samples. This suggests the serpentinized peridotites in the Hayama Group are either horizontally heterogeneous in the original mantle or differences in the peridotites' ascending and cooling processes.