Relationships between metasomatic minerals and fluid inclusions in sub-arc mantle xenoliths from Iraya volcano, the Philippines

Abstract

Peridotite xenoliths from Iraya volcano, the Philippines, are known as metasomatite by SiO₂-rich aqueous fluids (and melts). The petrographic features are similar to those of Avacha peridotite xenoliths, containing abundant H₂O fluid inclusions, and it is expected that the Iraya xenoliths also contain a large amount of H₂O inclusions. We would like to discuss about the relationships between the general features of H₂O fluid inclusion and petrographical features (presence or absence of metasomatic minerals and their mode of occurrence) of host peridotite xenoliths.