Host: Japan Association of Mineralogical Sciences
Morphological study was performed on a quartz-hosted fluid inclusion collected from the Sanbagawa metamorphic belt, by using a Focused Ion Beam micro-sampling and X-ray CT (BL47XU, SPring-8). The observed shape of the inclusion appears “negative crystal” of the quartz, satisfying the law of constancy of interfacial angles of alpha-quartz. Based on the liquid/bubble ratio of CT-volumetric data, we estimated the bulk density of the inclusion which would preserve the density at 300ºC (Küster & Stöckhert, 1997). The estimated density (260MPa at 300ºC) is consistent with exhumation P-T path (>400ºC) of previous studies.