Host: Japan Association of Mineralogical Sciences
Trace element contents of single fluid inclusions in quartz from miarolitic cavities, pegmatites, and quartz veins at the Kofu granite body, Yamanashi Pref., Japan, were analyzed by particle-induced X-ray emission (PIXE) to elucidate the compositional change of hydrothermal fluids during a migration in granite body. Most of fluid inclusions in the Kofu granite were two-phase inclusions (5-10 wt.% NaCl eq.), while polyphase inclusions (30-38% NaCl eq.) were also observed in hydrothermal quartz veins near the elevations of 1200 m. Determined contents are as follows: ∼8 wt.% for Cl, 2-6 wt.% for K and Ca, 1000-3000 ppm for Fe and Ba, 200-500 ppm for Mn, Zn, Pb, Cu, Br, and Ge, several tens ppm for Rb and Sr in the two-phase inclusions; ∼17 wt.% for Cl, 2-3 wt.% for K and Ca, 2000-10000 ppm for Fe, Mn, and Zn, 200-700 ppm for Pb, Cu, Br, Sr, Ba, and Rb, 20-30 ppm for Ge in the polyphase inclusions.
