Abstract
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.
