HYDROGEOCHEMISTRY OF THERMAL SOURCES, MUTNOVSKY VOLCANO,

In this paper the investigation results of thermal springs of the Mutnovsky Volcano (Kamchatka, Russia) are provided. Mud pots in the Donnoe Field of this volcano have a unique solution composition. High concentrations of a wide spectrum of chemical elements such as Al, Ti, V, Cr, Ni, Co, REE and PGE were discovered there. To explain the mechanisms of solution formation it was made an attempt to describe the fluid evolution and the resulting mixing waters by physical and mathematical modeling. A model illustrates fluid migration from magma chamber to the surface. It is shown that formation of brines corresponding to mud pots composition is possible under the secondary boiling border. THE SUBJECT OF STUDY The Mutnovsky Volcano is one the largest and the most active South Kamchatka volcanoes. It is 2323 m high. Two merged craters are located to the northwest and west of the summit (Fig. 1). The volcano holds multiple cones of neighboring explosions (Selyangin