Structure Features of Subsurface Channels of Anomalous Thermal Springs (Mutnovsky Volcano, South Kamchatka)

Abstract

Hydrogeochemical research of thermal springs in active volcanoes areas can help to study the fluid-magma systems and sources of elements in solutions. Mathematic simulation of fluid transport up to the surface can clarify the diversity of magma fluids in the surface. However, the geometry of subsurface fluid channels was not studied directly. Subsurface media structure and hydrogeochemical zoning of internal pore fluids is the crucial problem. The problem solving could explain the thermal springs origin. The electromagnetic frequency induction soundings were effected at Mutnovsky volcano at 2007 with NEMFIS (Near surface EM Frequency Induction Sounding) technique, developed in IPGG SB RAS (see Fig.1). The physical property of the media to be studied is the distribution of low electric resistance areas caused by highly mineralized waters into more resistive accommodating rocks. Such a geophysical task can be solved using NEMFIS technique (Manstein et al., 2000, Manstein et al., 2006). The aim of the work is to explore the structure of electric resistance up to the 6 m depth to study the geometry of subsurface channels of water transport up to the mud pots and fumaroles at the Donnoe field