Water-Methane Geothermal Reservoirs in a South-West Foothills of Koryaksky Volcano, Kamchatka

Abstract

The Ketkinsky geothermal reservoirs appears to be the product of magma and water injection from the Koryaksky volcano. Actual thermal supply may be carried out by magma injections in the form of sills in the depth range of -6 to -3 km abs. from the SW sector of the Koryaksky volcano. Water supply according to the isotopic composition of water is mixed: it is carried out through the structure of the Koryaksky volcano from above 2 km abs. and at the expense magmatic fluids. The system of the identified productive faults and magma fracking system is geometrically conjugated through some of the existing faults. Well E1 located above of the magma-hydrothermal connection above mentioned demonstrates water level change sensitivity to magma fracking events of Koryaksky volcano 2008-2009. Thus, Ketkinsky geothermal field appears to be the product of magma and water injection from the Koryaksky volcano.