THE GENESIS OF THE THERMAL LAKE LOCATED WITHIN THE COASTAL AREA OF ITURUP ISLAND (THE KURILS)

The 3D model of tectonic fragmentation of the block of rock for the central part of Iturup Island has been developed to clarify the permeable zones of the upper part of the Earth’s crust. The use of the thermal infrared cameras allows us to image the bottom of Lake Utinaya Banya. The differential-leveling survey data helped us to develop the 3D model of the relief of the lake basin and the adjacent areas. We made chemical analyzes of waters and free gases released from the bottom of Lake Utinaya Banya. We revealed mineral composition of sediments collected during drilling in the area of the explosive event on the lake. Also we presented the conceptual model of the hydrothermal-magmatic system of the studied area. Thus, the obtained data suggest that Lake Utinaya Banya, located in the central part of Iturup Island may have been formed as the result of a series of hydrothermal eruptions. So, we can conclude that there is a risk of new hydrothermal explosions at Lake Utinaya Banya in the future.