COASTAL THERMAL SPRINGS IN THE CENTRAL PART OF ITURUP ISLAND: MACRO- AND MICROELEMENT COMPOSITION

Based on the results of expeditionary studies (July 2021), geochemical features thermal waters (natural manifestations and borehole waters) discharging near or directly Sea Okhotsk Pacific coasts central part Iturup Island were considered: Reidovskie, Lososevye, Cape Konakov, Goryachie Klyuchi, Dachnye, water-recreational complex «Vannochki». The springs (with exception Lososevye) belong to subneutral Cl(Cl-HCO3)-Na with salinity less than 10 g/l. Lososevye are weakly acidic HCO3-SO4-Ca-Na type 3 spontaneous gas is dominated by CO2 (Dachnye Vannochki), N2 (Reidovskie Konakov) CH4 (Goryachie Klyuchi). Against background a general extremely low content microelements, enriched boron lithium. characterized small (0.1 l/s) insignificant (0.02–0.05 flow rates, while wells drilled nearby uncover horizons pressurized waters.