one of the classes of hydro-thermal deposits of useful minerals, formed at a maximum depth at high temperature (300° C to 500° C) and pressure. Hypothermal deposits were first defined by the American geologist W. Lindgrem in 1907.
REFERENCESSmirnov, V. I. Geologiia poleznykh iskopaemykh, 2nd ed. Moscow,1969.
V. I. SMIRNOV