Udokan copper deposit in the Chita region

USSR. Chita Region. A sample of ore from the Udokan copper deposit, mined by geologists of the Udokan geological exploration party. The Udokan geological exploration party was engaged in detailed additional exploration of the Udokan copper deposit, the optimal option for mining and ore processing technology, and preparation for the industrial development of an open pit mine. Grigory Kalachyan/TASS