Navoi Mining and Metallurgical Combinat, Navoi, Uzbekistan:
I. O. Khamroev, Deputy Chief Geologist for Main Activity, Candidate of Geologo-Mineralogical Sciences, i.hamroev@ngmk.uz

The article gives a detailed characteristic of gold reserves of four mine managements within the structure of the Navoi Mining and Metallurgical Combinat, Republic of Uzbekistan: Central, North, South and Hydrometallurgical Works 1 Managements, Navoi. The major mineral objects of the Central Mine Management are the Muruntau and Myutenbai deposits developed by the opencast method. Discovery of the former – the unique Muruntau deposit – was acknowledged by the international geological society as the greatest event in the second half of the 20^th century in the area of gold mining, and became the first-string milestone on the way of industrial and social development in the wild areas in the west of Uzbekistan. The current depth of Muruntau open pit mine is 600 m, while the project depth of the joint opencast workings (with Myutenbai) is down to 1000 m. The reserves of the North Mine Management are composed of the Kokpatas and Daugyztau deposits under open pit mining. The major reserves (up to 80 %) are represented by rebellious gold and sulphide ore subjected to processing by bacterial leaching. Hydrometallurgical Works 1 Management was founded in 2012. Previously (in 1993), based on the vacant uranium production capacities, a process line was created at the Works for nonprofitable gold ore from the Muruntau deposit. Later on, the Works was supplied by ore reserves from the Ziaetdin and Aristantau deposits developed mostly by the opencast method. The mineral deposits of the South Mine Management are situated in the south of the country. They are mostly mined out using the hybrid method: open pit at the top and underground at the bottom. The remote Mardzhanbulak open pit gold mine has its own processing plant. The problem of this mining area is depletion of the reserves as the ultimate project pit limit is reached and the volume of stripping is increased. The problem is solved by means of revision of the project pit limits, prospecting of new reserves and amendment of mineral quality standards.

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