ISSN 2071-2227, E-ISSN 2223-2362, Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 2019, № 5 5 © Mizernaya M. A., Miroshnikova A. P., Pyatkova A. P., Akilbaeva A. T., 2019 GEOLOGY M. A. Mizernaya 1 , Cand. Sc. (Geol.-Min.), orcid.org/0000-0001-8618-7352, A. P. Miroshnikova 2 , PhD, orcid.org/0000-0002-2710-7049, A. P. Pyatkova 1 , orcid.org/0000-0001-5974-9698, A. T. Akilbaeva 1 , orcid.org/0000-0002-6093-8530 1 ‒ D. Serikbayev East Kazakhstan State Technical Universi- ty, Ust-Kamenogorsk, the Republic of Kazakhstan, e-mail: mizernaya58@bk.ru 2 ‒ “VNIItsvetmet”, Afliate of RSE “NC CPMRM RK”, Ust-Kamenogorsk, the Republic of Kazakhstan, e-mail: an- astasiya-2588@mail.ru THE MAIN GEOLOGICAL-INDUSTRIAL TYPES OF GOLD DEPOSITS IN EAST KAZAKHSTAN Purpose. To characterize leading geological-industrial types of gold deposits within Kazakhstani part of the Great Altai. Methodology. Field studies are within proper gold ore and ore-bearing deposits. Sampling is carried out for defning chemical composition and regularities of basic ore minerals and impurities distribution. Microprobe analysis by using a scanning election microscope JSM 6390LV, comparative analysis of ore mineralization were applied at the studied deposits. Findings. Gold ore deposits of the Great Altai were formed within the period from the end of Riphean to the end of Phanerozoe time in diferent geodynamic conditions. The most productive ones are O 3 , D 1-2 , C and K 2 age boundaries. Island arc, ensimatic, ensialic, volcanogenic-sedimentary and collision environments are of great interest for gold mineralization. The most important sources of gold mineralization within the Great Altai are gold-base metals, gold-quartz, gold-sulphide-quartz deposits. Part of medium and small deposits can be transferred to the higher rank after additional evaluation. Moreover, prerequisites for discover- ing new deposits are far from being exhausted in traditional ore mining regions. Complex gold-base metals (polymetallic and copper-lead-zinc) deposits of Rudny Altai belt also have high content of associated gold and silver. Originality. The research novelty is in using of highly precise methods for studying ores and host rocks that can be used for the development of low-cost technologies for qualitative evaluation of gold ore deposits that were formed in diferent geodynamic conditions and time intervals on the basis of mineralogical sampling method, topo-mineralogy method, which enables one to solve the task of replenishing mineral-raw materials of precious metals in Kazakhstan. Practical value. For the last 15 years there has been a clear tendency towards increase in the world demand and gold production. Although the world gold reserve base features abundant types of deposits, development of gold mining has slowed down in Kazakh- stan since 1990-s due to depletion of the richest and favorable deposits, decrease in gold raw material quality, and increase in negative impact on the environment. Extra study on the known gold ore objects, search for gold deposits from the aspect of integrated develop- ment imply the aim of overall accounting of basic and secondary components when all the stages of operation are carried out – rang- ing from geological-estimating and to operational exploration. Nowadays, up-to-date technologies of concentration, and develop- ment methods enable to refer these deposits to the objects of primary commercial exploitation. Their studying has scientifc value in the issues of endogenetic mineralization and creates prerequisites of discovering new perspective areas and deposits in Kazakhstan. Keywords: metallogenic specialization, Ore Belt, gold deposits, Central Asia, Great Altai, Kazakhstan UDC 553.07 Introduction. According to the generally accepted concept [1, 2], basic geological structures of the Great Altai are located in the north [west of the Central Asian mobile belt. They are separated by deep-seated faults of north-west direction from Caledonian structures of the Gorny Altai (by Loktevsko- Karairtysh fault in the north-east) and from Chingiz-Tarbaga- tai by Chingiz-Saur fault (in the south-west) [3, 4]. According to metallogenic zoning inside of the GA the fol- lowing ore belts are distinguished in geologic structures of the GA within East Kazakhstan: gold-copper-polymetallic (Rud- ny Altai); rare metal (Kalba-Narym); gold ore (West Kalba); multimetal (Zharma-Saur). Their total length is more than 1000 km whereas their average width is 300 km (Fig. 1) [5, 6]. Commercial mineralization is localized in the Rudny Altai zone that is characterized by high femicity of the section, high magma saturation and ore density. Epicenters of ore areas and clusters tend to thickening of metabasalt layer (thickness is 20‒24 km) and to ridge-like elevating of surface M (40‒43 km deep) [7, 8]. Basic geological-industrial types of gold ore deposits. There are several industrial types of gold ore deposits in East Ka- zakhstan. They are both proper gold ore and gold bearing de- posits (Table 1). Important sources of gold mining are large Au-Cu-Pb-Zn deposits of the Rudny Altai structural-forma- tion zone where there are high contents of Au, Ag, rare and rare earth elements (Cd, Se, Re, etc.), along with base metals. The deposits are genetically related to the group of Devonian basalt-andesite-rhyolite formations that build up several pro- ductive stratolayers, and the most ore-bearing of them are Emsian, Eifelian, and Givetian. Multi-intermittency of for- mation and multi-deck distribution of ore mineralization are characteristic within ore zones, ore clusters, and felds. Verti- cal length of ore mineralization is up to 1500 m [9]. Ore was https://doi.org/10.29202/nvngu/2019-5/2