The article considers from the theoretical point of new global tectonics the geological conditions of formation, peculiar features of material composition, and criteria for predicting deposits of nickeliferous weathering crusts of east Kazakhstan. According to geotectonic zoning, this territory includes geological structures of the Big Altai (BA), which is part of the central Asian mobile belt. The ore-controlling role is assigned to the area of global interaction of the Kazakhstan and Siberian paleocontinents during the stage of the Hercynian collision (Ñ1-Ñ3) followed by the formation of the Zaisan suture zone, the structure of which is represented by the Charsky-Gornostaevsky ophiolite belt (suture stitch). During the Hercynian cycle of tectogenesis, main gold fields of the regions appeared in the Zaisan suture (gold-quartz, gold-sulphide, gold-listvenite, etc.) in a collision situation, controlled by a system of deep faults of the crust and mantle type. In similar tectonic environment, large stockwork gold deposits were formed in Rudny Altai, north Kazakhstan, and other regions. During the Cimmerian cycle, the residual weathering crust deposits of Au, Ti-Zr, Ni-Co were formed in the region of continental rifting. The article emphasizes the spatial association of silicate cobalt-nickel deposits to the outputs of serpentinized ultrabasites of the Charsky-Gornostaevsky belt and provides a characteristic of the geological structure and material composition of nickel content in ores of the Belogorskoye and Gornostaevskoye standard deposits. Expansion of prospects depends on the possibility of growth of reserves of cobalt and nickel ores on the flanks and deep horizons of the known ore fields and search for buried deposits in prospective areas determined by geological and geophysical studies.

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The MAin GeoloGiCAl-inDuSTriAl TyPeS of GolD DePoSiTS in eAST KAzAKhSTAn Purpose. To characterize leading geologicalindustrial types of gold deposits within Kazakhstani part of the Great Altai. Methodology. Field studies are within proper gold ore and orebearing deposits. Sampling is carried out for defining 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 different geodynamic conditions. The most productive ones are O 3 , D 12 , C and K 2 age boundaries. Island arc, ensimatic, ensialic, volcanogenicsedimentary and collision environments are of great interest for gold mineralization. The most important sources of gold mineralization within the Great Altai are goldbase metals, goldquartz, goldsulphidequartz 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 goldbase metals (polymetallic and copperleadzinc) 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 lowcost technologies for qualitative evaluation of gold ore deposits that were formed in different geodynamic conditions and time intervals on the basis of mineralogical sampling method, topomineralogy method, which enables one to solve the task of replenishing mineralraw 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 1990s 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 geologicalestimating and to operational exploration. Nowadays, uptodate technologies of concentration, and develop ment methods enable to refer these deposits to the objects of primary commercial exploitation. Their studying has scientific value in the issues of endogenetic mineralization and creates prerequisites of discovering new perspective areas and deposits in Kazakhstan.

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The Great Altai region, located at the boundary of Russia, Mongolia, China, and Kazakhstan, belongs to the system of the Central Asian Orogenic Belt. It has undergone a long complex geological and metallogenic history. Extremely rich resources of base, precious, and rare metals (Fe, Cu, Pb, Zn, Ag, Au, Li, Cs, Ta, Nb, REE, etc.) maintain developed mining and metallurgical industry, especially in East Kazakhstan, which is the key metallogenic province. The East Kazakhstan province comprises the Rudny Altai, Kalba-Narym, West-Kalba, and Zharma-Saur metallogenic belts, each having its typical mineralization profiles and deposits. The reconstructed geodynamic and metallogenic history of the Great Altai province, along with the revealed relationships between tectonic settings and mineralization patterns, allowed us to formulate a number of geodynamic, structural, lithostratigraphic, magmatic, mineralogical, and geochemical criteria for exploration and appraisal of mineral potential in Eastern Kazakhstan. Geodynamic criteria are based on the origin of different mineralization types in certain geodynamic settings during the Late Paleozoic–Early Mesozoic orogenic cycle. Structural criteria mean that the location of base-metal deposits in Rudny Altai, gold deposits in the West Kalba belt, rare and base metals in the Kalba-Narym and Zharma-Saur zones is controlled by faults of different sizes. Lithostratigraphic criteria consist of the relation of orebodies with certain types of sedimentary or volcanic-sedimentary rocks. Magmatic criteria are due to the relation between mineralization types and igneous lithologies. Mineralogical and geochemical criteria include typical minerals and elements that can serve as tracers of mineralization. The joint use of all these criteria will open new avenues in prospecting and exploration at a more advanced level.