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Numerous geological observations indicate that alluvial deposits (gold, tin, diamonds, polymetalles, etc.) have a cluster structure, both in general and in local areas. Up to 80 ? 90 % of the reserves of useful components can be contained in 10 ? 25 % of the volume of traditionally recovered sands. The purpose of the study is to assess the extent and nature of the clustering of reserves in dredged gold deposits. Main methods of researches: analysis and generalization of information of the features on the structure...