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A large number of placer deposits in the Trans-Baikal Territory and other regions of the Far East and Siberia feature large amounts of clay (30% and more). In such conditions, their development and preparation are complicated. The dredger performance reduced by 10-15%, and metal loss during preparation, especially small and fine-grained gold, amount to 30-50% and sometimes even more. Therefore, we face a problem of weakening the cleat between mineral grains and clay particles acting as an adhesive. Besides, we need to develop efficient technology for clay and cemented placer deposits for dredging. We developed and introduced into production a clay sand weakening technology. It was used on a dredging site in the Zabaykalye territory and resulted in a significant improvement of the dredger performance and gold output.

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The coal deposits containing a complex of the major valuable microelements which have various degree of study are disclosed in Transbaikal territory. The analysis of geological material on coal deposits of Transbaikal region demonstrates great prospect for search and surveying of germanium-bearing coals in this territory. Gallium and beryllium at infrequent elements’ group is expedient to consider which are contained in local coals in the increased concentration connected among themselves. Content of these elements in coals it is caused by space exposure of coal and rare-metal deposits. The last include the production reserves of beryllium and they are a part of the Transbaikal region beryllium-bearing province in Russia. It is noted that some coal deposits of Transbaikal region have the increased content of rare-earth elements. Noble metals in the increased concentration are established in many assay of coal of various deposits that is caused by constant aurum content within the Transbaikal metallogenic province. There are data on content of valuable ore elements in coal deposits of the Transbaikal region, regularities of their placement depending on geochemical features of metallogenic provinces, conditions of accumulation and to form into various components of coals and also information about ore elements’ localization and their associations. The analysis of these data gives geological and technological characteristic to metal-bearing coals as to perspective complex of mineral raw materials. There are considered infrequent and diffuse elements, non-ferrous, noble, rare-earth and radioactive metals with concentration less than 0,1% as microelements in coals. According to the International Organization for Standardization 84 elements are detected in coals which belong to various groups of a periodic system of elements. 35-40 elements are found stably in coals of deposits of Russia in detection limits of mass analyses.