| Abstract: | Tens of gold deposits of different genetic classes (endogenous and exogenous), groups, and types were recognized in cratons, orogenic belts and magmatic arcs of the Transbaikal region and Russian Far East (T and RFE), evaluated to different extents, explored, and prepared (or are being prepared) for exploitation. The formation of the noble-metal mineralization of the region was related to the activity of different genetic types of ore systems, which were responsible for the magmatogenic- and metamorphogenic-hydrothermal, hydrothermal-sedimentary-metamorphogenic, and hydrogenic deposits. The concepts of geologic-genetic and economic types of gold deposits serve as the basis for such fundamental notions of metallogenic analysis as ore formations and geologic-economic types of mineralization. In recent years, the researchers of gold deposits (especially large ones) arrived at conclusions of their polygenous and polychronous formation, which is confirmed sometimes by the sufficiently long-term (up to hundreds of millions of years) conjugate development of ore formations, sedimentation, metamorphism, and magmatism of diverse geodynamic natures. The polygenous nature and significant duration of the formation of the gold deposits affect their economic significance and should be taken into account in the metallogenic forecasting and assessment of the potentially ore-bearing areas. |
