Аннотация:During the early Earth evolution took place numerous unique geological processes [1]; several of them, especially those taken place in the Hadean-Early Archean and later, are reflected in the modern geological (geophysical, geochemical, etc.) pattern. One of such significant enigmatic features is a preservation of extremely dense and heavy platinum group elements (PGEs): Pt, Pd, Rh, Ru, Ir, Os. Formation of PGEs during that period could be realized in two ways: 1) attendance of special matter to preserve PGEs near the earth’s surface, 2) PGEs transportation by magma flows from the deep lithospheric (asthenospheric)
layers (slabs) to subsurface. Obviously, extremely dense and heavy PGEs did not sink to the Earth’s mantle (core) at the time of magma-ocean formation and occur in near-surface in amounts capable for formation of ore deposits with the PGEs concentrations at 2 - 3 orders of magnitude higher than that in the host media. Their enrichments in numerous cases are
associated with such enigmatic phenomena as anorthosites and anorthositebearing layered magmatic intrusion formation. PGE deposits and mineralization zones are also found in associations with chromitites, dunites and serpentinites. In this review, the problems related to survival and initial concentration of PGEs, their association with anorthosites and formation of layered intrusions are discussed in detail. The main aim of this article is analysis of the requirements—initial concentration and preservation of PGE and PGM (Platinum Group Minerals) during the early Earth evolution as well as examination of some PGEs distribution behavior in different ore deposits and meteorites. It is supposed that meteoritic bombarding of the Earth has played a significant role in the PGEs deposits forming. Some conclusions made in this article may be used for enhancement of searching strategy of the PGEs deposits.