Title

S. I. Turchenko

Early Precambrian geology and metallogeny of the Ukrainian Shield – correlation with the Baltic Shield

Unicom feature of the Ukrainian Shield (USh) – its high ferruginous comparatively to Baltic Shield (BSh) and this very clearly shows in metallogeny of Krivoy Rog-Kremenchug province. Beside these, here are concentrate U, Au, graphite deposits and alkaline-ultrabasic-carbonatite intrusions with apatite and rare metal-rare earth mineralization. BSh this type of mineralization is similar to the intrusive complexes is known in the Kola-Norwegian province, but it is associated with a much younger (Devonian) activization. The paper discusses features of the Early Precambrian geology, modern isotope-geochronological data and metallogeny of Archean-Early Proterozoic complexes of both the real boards. A comparative analysis of crustal development and metallogeny of USh and BSh, which makes it clear that the formation of Archean complexes USh began 600 million years earlier than in the BSh, but characterized by the formation of similar granulite-gneiss association and iron ore mineralization. Meso-and neoarchean tectonic development is determined by the formation of greenstone belts with gold and iron ore mineralization at USh and similar but less pronounced mineralization at BSh. Comparison of Ukrainian and Baltic segments of the basement of the East-European platform for the isotope-geochronological data showed their independent formation and presumably originally hosted within different lithospheric plates. At Ush three provinces with the crustal development in the Paleoproterozoic could be compared with the Paleoproterozoic crustal development Svekofennian province BSh, but the differences in metallogeny significant. A distinctive feature of Paleoproterozoic ophiolitic complexes are BSh in which mafic-ultramafic intrusions are Ni-Co-Zn and Fe-Ti mineralization.
Key words: Ukrainian Shield, metallogeny, isotope age, matter complexes, correlation, Baltic Shield.