Identification of metasomatic families in geoblocks of Ukrainian Shield

The paper is aimed to refer metasomatites of Ukrainian Shield (USh) to the specific metasomatic families (formations) using the uni-fied system of definitions and terms and to recognize distinctive features of metasomatic rocks for the separate megablocks of the shield. Summarizing the all available data, it can be concluded that restricted list of metasomatic families are identified for the whole ofUSh. In particular, within USh nearsurface families are not known at all; subvolcanic families are presented in Middle-Dnipreanmegablock only; but families merely of hypabyssal and abyssal depth levels are shown in other megablocks. Additionally, it has been found that alkaline metasomatic families are evidently prevailing relatively to acid and magnesian-calcian families as well as almost allmetasomatic rocks of USh are early or middle Proterozoic. As well it has been found that the separate megablocks of USh are character-ized by the specific features of prevalence for different types of metasomatic families. It was concluded that above features of me-tasomatic rocks distinguish the USh from other Precambrian shields of the world. The authors emphasize that conditionality of hydro-thermal-metasomatic processes with general geologic, petrogenetic and tectonic events can give a key knowledge for application ofhydrothermaly altered rocks as important petrology and metallogenic indicators.