Tereshkova O. Lithological and facies composition and diamond prospects of Raygorodskay strata in the Ingulskiy megablock of the Ukrainian shield

Topical scientific task to substantiate the role of lithological and petrographic, structural and tec-tonic, and paleogeographical factors in the formation of potentially diamond formations of Ray-gorodskaya strata is answered in the dissertation. New prediction-prospecting criteria are formulated and prospective areas for diamond placers are selected. Raygorodskaya strata is represented by volcanic-sedimentary and fluidizate-explosive formations that were formed in continental and coastal-marine envi-ronment from several sources in early Maastricht - Late Paleocene during Laramiyskiy stage of tectonic and magmatic activation of the Ukrainian shield. Probable sources of diamond clastic material in Ray-gorodskie coastal-marine sediments can be considered directly processed low-eroded kimberlitic pipe by wave-cut activity, which localized within shoreline of marine basin. Prospects of diamond-bearing Ray-gorodskaya strata are conditioned by finding of diamonds, minerals-satellites, kimberlitic xenotuff-breccia, by similarity between formation type and pyroclastic kimberlites in area Fort a la Korn (Sas-katchewan, Canada), by fluidizate-explosive formations, which similar to diamond minettes in area Parker Lake, Canada and to rivnenskites in the Ukrainian Shield.