THE PALEOARCHEAN (3.3 Ga) AND MESOARCHEAN (3.0 Ga) TTGs OF THE WESTERN AZOV AREA, THE UKRAINIAN SHIELD

A large anticline structure that includes the West Azov and Remivka blocks occurs in western part of Domain Ukrainian Shield. These are composed rocks Mesoarchean (3.2-3.0 Ga) granite-greenstone association relics an older basement. The is divided into two parts by Bilotserkivka sub-latitudinal strike; northern Huliaipole blocks, southern comprised Saltycha anticline. Archean plagiogranitoids underwent intense dislocation metamorphism during Paleoproterozoic. In many areas they were transformed plagioclase gneisses attributed to Paleoarchean “Kainkulak thickness” Series. Detailed geological-structural geochronological studies required define age these gneisses.We have chosen for our studies: Lantsevo within structure, Ivanivka area eastern Central Series highly deformed formations. We dated plagiogneisses contain metamorphic unknown age, including two-pyroxene pyroxene crystalline schists, pyroxenemagnetite quartzites (BIF). terms chemical composition, schists correspond tholeiitic basalts basaltic komatiites. Ferruginous-siliceous belong Algoma type typical greenstone belts. Biotite similar medium-pressure tonalite-trondhjemite-granodiorite (TTGs). U-Pb zircon crystallization from biotite 3299 ± 11 Ma. At 30 km we previously identified quartz diorites having 3297 22 geochemical characteristics, low-pressure TTGs. data show a block representing ancient anticline, strike was reorientated northwestern latitudinal. studied dislocated trondhjemites TTGs characteristics. They numerous altered amphibolites. trondhjemite 3013 15 same as Shevchenko Complex cutting through sedimentary-volcanogenic structures Domain. share characteristics with amphibole-biotite Zrazkove village located at Mokra Konka river (3.1-3.0 lower reaches Kainkulak (2.92 Ga). Thus, fact represent Complex, which Paleoproterozoic time due metamorphism. Late (3.3 tonalites known KMA domains; probably also occur basement Middle Dnieper domains, where detrital zircons this been reported. allow us conclude existence protocraton, belts Shield formed.