²⁰⁷Pb/²⁰⁶Pb ages and Hf isotope composition of zircons from sedimentary rocks of the Ukrainian shield: Crustal growth of the south-western part of East European craton from Archaean to Neoproterozoic

The results of simultaneous LA-ICP-MS measurements of ²⁰⁷Pb/²⁰⁶Pb and Hf isotope ratios are reported for zircons separated from five Ukrainian shield sedimentary rocks: (1) c. 3.0Ga quartzite of the Bug Series; (2) c. 2.0Ga quartzite of the Topilnya Series; (3) c. 1.75Ga quartzite of the Ovruch Series; (4) c. 1.2-1.0Ga sandstone of the Polissya Series; and (5) c. 0.6Ga conglomerate of the Volyn Series. The age-Hf isotope (eHf_T) data indicate four main crustal growth events at 3.75, 3.20-3.15, 2.2-2.0, and 1.5Ga in the south-western part of the East European craton (EEC). An additional rather minor event could have place at 2.5-2.4Ga. The oldest event is represented by enderbites of the Bug domain in the south-western part of the Ukrainian shield. The second crust-forming event occurred at c. 3.20-3.15Ga and it is documented by detrital zircons separated from the Bug Series quartzite and metasediments of the Soroki greenstone belt, Azov domain. A small number of zircons with positive eHf_T values reveal some input of the juvenile material into the crust at 2.5-2.4Ga, whereas the 2.2-2.0Ga event is dominated by zircons with positive eHf_T values. The youngest event is represented by numerous zircons that crystallized at c. 1.5Ga. The possible sources of these zircons are the rock complexes of the south-western part of the Fennoscandian shield.