207 Pb/ 206 Pb 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

• Published in: Precambrian Research
• Main Authors: Shumlyanskyy, Leonid, Hawkesworth, Chris, Dhuime, Bruno, Billström, Kjell, Claesson, Stefan, Storey, Craig
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2015
• Subjects: Archaean; Crustal growth; East European craton; Hf isotopes; Proterozoic; Zircon; Fennoscandian
• Online Access: https://hdl.handle.net/1983/26b87282-30e2-4c92-90d2-cfa170b097c2; https://research-information.bris.ac.uk/en/publications/26b87282-30e2-4c92-90d2-cfa170b097c2; https://doi.org/10.1016/j.precamres.2015.01.007; http://www.scopus.com/inward/record.url?scp=84922386441&partnerID=8YFLogxK

The results of simultaneous LA-ICP-MS measurements of 207 Pb/ 206 Pb 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.