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Avalonian and Cadomian terranes in North Dobrogea,Romania
Authors:Ion Balintoni  Constantin Balica  Antoneta Seghedi  Mihai N Ducea
Institution:1. Department of Geology, Faculty of Biology and Geology, “Babe?-Bolyai” University, M. Kog?lniceanu Str.1, RO-400084 Cluj-Napoca, Romania;2. National Institute of Marine Geology and Geoecology, 23-25 Dimitrie Onciul Str., Bucharest, Romania;3. Department of Geosciences, University of Arizona, Gould-Simpson, Tucson, AZ 85721, USA
Abstract:The North Dobrogea orogen is a collage of dismembered terrane fragments between the Moesian platform and East European craton (Baltica). It records Alpine and Variscan deformation, magmatism and metamorphism. Its basement comprises three metamorphic complexes (Boclugea, Megina and Orliga) that are separated by tectonic boundaries. Detrital zircon U/Pb ages suggest the Boclugea and Orliga complexes represent two peri-Gondwanan terranes of Avalonian and Cadomian affinities, respectively. The new data clarify the original relationships between the North Dobrogea terranes, and Baltica and Moesia platform.
Keywords:North Dobrogea  Detrital zircon ages  Terrane provenance  Boclugea and Orliga complexes
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