Peri-Amazonian,Avalonian-type and Ganderian-type terranes in the South Carpathians,Romania: The Danubian domain basement |
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| Authors: | I Balintoni C Balica MN Ducea C Strem?an |
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| Institution: | 1. Geosciences Montpellier UMR 5243 CNRS, Université de Montpellier, 34095 Montpellier, Cedex 5, France;2. Géosciences Rennes, UMR 6118 CNRS, Université Rennes 1, 35042, Rennes, Cedex, France;3. Geosciences Montpellier UR 5243 CNRS, Université des Antilles, 97159 Pointe à Pitre, French West Indies, France;1. New York State Museum, 222 Madison Avenue, Albany, NY 12230, USA;2. Departamento de Geología Regional, Instituto de Geología, Universidad Nacional Autónoma de México, 04510 México, DF, Mexico;3. Department of Energy, Halifax, Nova Scotia B3J 3JN, Canada;4. Institut für Geographie und Geologie, Lehrstuhl für Geodynamik und Geomaterialforschung, Bayerische Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany;5. Oklahoma Museum of Natural History and School of Geology and Geophysics, University of Oklahoma, Norman, OK 73072, USA;1. Department of Geological Engineering, Recep Tayyip Erdo?an University, TR-53000 Rize, Turkey;2. Department of Geological Engineering, Gumushane University, TR-29000 Gumushane, Turkey |
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| Abstract: | The Danubian domain basement of the South Carpathians, Romania, comprises two Neoproterozoic continental crustal fragments, the Dr?g?an and Lainici-P?iu? terranes, which were sutured by the closure of an intervening oceanic domain, the Ti?ovi?a terrane. Magmatic and detrital zircons extracted from an orthogneiss, four granitoid plutons, two metasedimentary units, and a Liassic sandstone were dated by zircon U/Pb LA-ICP-MS. The F?ge?el augen gneiss from the Dr?g?an terrane basement yielded an age of 803.2 ± 4.4 Ma, the oldest well-constrained crystallization age reported from the Romanian Carpathians basement. The Tismana, ?u?i?a, Novaci and Olte? granitoid plutons, which intrude the Lainici-P?iu? terrane basement, yielded ages of 600.5 ± 4.4, 591.0 ± 3.5, 592.7 ± 4.9, and 588 ± 2.9 Ma, respectively. The Tismana granitoid age of 600 Ma and the youngest detrital zircon ages of 637–622 Ma from a metaquartzite within the Lainici-Paiu? terrane, constrain the deposition of the metaquartzite protolith to ca. 620–600 Ma. The 803 Ma age represents an old Pan-African age, whereas the younger Neoproterozoic ages suggest Pan-African/Cadomian thermotectonic events. Detrital and inherited zircon ages within the Dr?g?an and Lainici-Paiu? terranes attest to a peri-Amazonian, Avalonian-type provenance for the Dr?g?an terrane and possibly a Ganderian-type provenance for the Lainici-P?iu? terrane. The Lainici-P?iu? terrane rifted off Gondwana before the Dr?g?an terrane. Both terranes were attached to Moesia during the Early Paleozoic. |
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