International Geological Journal - Official Journal of the Carpathian-Balkan Geological Association

Tectonic control on the sedimentary record of the central Moldavidian Basin (Eastern Carpathians, Romania)

Pages: 463 - 479

Authors: FRANCESCO GUERRERA, MANUEL MARTIN MARTIN, JOSE A. MARTIN-PEREZ, IVAN MARTIN-ROJAS, CRINA MICLAUS, FRANCISCO SERRANO

Abstract: The sedimentary record of the Tarcau and Vrancea Nappes, belonging to the flysch accretionary zone of the Eastern Carpathians (Eastern Carpathian Outer Flysch), registered Cretaceous-Miocene events during the evolution of the Moldavidian Basin. Our biostratigraphic data indicate that the deposits studied are younger than previously reported. The comparison of sedimentary record studied with the Late Cretaceous–Early Miocene global eustatic curve indicates that eustatic factor played a secondary role, after the tectonic one. Four main stages of different processes influenced by tectonics are recognized in the sedimentary record: (1) Campanian–Maastrichtian–earliest Paleocene; (2) latest Ypresian–Lutetian; (3) late Chattian–earliest Aquitanian, and (4) late Aquitanian-early Burdigalian. The late Chattian–earliest Aquitanian and late Aquitanian-early Burdigalian records indicate a high tectonic influence. The first event was related to the foredeep stage of the sedimentary domain studied, and the second one to the deformation stage of the same domain. The sedimentary records of tectonic influence recognized during these stages are useful tools for geodynamic reconstructions. The stratigraphic correlation of Tarcau and Vrancea sedimentary records are used to propose some constraints in the timing of the deformation for the central Moldavidian Basin and close domains.

Keywords: Cretaceous-Miocene stratigraphy, central Moldavidian Basin, Tarcau and Vrancea Nappes (Romanian Eastern Carpathians), paleogeography, geodynamic constraints, tectono-sedimentary processes, calcareous nannoplankton, planktonic foraminifera

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