The sedimentary record of the Tarcău 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 Tarcău and Vrancea sedimentary records are used to propose some constraints in the timing of the deformation for the central Moldavidian Basin and close domains.

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

GUERRERA, FRANCESCO;
2012-01-01

Abstract

The sedimentary record of the Tarcău 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 Tarcău and Vrancea sedimentary records are used to propose some constraints in the timing of the deformation for the central Moldavidian Basin and close domains.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11576/2550575
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