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Miocene tectonics of the Maramures area (Northern Romania): implications for the Mid-Hungarian fault zone

Tischler, M. ; Gröger, H. ; Fügenschuh, B. ; Schmid, S.

In: International Journal of Earth Sciences, 2007, vol. 96, no. 3, p. 473-496

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    Title
    • Miocene tectonics of the Maramures area (Northern Romania): implications for the Mid-Hungarian fault zone
    Author
    • Tischler, M.. Geologisch-Paläontologisches Institut, Basel University, Bernoullistr. 32, 4056, Basel, Switzerland
    • Gröger, H.. Geologisch-Paläontologisches Institut, Basel University, Bernoullistr. 32, 4056, Basel, Switzerland
    • Fügenschuh, B.. Institute for Geology and Paleontology, Innsbruck University, Innrain 52f, 6020, Innsbruck, Austria
    • Schmid, S.. Geologisch-Paläontologisches Institut, Basel University, Bernoullistr. 32, 4056, Basel, Switzerland
    Document Type
    • Postprint
    Language
    • English
    Published in
    • International Journal of Earth Sciences, 2007, vol. 96, no. 3, p. 473-496. Springer-Verlag
    Other Version
    OAI-PMH Identifier
    • oai:doc.rero.ch:317814
    Summary
    The interplay between the emplacement of crustal blocks (e.g. "ALCAPA”, "Tisza”, "Dacia”) and subduction retreat is a key issue for understanding the Miocene tectonic history of the Carpathians. Coeval thrusting and basin formation is linked by transfer zones, such as the Mid-Hungarian fault zone, which seperates ALCAPA from Tisza-Dacia. The presented study provides new kinematic data from this transfer zone. Early Burdigalian (20.5 to ∼18.5Ma) SE-directed thrusting of the easternmost tip of ALCAPA (Pienides), over Tisza-Dacia is linked to movements along the Mid-Hungarian fault zone and the Periadriatic line, accommodating the lateral extrusion of ALCAPA. Minor Late Burdigalian (∼18.5 to 16Ma) NE-SW extension is interpreted as related to back-arc extension. Post Burdigalian (post-16Ma) NE-SW shortening and NW-SE extension correlate with "soft collision” of Tisza-Dacia with the European foreland coupled with southward migration of active subduction. During this stage the Bogdan-Voda and Dragos-Voda faults were kinematically linked to the Mid-Hungarian fault zone. Sinistral transpression (16 to 12Ma) at the Bogdan-Voda fault was followed by sinistral transtension (12-10Ma) along the coupled Bogdan-Dragos-Voda fault system. During the transtensional stage left-lateral offset was reduced eastwards by SW trending normal faults, the fault system finally terminating in an extensional horse-tail splay