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    Apatite fission track and (U-Th)/He dating of teschenite intrusions gives time constraints on accretionary processes and development of planation surfaces in the Outer Western Carpathians.

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    Authors
    Danišík, Martin
    Panek, T.
    Matysek, D.
    Dunkl, I.
    Frisch, W.
    Date
    2008
    Type
    Journal Article
    
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    Citation
    Danišík, M. and Panek, T. and Matysek, D. and Dunkl, I. and Frisch, W. 2008. Apatite fission track and (U-Th)/He dating of teschenite intrusions gives time constraints on accretionary processes and development of planation surfaces in the Outer Western Carpathians. Zeitschrift für Geomorphologie. 52 (3): pp. 273-289.
    Source Title
    Zeitschrift für Geomorphologie
    DOI
    10.1127/0372-8854/2008/0052-0273
    ISSN
    0372-8854
    School
    Curtin
    URI
    http://hdl.handle.net/20.500.11937/31136
    Collection
    • Curtin Research Publications
    Abstract

    The age of planation surfaces in the Podbeskydská pahorkatina Upland in the Outer Western Carpathians (OWC, Czech Republic) is constrained by low-temperature thermochronological dating methods for the first time. Our apatite fission track and apatite (U-Th)/He data measured on teschenite intrusions show that planation surfaces in the study area formed in post-Pannonian time (>7.1 Ma) and are therefore younger than traditionally believed. This contradicts the classical concepts, which stipulate that a large regional planation surface of Pannonian age (the so-called “midmountain level”) developed in the whole Western Carpathians. Geodynamic implications of our data are the following: (i) the investigated Těšín and Godula nappes of the OWC were buried and thermally overprinted in the accretionary wedge in different ways, and consequently experienced different cooling histories. This indicates a dynamic basin setting with an active accretionary process in a subduction zone; (ii) accretionary processes in the OWC were active already during Late Eocene times.

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