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    Apatite fission track and (U-Th)/He thermochronology of Rochovce granite (Slovakia) - implications for thermal evolution of the Western Carpathian-Pannonian region

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    Authors
    Danišík, Martin
    Kohut, M.
    Dunkl, I.
    Hrasko, L.
    Frisch, W.
    Date
    2008
    Type
    Journal Article
    
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    Citation
    Danišík, M. and Kohut, M. and Dunkl, I. and Hrasko, L. and Frisch, W. 2008. Apatite fission track and (U-Th)/He thermochronology of Rochovce granite (Slovakia) - implications for thermal evolution of the Western Carpathian-Pannonian region. Swiss Journal of Geosciences. 101 (S1): pp. 225-233.
    Source Title
    Swiss Journal of Geosciences
    DOI
    10.1007/s00015-008-1279-8
    ISSN
    1661-8726
    School
    Curtin
    URI
    http://hdl.handle.net/20.500.11937/6036
    Collection
    • Curtin Research Publications
    Abstract

    The thermal evolution of the only known Alpine (Cretaceous) granite in the Western Carpathians (Rochovce granite) is studied by low-temperature thermochronological methods. Our apatite fission track and apatite (U-Th)/He ages range from 17.5 ± 1.1 to 12.9 ± 0.9 Ma, and 12.9 ± 1.8 to 11.3 ± 0.8 Ma, respectively. The data thus show that the Rochovce granite records a thermal event in the Middle to early Late Miocene, which was likely related to mantle upwelling, volcanic activity, and increased heat flow. During the thermal maximum between ~17 and 8 Ma, the granite was heated to temperatures ~>60 °C. Increase of cooling rates at ~12 Ma recorded by the apatic fission track and (U-Th)/He data is primarily related to the cessation of the heating event and relaxation of the isotherms associated with the termination of the Neogene volcanic activity. This contradicts the accepted concept, which stipulates that the internal parts of the Western Carpathians were not thermally affected during the Cenozoic period. The Miocene thermal event was not restricted to the investigated part of the Western Carpathians, but had regional character and affected several basement areas in the Western Carpathians, the Pannonian basin and the margin of the Eastern Alps.

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