View More View Less
  • 1 Eötvös Loránd Geophysical Institute of Hungary, H-1145, Budapest, Columbus u. 17-23, Hungary
  • | 2 Department of Geology, University of Miskolc, H-3515, Miskolc, Egyetemváros, Hungary, zelenka.tibor@freemail.hu
  • | 3 Geophysics Department, Eötvös Loránd University, H-1117, Budapest, Pázmány P. sétány 1/c, Hungary, martonp@ludens.elte.hu
Restricted access

Abstract

Paleomagnetic measurements were carried out on 163 independently oriented samples from 19 sites of the Bükk Mts and their northern, western and southern forelands. The aim was to correlate the sites with one of three Miocene rhyolite tuff horizons using the combination of paleomagnetic marker horizons (rotational events) and traditional magnetostratigraphy.

In contrast to the results of earlier studies in the southern Bükk foreland, which yielded only reversed polarity magnetizations, nearly half of the presently obtained paleomagnetic directions are of normal polarity. By their declinations they mostly belong to the middle tuff horizon, and only one belongs to the upper.

The paleomagnetic age assignment of the studied sites sometimes supports one or both of the classifications of Balogh (1964) and Pelikán et al. (2005). However, about one-third of the sites classified by these authors as upper or lower tuffs were shown to belong to the middle tuff complex.

  • K. Balogh 1964 Geological formations of Bükk Mts MÁFI Évkönyv 48 243 719.

  • S.C. Cande D.V. Kent 1995 Revised calibration of the geomagnetic polarity timescale for the Late Cretaceous and Cenozoic Journal of Geophysical Research 100 B4 6093 6095.

    • Search Google Scholar
    • Export Citation
  • R. Fisher 1953 Dispersion on a sphere Proc. Roy. Soc. London Ser. A 217 295 305.

  • Sz. Harangi P.R.D. Mason R. Lukács 2005 Correlation and petrogenesis of silicic pyroclastic rocks in the Northern Pannonian Basin, Eastern-Central Europe: In situ trace element data of glass shards and mineral chemical constraints Journal of Volcanology and Geothermal Research 143 237 257.

    • Search Google Scholar
    • Export Citation
  • J.L. Kirschvink 1980 The least-squares line and plane and the analysis of paleomagnetic data Geophys. J. Roy. Astron. Soc. 62 699 718.

  • Z. Gulácsi S. Kovács P. Pelikán L. Pentelényi A. Rezessy L. Sásdi 2002 Gy. Less Geological Map of the Bükk Mountains 1: 50 000 MÁFI Budapest.

    • Search Google Scholar
    • Export Citation
  • M. Elecko S. Kovács P. Pelikán L. Pentelényi Zs. Peregi J. Pristaš Gy. Radócz I. Szentpétery D. Vass J. Vozár A. Vozárová 2004 Gy. Less J. Mello Geological Map of the Gemer-Bükk area 1: 100 000 MÁFI Budapest.

    • Search Google Scholar
    • Export Citation
  • R. Lukács Gy. Czuppon Sz. Harangi Cs. Szabó T. Ntaflos F. Koller 2002 Silicate melt inclusions in ignimbrites, Bükkalja Volcanic Field, Northern Hungary — texture and geochemistry Acta Geologica Hungarica 45 341 358.

    • Search Google Scholar
    • Export Citation
  • Márton, E., P. Márton 1996: Large scale rotations in North Hungary during the Neogene as indicated by paleomagnetic data. — In: Morris, A., D.H. Tarling (eds): Paleomagnetism and Tectonics of the Mediterranean Region. Geol. Soc. Spec. Publ., 105, pp. 153173.

    • Search Google Scholar
    • Export Citation
  • E. Márton Z. Pécskay 1998 Correlation and dating of the Miocene ignimbritic volcanics in the Bükk foreland, Hungary: Complex evaluation of paleomagnetic and K/Ar isotope data Acta Geologica Hungarica 41 467 476.

    • Search Google Scholar
    • Export Citation
  • Márton, E., D. Vass, I. Túnyi, P. Márton (in prep): Paleomagnetic age assignment of the ignimbites from the famous fossil footprints site, Ipolytarnóc (Hungary).

    • Search Google Scholar
    • Export Citation
  • G. Pantó 1962 The role of ignimbrites in the volcanism of Hungary Acta Geol. Acad. Sci. Hung. 6 301 331.

  • L. Pelikán Gy. Less S. Kovács P. Pentelényi L. Sásdi 2005 P. Pelikán Geology of the Bükk Mountains MÁFI Budapest.

  • T. Póka T. Zelenka A. Szakács I. Seghedi G. Nagy A. Simonits 1998 Petrology and geochemistry of the Miocene acidic explosive volcanism of the Bükk Foreland; Pannonian Basin, Hungary Acta Geologica Hungarica 41 437 466.

    • Search Google Scholar
    • Export Citation
  • Schréter, Z. 1913: Geology of Eger and surrounding. — MÁFI Évi Jelentés, 1912, pp. 130146. (In Hungarian.).

  • A. Szakács I. Seghedi T. Zelenka E. Márton Z. Pécskay T. Póka 1998 Miocene acidic explosive volcanism in the Bükk Foreland, Hungary: Identifying eruptive sequences and searching for search location Acta Geologica Hungarica 41 413 435.

    • Search Google Scholar
    • Export Citation
  • Zelenka, T., T. Póka, E. Márton, Z. Pécskay 2005: New data on stratigraphic position of the Tar Dacite Tuff Formation. — MÁFI Évi Jelentés, 2004, pp. 7384. (In Hungarian.).

    • Search Google Scholar
    • Export Citation
All Time Past Year Past 30 Days
Abstract Views 9 9 1
Full Text Views 4 3 0
PDF Downloads 1 1 0