Rotation of the South Slovak Paleogene and Lower Miocene rocks indicated by paleomagnetic data

E. Márton, Dionýz Vass, Igor Túnyi

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

In northern Hungary more than 50 geographically distributed sites in Cenozoic, mainly Miocene extrusive igneous rocks and sediments displayed counter-clockwise rotated declinations. The sites form two groups that differ in the angle of the declination deviation from the present north: the older group is characterized by 50°-60°, the younger by 30°. These paleomagnetic data were interpreted as significant of two rotation events, both taking place in the lower(mid) Miocene. The total rotation significantly exceeds that of the SW part of the Transdanubian Central Range of the Carpatho-Pannonian area. Existing tectonic models do not take into account relative rotation within the Transdanubian Central Range during the Cenozoic, neither can they accommodate a 80°-90° counter-clockwise rotation. In order to follow up the regional occurrence of such rotations, we collected 130 samples from 11 sides (mainly sediments) in the Slovak part of the Buda and/or Hungarian Paleogene Basin (HPB). As a result of stepwise thermal and AF demagnetization we obtained useful magnetic signal from more than half of the collected samples. Nevertheless, the successful sites permit us to extend towards the North the outlines of the area showing excess counter-clockwise rotation with respect to the SW part of the Transdanubian Central Range. Between the Ottnangian and the mid-Badenian the northern area of the HPB moved northward (in the order of 500-1000 km).

Original languageEnglish
Pages (from-to)31-41
Number of pages11
JournalGeologica Carpathica
Volume47
Issue number1
Publication statusPublished - Feb 1996

Fingerprint

Paleogene
Miocene
rock
Badenian
demagnetization
basin
igneous rock
sediment
tectonics

Keywords

  • Buda or Hungarian Paleogene Basin
  • Declination rotation
  • Filakovo/Pétervásara and Novohrad/Nógrád Basins
  • Lower Miocene
  • Paleogene
  • Paleomagnetism

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

Rotation of the South Slovak Paleogene and Lower Miocene rocks indicated by paleomagnetic data. / Márton, E.; Vass, Dionýz; Túnyi, Igor.

In: Geologica Carpathica, Vol. 47, No. 1, 02.1996, p. 31-41.

Research output: Contribution to journalArticle

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