Low-frequency 3-D seismic survey of upper crustal magmatic intrusions in the northeastern Pannonian basin of Hungary

Zoltán Hajnal, Endre Hegedus, G. Randy Keller, Tamás Fancsik, Attila Cs Kovács, Róbert Csabafi

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

A specially designed 700-km2 grid survey, deploying 1000 regularly distributed low-frequency seismic recording systems, successfully investigated one of the most complex geologic environments of the Pannonian basin. The wide-angle signals penetrated through over 1000 m of multi-phase igneous lithology and recognized, for the first time, the underlying enigmatic Permian to Early Triassic basement rocks. Tomographic inversion of the first arrival grid data resulted in determination of an accurate three-dimensional (3-D) velocity field, to a depth of 4 km. The anomalous changes of the spatial velocity data outline the regional extent of the Late Miocene magmatic intrusions, which are covered by over 2000 m of Mid-Miocene to Pleistocene clastics. Complex relationship was found between the surface potential data and the intrusive bodies. This multi-faceted geophysical data analysis established a functional technique for mapping a subsurface with intricate acoustic and structural complexity.

Original languageEnglish
Pages (from-to)239-252
Number of pages14
JournalTectonophysics
Volume388
Issue number1-4 SPEC. ISS.
DOIs
Publication statusPublished - Sep 13 2004

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Keywords

  • Low frequency
  • Pannonian basin
  • Seismic-potential data synthesis
  • Three-dimensional
  • Tomographic inversion
  • Wide-angle seismic

ASJC Scopus subject areas

  • Geophysics
  • Earth-Surface Processes

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