Magnetotelluric Phase Anisotropy above Extensional Structures of the Neogene Pannonian Basin

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Abstract

Neogene extensional forces generated narrow rift zones (deep subbasins) in the Pannonian Basin, among others one of the deepest, the 7 km deep Békés graben. Above this structure strong magnetotelluric (MT) phase anisotropy (phase-deviation in two orthogonal directions) has been observed indicating the upwelling of the partially molten asthenosphere. This upwelling is certainly the first to prove the validity of the deep mantle structure of Buck's extensional narrow rift model by an electromagnetic method. A geotectonic relation will also be pointed out between the causes of MT phase anisotropy in cratonic and orogenic belts.

Original languageEnglish
Pages (from-to)1549-1557
Number of pages9
JournalJournal of geomagnetism and geoelectricity
Volume49
Issue number42686
DOIs
Publication statusPublished - Jan 1 1997

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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