Electromagnetic images of the deep structure of the Trans-European Suture Zone beneath Polish Pomerania

Details Electromagnetic images of the deep structure of the Trans-European Suture Zone beneath Polish Pomerania Electromagnetic images of the deep structure of the Trans-European Suture Zone beneath Polish Pomerania

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3515307e&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 15, CiteID L15307

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Computation

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Tectonophysics: Continental Tectonics: General (0905), Computational Geophysics: Modeling (4255), Physical Properties Of Rocks: Magnetic And Electrical Properties (0925), Exploration Geophysics: Continental Structures (8109, 8110), Exploration Geophysics: Magnetic And Electrical Methods (5109)

Scientific paper

A large-scale international electromagnetic experiment has been carried out in northwest Poland and northeast Germany. The main goal was to study the deep conductivity structure across the Trans-European Suture Zone, which is the most prominent tectonic structure of Phanerozoic age in Europe. Electromagnetic measurements were carried out mainly along seismic profiles P2, LT-7, and LT-2 crossing the suture zone and running in the northeastern direction. Strike and dimensionality analyses indicate that a geo-electrical strike of N60°W common to both profiles LT-7 and P2 can be estimated. This strike direction was used to project and rotate all transfer functions and both profiles were subjected to 2D inversion using three different approaches. The results show the presence of highly conductive Cenozoic-Mesozoic sedimentary cover reaching depths up to 3 km. A significant conductivity anomaly beneath the central part of the TESZ, called the Central Polish Anticlinorium, has been well resolved at mid-crustal depths. The upper mantle of the Precambrian East European Craton is more resistive than, adjacent to the West, the younger Paleozoic Platform.

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