IGF



Seismic Basement in Poland, International Jurnal of Earth Sciences (2016)

Abstract

The area of the contact between Precambrian and Phanerozoic Europe in Poland has a complicated structure of sedimentary cover and basement. The thinnest sedimentary cover in the Mazury-Belarus anteclize is only 0.3-1 km thick, increases to 7-8 km along the East European Craton margin (EEC), and 9-12 km in the Trans-European suture zone (TESZ). Variscan domain is characterized by 1-2 km thick sedimentary cover, while the Carpathians are characterized by very thick sediments, up to c. 20 km. The map of basement depth is created by combining data from geological boreholes and set of regional seismic refraction profiles. These maps do not provide data about basement depth in the central part of TESZ and in Carpathians, so the data set is supplemented by 32 models from deep seismic sounding profiles and the map of high resistivity (low conductivity) layer from magnetotelluric soundings, identified as a basement. All these data provide a knowledge of basement depth and P-wave seismic velocities of the crystalline and consolidated type of the basement for the whole area of Poland. Finally, differentiation of basement depth and velocity is discussed with geophysical fields and tectonic division of the area.

Authors

 

Downloadable files

(a) Final basement depth filtered with 30 km radius boxcar filter. ASCII file @ 0.1 by 0.1 degree grid. Area outside Poland filled with NaN: basement_depth_30km_mask.zip

(b) Final P-wave velocity of the uppermost basement filtered with 30 km radius boxcar filter. ASCII file @ 0.1 by 0.1 degree grid. Area outside Poland filled with NaN: basement_velocity_30km_mask.zip


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