Integrated magnetotelluric and seismic investigation of Cenozoic graben structure near Obrzycko, Poland

Abstract This article presents the results of an integrated interpretation measurements made using Audio-Magnetotellurics and Seismic Reflection geophysical methods. The obtained were used to build model shallow subsurface cover consisting Cenozoic deposits, which then formed basis for a detailed lithological tectonic deeper Mesozoic sediments. Such covers, mainly glacial Pleistocene are typical central northern Poland. investigation concentrated on delineating accurate geometry Obrzycko graben structure filled with loose as it was great importance acquisition, processing seismic data that reveal Cretaceous Jurassic sediments underly study area. Previously, some problems estimation static corrections over similar grabens more recent, low-velocity deposits encountered. Therefore, novel approach estimating exact thickness such applied in presented investigation. shows alternative sets (such magnetotellurics) can be significantly improve imaging geological areas where very distorted or too noisy alone