Abstract
This study’s main objective is to better define and understand results for the most commonly used inversion algorithms in magnetotelluric data interpretation as part of geological exploration of the region of the Dolsk fault and the Odra fault. The data obtained from the eastern part of Fore-Sudetic Monocline measurements were used to describe the boundaries of lithospheric blocks (terranes) and recognize their origin. The magnetotelluric (MT) soundings were carried out to achieve this goal. There were conducted 51 soundings on five quasiparallel profiles. That allows constructing a quasiregular mesh in the area of the Fore-Sudetic Monocline. This arrangement of the measuring grid allowed reducing the influence of the largest sources of disturbances on MT data. 1D and 2D models were created by using the inverse algorithms. The models were prepared for each profile separately. Further, parallel (ModEM) 3D inversion codes were applied. The area where the investigation was done involves the region of the Dolsk fault and the Odra fault. These zones are essential geologic borders of a regional nature, and they pull apart the crust blocks with different origins. It was vitally needed to correctly identify the crust and upper mantle structure around a part of the Fore-Sudetic Monocline. The paper shows how these key features of the geological structures are revealed using 1D, 2D, and 3D algorithms.
Highlights
These studies’ main objective was to investigate the significance of the dimensionality of the inversion algorithm used to understand better the genesis of lithosphere blocks in the East European platforms
The data analyzed in this paper are results of magnetotelluric measurements carried out between 2016 and 2019
The project’s scientific aim is to obtain a detailed image of the Earth’s crust and upper mantle structure around the northwestern part of the Fore-Sudetic Monocline. This area is a part of the Trans-European Suture Zone (TESZ), and it represents a broad and complex zone of terrane accretion at the junction of the Proterozoic lithosphere of the East European Craton (EEC) and the younger Palaeozoic lithosphere of Western and Central Europe [1, 2]
Summary
These studies’ main objective was to investigate the significance of the dimensionality of the inversion algorithm used to understand better the genesis of lithosphere blocks in the East European platforms. The project’s scientific aim is to obtain a detailed image of the Earth’s crust and upper mantle structure around the northwestern part of the Fore-Sudetic Monocline This area is a part of the Trans-European Suture Zone (TESZ), and it represents a broad and complex zone of terrane accretion at the junction of the Proterozoic lithosphere of the East European Craton (EEC) and the younger Palaeozoic lithosphere of Western and Central Europe [1, 2]. The geophysical surveys conducted in this area were mainly based on passive gravity [3], magnetometric methods, and active seismic methods [4] These studies provided new information on the deep tectonic setting of this part of Poland [5]
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