The resistivity image of the Upper Cretaceous Horné Belice Group: a case study from the Hranty section (Považský Inovec Mts., Western Carpathians)

AbstractThe Tatricum crystalline basement in the northern Považský Inovec Mts. contains several narrow tectonic slices with different rock composition. Some of them composed of the Upper Cretaceous mass flow deposits (the Horné Belice Group) are considered unique within the framework of the Internal Western Carpathians and particularly within the Tatricum. Tectonic interpretation of their structural position is longer a matter of debate. Contrasting resistivity properties of the Hercynian mica schists and the Upper Cretaceous sandstones and shales were confirmed by the parametric geophysical measurements. The Hranty section, the structurally highest and most internal Upper Cretaceous tectonic slice was investigated by the electric resistivity tomography. Two longitudinal and two transverse resistivity profiles were measured and combined into a 3D image which suggests that the low resistivity Upper Cretaceous rocks form relatively shallow and flat lying structures folded and deformed between the crystalline basement slices.

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Groundwater exploration in crystalline basement complex using seismic refraction and electrical resistivity tomography: case study of Olomore, Abeokuta, southwestern Nigeria

10.1002/essoar.10500139.1 ◽

2018 ◽

Author(s):

Ahzegbobor P. Aizebeokhai ◽

Adenifesimi A. Oni ◽

Kehinde D Oyeyemi

Keyword(s):

Electrical Resistivity ◽

Electrical Resistivity Tomography ◽

Seismic Refraction ◽

Groundwater Exploration ◽

Crystalline Basement ◽

Basement Complex ◽

Southwestern Nigeria ◽

Resistivity Tomography

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Nucleation and amplification of doubly-plunging anticlines: the Butkov pericline case study (Manín Unit, Western Carpathians)

Geologica Carpathica ◽

10.1515/geoca-2018-0022 ◽

2018 ◽

Vol 69 (4) ◽

pp. 365-381 ◽

Cited By ~ 1

Author(s):

Dušan Plašienka ◽

Viera Šimonová ◽

Jana Bučová

Keyword(s):

Lower Cretaceous ◽

Upper Cretaceous ◽

Western Carpathians ◽

Rigid Layer ◽

Tectonic Element ◽

Pieniny Klippen Belt ◽

Sedimentary Succession ◽

Central Western Carpathians ◽

Layer Development

Abstract The Manín Unit represents a transitional tectonic element between the Central Western Carpathians and the Pieniny Klippen Belt. The overall map-view structure of the Manín Unit is dominated by elliptical antiforms composed of comparatively competent Jurassic and Lower Cretaceous strata, surrounded by soft Upper Cretaceous shales, marls and sandstones. During layer-parallel shortening, the Manín sedimentary succession behaved as a multilayer reinforced by a variously thick rigid layer of massive Urgonian limestone. The multilayer deformed by flexural slip folding, but the fold wavelength was controlled by the rigid layer undergoing buckling. It is inferred that, besides the lateral thickness differences in the rigid layer, development of brachyfolds and particularly periclines such as the Butkov fold also resulted from the interference of two perpendicular macroscopic fold systems.

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The resistivity image of the Muráň fault zone (Central Western Carpathians) obtained by electrical resistivity tomography

Geologica Carpathica ◽

10.2478/v10096-012-0017-3 ◽

2012 ◽

Vol 63 (3) ◽

pp. 233-239 ◽

Cited By ~ 2

Author(s):

René Putiška ◽

Ivan Dostál ◽

Andrej Mojzeš ◽

Vojtech Gajdoš ◽

Kamil Rozimant ◽

...

Keyword(s):

Electrical Resistivity ◽

Fault Zone ◽

Electrical Resistivity Tomography ◽

Geophysical Methods ◽

Western Carpathians ◽

Small Scale ◽

Second Phase ◽

Resistivity Tomography ◽

Central Western Carpathians ◽

Resistivity Image

The resistivity image of the Muráň fault zone (Central Western Carpathians) obtained by electrical resistivity tomographyThe paper describes the application of geophysical prospecting techniques for estimation of the fault's inclination. The field survey was carried out across the Muráň fault structure in the Slovenské rudohorie Mts (central Slovakia). Three different geophysical methods were used to map the fault zone: Electrical Resistivity Tomography (ERT), induced polarization (IP) and radon emanometry. All these methods have been used to locate the fault zone area, but the principal aims of this research are to test the efficiency of the 2D ERT technique to recognize the geometrical characterization of the fault and to improve our tectonic knowledge of the investigated area. For the synthetic cases, three geometric contexts were modelled at 60, 90 and 120 degrees and computed with the l2norm inversion method, the l1norm with standard horizontal and vertical roughness filter and the l1norm with diagonal roughness filter. In the second phase this geophysical methodology was applied to fieldwork data. Our results confirm that the ERT technique is a valuable tool to image the fault zone and to characterize the general geometry, but also the importance of setting up the right inversion parameters. The main contribution of the geophysical investigations in this case was the determination of the location and confirmation of the inclination of the Muráň fault. The result of this study is the ability to make a visual estimation of the direction and dip of the fault. Pursuant to this work the dipole-dipole electrode configuration produces the best resolution, particularly for the location of vertical and dipping structures. The advantage of this array is that it shows the ability to assess the trend of the dip and therefore it can be strongly recommended. The result is also a case study of a small scale tectonic survey involving geophysical methods.

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