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Electrical resistivity tomography (ERT) and sedimentological analysis applied to investigation of Upper Jurassic limestones from the Krzeszowice Graben (Kraków Upland, southern Poland)

Woźniak T., Bania G., Mościcki W. J., Ćwiklik M.

Geological Quarterly

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2018

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Vol. 62, No. 2

287--302

EN

This paper highlights the application of shallow non-invasive geophysics (electrical resistivity tomography) supported by sedimentological analysis applied to the investigation, description and interpretation of Upper Jurassic limestones exposed in the abandoned quarry near the village of Tomaszowice (Kraków Upland, southern Poland). Within this site, on the northern margin of the Krzeszowice Graben, a facies diversity of Upper Jurassic limestones can be observed. Field exposures were analysed to broadly characterize these Upper Jurassic limestones in terms of facies and microfacies development. Three facies types, including pelitic limestones, bedded limestones and carbonate gravity-flow deposits, composed of numerous microfacies, have been distinguished. ERT study using a dipole-dipole array has been carried out, along 5 parallel 110 m long profiles and along a perpendicular 110 m long profile, north of the Tomaszowice Quarry wall. The use of ERT in combination with the geological data allowed characterization and description of the geology at the research site as well as the determination of the lithological composition and internal architecture of the subsurface. Furthermore, the ERT interpretation results indicated the presence of a series of a secondary faults closely linked with the Krzeszowice Graben. The distribution of the gravity-flow deposits reflects the fault zone pattern of the graben and Late Jurassic fault activity.

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Wpływ lokalnej, przypowierzchniowej budowy geologicznej na deformacje powierzchni terenu w warunkach podziemnej eksploatacji górniczej

Niedojadło Z., Piwowarski W., Mościcki W., Sopata P., Stoch T., Bania G., Ćwiklik M.

Przegląd Górniczy

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2016

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T. 72, nr 1

18--26

PL

W publikacji przedstawiono przypadek znaczącej deformacji terenu wywołanej podziemną eksploatacją górniczą, który nie znajduje wytłumaczenia w standardowym modelu zachowania się górotworu. Przyczynę powstania tak silnie destrukcyjnych deformacji należy upatrywać w występującej lokalnie specyficznej budowie geologicznej. Deformacje stwierdzone zostały pomiarami geodezyjnymi prowadzonymi na fragmencie sieci obserwacyjnej zlokalizowanej nad polem górniczym. Powiązanie powstałych na powierzchni terenu deformacji z budową geologiczną możliwe było dopiero po przeprowadzeniu szczegółowych badań geofizycznych. Wyniki zarówno pomiarów geodezyjnych, jak i geofizycznych zostały zaprezentowane i opisane w artykule.

EN

This publication presents the case of land deformations with a strong, destructive impact which cannot be explained based on standard, model behaviour of the rock mass, and the land surface under the conditions of the impact of the underground mining exploitation. The reason for this type of deformation in the case described should be sought in a special geological structure which occurs locally. The deformations were found with the use of geodetic surveys, conducted in the section of the observation network located over the mining field. It was possible to connect the deformations on the land surface with the geological structure only after the detailed geophysical research had been conducted. The results of both the geodetic and geophysical measurements are presented and described in this publication.

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DC resistivity studies of shallow geology in the vicinity of Vistula River flood bank in Czernichów village (near Kraków in Poland)

Mościcki W. J., Bania G., Ćwiklik M., Borecka A.

Studia Geotechnica et Mechanica

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2014

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Vol. 36, nr 1

63--70

EN

DC resistivity methods, soundings and Electrical Resistivity Tomography, were applied to study shallow geology in the place of planned construction of an experimental flood bank. The geoelectrical surveys provided quantitative information about the spatial presence of the various geoelectrical/geological layers: alluvial soils, sands, gravels and clays. ERT allowed maps to be constructed showing subsurface structure. A combination of geoelectrical and geological information resulted in a much better identification of the geological structure.

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2D Electrical Resistivity Tomography interpretation ambiguity - example of field studies supported with analogue and numerical modelling

Bania G., Ćwiklik M.

Geology, Geophysics and Environment

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2013

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Vol. 39, no. 4

331--339

EN

Single Electrical Resistivity Tomography (ERT) survey was carried out in the Manor and Park Complex in Nowa Huta (Krakow Branice, Poland). It was applied at a small distance and parallel to the longer wall of a monumental building containing an empty 3 m deep basement. Analogue modelling was performed in order to recreate the field study at the proper scale. The laboratory set-up consisted of a water tank where electrodes were mounted to the particular plate, which rested on water surface. The basement model was made out of a non-conducting material. The default and robust inversions were tested and these variants were also considered with the use of numerical modelling. Laboratory experiments have confirmed that zones visible in the interpreted field section are caused by the influence of the building cellar located next to the survey line. Zones of this kind are additionally disturbed by the local geological structure. The experiment has pointed out, among others, that as the distance between the survey line and the underground body increases, the inversion results are still burdened by an object influence. Thus, similar situations can be verified with the use of analogue modelling presented in this paper or 3D numerical one.