Effective combination of microgravimetry and geoelectrical methods in the detection of subsurface cavities in archaeological prospection – selected case-studies from Slovakia

  • Roman PAŠTEKA Department of Applied and Environmental Geophysics, Faculty of Natural Sciences, Comenius University
  • David KUŠNIRÁK Department of Applied and Environmental Geophysics, Faculty of Natural Sciences, Comenius University
  • Dennis WILKEN Department of Geophysics, Institute for Geosciences, Christian-Albrechts University
  • René PUTIŠKA Department of Applied and Environmental Geophysics, Faculty of Natural Sciences, Comenius University
  • Juraj PAPČO Department of Theoretical Geodesy, Faculty of Civil Engineering, Slovak University of Technology
  • Dominika GODOVÁ Division of Geophysics, Earth Science Institute of the Slovak Academy of Sciences
  • Ivan ZVARA Department of Applied and Environmental Geophysics, Faculty of Natural Sciences, Comenius University
  • Ema NOGOVÁ Department of Applied and Environmental Geophysics, Faculty of Natural Sciences, Comenius University
  • Lenka ONDRÁŠOVÁ Department of Applied and Environmental Geophysics, Faculty of Natural Sciences, Comenius University
Keywords: archaeogeophysics, non-destructive prospecting methods, detection, interpretation

Abstract

This contribution is focused on a common utilization of microgravimetry (very precise and detailed gravimetry) and geoeletrical methods (ground penetrating radar and electric resistivity tomography) in the detection of subsurface cavities in non-destructive archaeological prospection. Both methods can separately detect such kind of subsurface objects, but their complementary and at the same time an eliminating aspect can be very helpful in the interpretation of archaeogeophysical datasets. These properties were shown in various published case-studies. Here we present some more typical examples. Beside this, we present here for a first time an application of the electric resistivity tomography in the interior of a building (a church) in Slovakia. We also demonstrate an example with an extremely small acquisition step in microgravity as a trial for the detection of cavities with very small dimensions – in this case small separated spaces for coffins as a part of the detected crypt (so called columbarium). Unfortunately, these cavities were too small to be reliably detected by the microgravity method. We have tried the well-known 3D Euler deconvolution method to obtain usable depth estimates from the acquired anomalous gravity field. Results from this method were in the majority of cases plausible (sometimes little bit too shallow), when compared with the results from the ground penetrating radar. In one selected example, the 3D Euler solutions were too deep and in the present stage of study we cannot well explain this situation. In general, all presented results support an important role of common combination of several geophysical methods, when searching for subsurface cavities in non-destructive archaeological prospection.

Author Biographies

Roman PAŠTEKA, Department of Applied and Environmental Geophysics, Faculty of Natural Sciences, Comenius University

Mlynská dolina, Ilkovičova 6, 842 48 Bratislava, Slovak Republic

David KUŠNIRÁK, Department of Applied and Environmental Geophysics, Faculty of Natural Sciences, Comenius University

Mlynská dolina, Ilkovičova 6, 842 48 Bratislava, Slovak Republic

Dennis WILKEN, Department of Geophysics, Institute for Geosciences, Christian-Albrechts University

Otto-Hahn-Platz 1, 24118 Kiel, Germany

René PUTIŠKA, Department of Applied and Environmental Geophysics, Faculty of Natural Sciences, Comenius University

Mlynská dolina, Ilkovičova 6, 842 48 Bratislava, Slovak Republic

Juraj PAPČO, Department of Theoretical Geodesy, Faculty of Civil Engineering, Slovak University of Technology

Radlinského 11, 810 05 Bratislava, Slovak Republic

Dominika GODOVÁ, Division of Geophysics, Earth Science Institute of the Slovak Academy of Sciences

Dúbravská cesta 9, P. O. Box 106, 840 05 Bratislava, Slovak Republic

Ivan ZVARA, Department of Applied and Environmental Geophysics, Faculty of Natural Sciences, Comenius University

Mlynská dolina, Ilkovičova 6, 842 48 Bratislava, Slovak Republic

Ema NOGOVÁ, Department of Applied and Environmental Geophysics, Faculty of Natural Sciences, Comenius University

Mlynská dolina, Ilkovičova 6, 842 48 Bratislava, Slovak Republic

Lenka ONDRÁŠOVÁ, Department of Applied and Environmental Geophysics, Faculty of Natural Sciences, Comenius University

Mlynská dolina, Ilkovičova 6, 842 48 Bratislava, Slovak Republic

Published
2019-12-30
How to Cite
PAŠTEKA, R., KUŠNIRÁK, D., WILKEN, D., PUTIŠKA, R., PAPČO, J., GODOVÁ, D., ZVARA, I., NOGOVÁ, E., & ONDRÁŠOVÁ, L. (2019). Effective combination of microgravimetry and geoelectrical methods in the detection of subsurface cavities in archaeological prospection – selected case-studies from Slovakia. Contributions to Geophysics and Geodesy, 49(4), 479-496. https://doi.org/10.2478/congeo-2019-0025
Section
original research papers