Application of Electrical Resistivity Tomography to the detection of the Ermakia (Northern Greece) cavity system

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Published: Jan 1, 2007
DOI: https://doi.org/10.12681/bgsg.17298
Keywords:
Electric tomography seismic refraction tomography cave mapping
G. Vargemezis
Aristotle University of Thessaloniki, School of Geology, Department of Geophysics
P. Tsourlos
Aristotle University of Thessaloniki, School of Geology, Department of Geophysics
C. Papazachos
Aristotle University of Thessaloniki, School of Geology, Department of Geophysics
D. Kostopoulos
Aristotle University of Thessaloniki, School of Geology, Department of Geology
Abstract

Electrical resistivity tomography has been applied for the exploration of a karstic cave system at the region of Ermakia, next to the city of Ptolemais (NWt Greece). Geological investigations indicated that the main known Ermakia cave chamber "communicates " with at least one underground karstic ovoid. This evidence lead us to prospect the surrounding area by applying 2-D Electrical tomography survey on a regular grid in both x,y directions. Survey lines crossed the known cave in order to verify k the suitability of the method at the specific area and calibrate the resistivity values. Resistivity data were inverted and results were compiled in qusi3-D resistivity images. The interpreted results indicated the existence of two more chambers next to the known one which is in agreement with in-situ observations.

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  • New Technologies in Geophysical and Geological Research
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