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Open Geosciences

formerly Central European Journal of Geosciences

Editor-in-Chief: Jankowski, Piotr

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2391-5447
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Detection of the near surface structure through a multidisciplinary geophysical approach

Eleni Kokinou
  • Laboratory of Geophysics and Seismology, Department of Natural Resources and Environment, Technological Educational Institute Crete, Crete, Greece
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/ Apostolos Sarris
  • Laboratory of Geophysical-Satellite Remote Sensing & Archaeo-enviroment, Institute for Mediterranean Studies, Foundation for Research & Technology - Hellas, Crete, Greece
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Published Online: 2011-12-14 | DOI: https://doi.org/10.2478/s13533-011-0034-2

Abstract

The present survey aimed to image the subsurface structure, including karstic voids, and to evaluate the extent of the heterogeneities that can result in potentially dangerous collapse of road segments overlying these features. A multidisciplinary geophysical approach (seismic refraction, frequency domain electromagnetic and ground penetrating radar) in combination with a detailed geological survey indicated the presence of tectonic faults as well as velocity and conductivity anomalies along an old road within the area of Akrotiri at Chania (Crete). Due to the presence of subsurface fuel pipes, perpendicular to the direction of the road, 2D resistivity imaging was excluded from the applied geophysical methods.

Interpretation of the geophysical data revealed that the section of the road investigated overlies prominent voids attributed mostly to karst features. The conductivity and velocity anomalies are interpreted to indicate an area where the host limestone rock has been downthrown by faulting and associated karstification. The continuation of this fault zone was observed in the slope of the road during later excavations. Interpretation, using geographic information systems (GIS) to integrate data, allowed these controls and relationships to be understood and monitored. The above methodology was proved successful for areas where the application of resistivity method is not possible.

Keywords: Tectonic fault; karstic void; shallow geophysics

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About the article

Published Online: 2011-12-14

Published in Print: 2011-12-01


Citation Information: Open Geosciences, ISSN (Online) 2391-5447, DOI: https://doi.org/10.2478/s13533-011-0034-2.

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© 2011 Versita Warsaw. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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