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This thesis is referred to the contribution of geophysical techniques in order to solve a difficult archaeological problem. The project was a collaboration between Laboratory of Geophysics from University of Patras and Department of Archaeology from University of Athens. Prof Karali requested from our Laboratory to investigate a cave which is located on Ymitos Hill at Athens, for the detection of possible buried archaeological remains. According to Ancient writers, this cave was used from ancient people as main home and the archaeologist believed that perhaps there were evidence from human activity. Our Laboratory accepted the request to participate in this research and begun to plan the schedule of the geophysical investigation, while there was the experience of such kinds of investigations from previous surveys. A systematic geophysical research applied inside the cave, by using two different geophysical techniques. Firstly a detailed geomagnetic survey took place, by recording the distribution of total geomagnetic intensity in nTesla. By using two proton magnetometers type Elsec 820, a detailed geophysical research applied, by measuring stations with interval equal to one meter. The geomagnetic survey applied not only on unique profile but also and on well predefined geophysical grid. As second technique applied the vertical geoelectric imaging by adopting Wenner, Dipole-Dipole & Wenner-Schlumberger electrode arrangement. The space of electrodes was varying between 0.5-1.4 m distance in order deeper possible structures to be recorded. As main objective of that technique was the distribution of resistivity according to the depth. After the research in field, the geophysical data were processed through special geophysical software, where as result was the creation of coloured scale maps with the distribution of measured geophysical property. |
