Advances in Geosciences www.adv-geosci.net 1680-7340 1680-7359 24 Near surface geophysics for the study and the management of historical resources: past, present and future (EGU Session 2009) 2010 10.5194/adgeo-24-23-2010 http://www.adv-geosci.net/24/23/2010/ http://www.adv-geosci.net/24/23/2010/adgeo-24-23-2010.html http://www.adv-geosci.net/24/23/2010/adgeo-24-23-2010.pdf 23 34 2010-03-12 Picturing internal fractures of historical statues using ground penetrating radar method S. Kadioglu kadioglu@eng.ankara.edu.tr Y. K. Kadioglu Ankara University, Faculty of Engineering, Department of Geophysical Engineering, 06100 Tandogan/Ankara, Turkey The aim of the study is to formulate an approach to the monitoring of internal micro discontiniuties in a hybrid 2-D/3-D image of ground penetrating radar (GPR) data gathered on historical monument groups, and to indicate methodologically rearranging amplitude-color scale and its opacity functions to activate micro fractures in monument groups including three colossal women, three men, and 24 lion statues in Mustafa Kemal ATATÜRK's mausoleum (ANITKABIR) in Ankara, Turkey. Additionally, this paper illustrates the use of petrographic research to describe the monument and its groups. To achieve the aim, data measurements were carried out on the monument groups with spaced 10 cm profiles and 1.6 GHz antenna. <br><br> The 3-D image was transparent 3-D volumes of the GPR data set that highlighted internal micro fractures and cavities in the statues. Rearranging appropriate amplitude-color scale and formulating the opaque of the data sets were the keys to the transparent 3-D data visualizations. As a result, the internal fractures and cavities were successfully visualized in the three women, three men and twenty-four lion statues. Micro fractures were observed particularly at the rim of the vesicular of the rocks under a polarizing microscope. Daniels, J. J.: Ground penetrating radar for imaging archaeological objects in the subsurface, Proceedings of the New Millennium International Forum on Consideration of Cultural Property, Kongju, Korea, 247–265, 2000. Grasmueck, M., Weger, R., and Horstmeyer, H.: Full-resolution 3-D GPR imaging, Geophysics, 70(1), K12–K19, 2005. Kadioglu, S.: Photographing Layer Thicknesses and Discontinuities in a Marble Quarry with 3-D GPR Visualisation, J. Appl. Geophys., 64, 109–114, 2008. Kofman, L., Ronen, A., and Frydman, S.: Detection of model voids by identifying reverberation phenomena in GPR records, J. Appl. Geophys. , 59(4), 284–299, 2006. Tsoflias, G. P., Gestel, J-P. V., Stoffa, P. L., Blankenship, D. D., and Sen, M.: Vertical fracture detection by exploiting the polarization properties of ground-penetrating radar signals, Geophysics, 69(3), 803–810, 2004. Turkish General Staff (TSK): http://www.tsk.tr/anitkabir/anitkabiryerlesim.html.