PreprintArticleVersion 1Preserved in Portico This version is not peer-reviewed
Reconstruction of a Segment of the UNESCO World Heritage Hadrian’s Villa Tunnel Network by Integrated GPR, Magnetic-Paleomagnetic, and Electric Resistivity Prospections
Ghezzi, A.; Schettino, A.; Pierantoni, P.P.; Conyers, L.; Tassi, L.; Vigliotti, L.; Schettino, E.; Melfi, M.; Gorrini, M.E.; Boila, P. Reconstruction of a Segment of the UNESCO World Heritage Hadrian’s Villa Tunnel Network by Integrated GPR, Magnetic–Paleomagnetic, and Electric Resistivity Prospections. Remote Sens.2019, 11, 1739.
Ghezzi, A.; Schettino, A.; Pierantoni, P.P.; Conyers, L.; Tassi, L.; Vigliotti, L.; Schettino, E.; Melfi, M.; Gorrini, M.E.; Boila, P. Reconstruction of a Segment of the UNESCO World Heritage Hadrian’s Villa Tunnel Network by Integrated GPR, Magnetic–Paleomagnetic, and Electric Resistivity Prospections. Remote Sens. 2019, 11, 1739.
Ghezzi, A.; Schettino, A.; Pierantoni, P.P.; Conyers, L.; Tassi, L.; Vigliotti, L.; Schettino, E.; Melfi, M.; Gorrini, M.E.; Boila, P. Reconstruction of a Segment of the UNESCO World Heritage Hadrian’s Villa Tunnel Network by Integrated GPR, Magnetic–Paleomagnetic, and Electric Resistivity Prospections. Remote Sens.2019, 11, 1739.
Ghezzi, A.; Schettino, A.; Pierantoni, P.P.; Conyers, L.; Tassi, L.; Vigliotti, L.; Schettino, E.; Melfi, M.; Gorrini, M.E.; Boila, P. Reconstruction of a Segment of the UNESCO World Heritage Hadrian’s Villa Tunnel Network by Integrated GPR, Magnetic–Paleomagnetic, and Electric Resistivity Prospections. Remote Sens. 2019, 11, 1739.
Abstract
The UNESCO World Heritage Hadrian’s Villa lies over the Colli Albani volcanic district near Rome. Magnetic, paleomagnetic, radar, and electric resistivity surveys were performed in the Plutonium–Inferi sector to detect buried buildings and outline a segment of the underground system of tunnels that link different zones of the villa. In particular, a paleomagnetic analysis of the bedrock unit allowed to accomplish an accurate geomagnetic field modelling and characterize the archaeological sources of the magnetic field anomalies. We used a computer-assisted forward modelling procedure to generate a structural model of the sources of the observed anomalies. The intrinsic ambiguity of the magnetic field modelling was reduced with the support of ground penetrating radar amplitude slices and an analysis of radar and electric resistivity profiles. The bedrock lithology in this area is an ignimbrite tuff characterized by abundant iron oxides. The high-amplitude magnetic anomalies observed in the Plutonium–Inferi area are due to strong bedrock remnant magnetization and susceptibility contrasts between topsoil infill of cavities and the surrounding tuff. The resulting magnetization model of the Plutonium–Inferi complex shows that the observed anomalies are mostly due to the presence of tunnels, skylights and a system of ditches excavated in the tuff.
Keywords
archaeological geophysics; magnetic methods; ground penetrating radar; tunnel detection; data integration
Subject
Environmental and Earth Sciences, Geophysics and Geology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.