Stone structures are susceptible to weathering and erosion over time, necessitating the identification and elimination of damaging factors to ensure their preservation. This research focused on diagnosing the damage to the tomb of Xerxes located at the historical site of Naqsh-e Rostam through a multidisciplinary approach encompassing library research, field observations, laboratory analyses, and geological studies. Petrographic studies revealed that the rocks comprising the tomb belong to the Seruk Formation. The sedimentary sequence within this formation exhibited thick and light-colored limestone layers. Utilizing the geophysical technique of Ground Penetrating Radar (GPR), two major fractures were identified along the boundaries of the tomb. These fractures predominantly followed north-south and east-west orientations. The intersection of these fracture sets, combined with the layering surfaces, resulted in the development of dissolution phenomena, leading to the formation of dissolution holes and cavernous porosity on the structure. Additionally, field studies investigated the presence of plants and cyanobacterial lichens on the tomb.
Mohammad Reza Alikhah, Anisa Shiri , Shahrazad Amin Shirazi , Mohammad Hossein Boroumand, Volume 7, Issue 2 (9-2024)
Abstract
Restoration of historical monuments relies heavily on comprehensive documentation conducted both before and after conservation and restoration processes. This study focused on documenting the cleaning process of Iran's Salt Men through the integration of various photographic techniques and specialized focus stacking software. Specifically, it examined the documentation of Salt Man, No. 1, housed in the National Museum of Iran by utilizing a combination of focus stacking and panorama techniques. The project aimed to produce high-resolution images from 5 different angles, capturing the complete depth of field before and after cleaning. The largest image generated in this project boasted a pixel density of 649.4 megapixels, showcasing the frontal view of the artifact. Several challenges arose duringthe project. The presence of hair on the head and face of Salt Man, No. 1, posed difficulties in photo alignment. Additionally, documenting the gold earrings using macrography presented another set of challenges. It is important to note that the documentation, conservation, and restoration of the artifact were carried out simultaneously. Consequently, close coordination with other members of the conservation and restoration team was crucial and meticulous recording of lighting angles, camera settings, and photometry were prioritized. Detailed documentation was carefully recorded both before and after the cleaning process, taking special care to note the conditions during photography and ensuring accurate color, light, and texture matching. This comprehensive approach established a robust foundation for artifact's future scientific monitoring.
