Research on investigation, analysis, and conservation of artifacts from Takashima underwater site

点击翻译按钮获取中文摘要

Research objects excavated from underwater site were investigated and analyzed for three years. Since most of the metal artefacts was buried in the underwater for a long time, encrusted with corrosion products unlike metal objects from terrestrial environments. As a result, it is often difficult to remove corrosion products from metal objects unearthed from underwater site, without loss of archaeological information. Then we adopted X-ray radiography and X-ray Computed Tomography to salvage encrusted information of metal artefacts with nondestructive method. To the next, the Japanese lacquer by sampling in part was analyzed layer structure. In addition to radiocarbon dating of the organic matter including Japanese lacquer was carried out, and it has checked that those artefacts were resulting from second Mongolian Invasion to Japan. Father X-ray fluorescence analysis was carried out about metal artefacts without iron artefacts and it investigated about identification of the material. As a result it has become possible to analyze those artefacts archaeologically in comparison with the artefacts unearthed from terrestrial environment. Finally, it has become possible to guess about manufactured technique