[M-IS02] Geomaterials in cultural heritage: weathering, investigation techniques, and conservation

[MIS02-P01] Investigation of simple and rapid analysis of weathering product minerals by in-situ nondestructive survey

Kamoshida Tomoki², *Chiaki T. Oguchi¹ (1.Institute for Environmental Science and Technology, Graduate School of Science and Engineering, Saitama University, 2.Civil and Environmental Engineering Program, Saitama University )

Keywords:pack test, ion meter, XRD, portable microscope, salt minerals

The purpose of this study was to investigate better methods for simple analysis of weathering product minerals at sites where rapid analysis is not possible in distant locations overseas or in Japan, or where taking samples back to the site is prohibited. Simple and rapid analysis by in-situ nondestructive survey was conducted at the Yoshimi Hyakunana Historic Site of an underground munitions factory, the Taya Cave in Yokohama City, and the Nogi-machi Brick Kiln in Nogi-machi. The usefulness of the results obtained by simple and rapid analysis was confirmed by mineral identification and chemical analysis using XRD and XRF-EDX. As a result, it was possible to narrow down the elements contained in the precipitated salt from the pack test of the simple survey. On the other hand, although it is more difficult to estimate when the mineral composition becomes more complex, the chemical composition could be determined, which proved to be very useful for field considerations. In other words, the results suggest that simple analysis is sufficient to consider the chemical composition of minerals with relatively simple structures.