Multimethod characterization of terracotta figurines and lime mortar from the elite burials Shoroon Bumbagar I and II,Mongolia

The multi-analytical approach, including X-ray fluorescence (XRF), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy with X-ray (SEM-EDX), was applied to terracotta figurines, mural plaster, and local clay sources coming from two elite burials in Mongolia—Shoroon Bumbagar I and Shoroon Bumbagar II—dated to the second half of the VII century AD. The aims of this study were: (1) by comparing the major composition of body samples with those of the ancient Tang sancai kilns to identify the origin of raw materials; and (2) to track changes in the manufacturing technology. Analysis of CaO, Fe₂O₃, TiO_2, and K₂O, which were crucial for distinguishing the provenance of red bodies, confirmed the local production of terracotta figurines. Furthermore, this study helped us attain a deeper understanding of the Tang sancai at both Shoroon Bumbagar sites, geographically located on both banks of the Tuul River yet separated in time by a few decades; it suggests the movement of two groups of artisans using different technologies to make Tang sancai locally by incorporating local tastes and traditions.