In recent years,portable X-ray fluorescence spectrometers(p-XRF)have become an important non-destructive and portable testing method in the provenance studies of turquoise.This study employs p-XRF to test and analyze the turquoise unearthed from the excavation of the Xuewei tomb no.l in the Reshui tomb cluster in the Dulan area in 2018,focusing on testing and analyzing its mineral sources.The archaeological findings from this tomb have been recognized as one of the"Top Ten Archaeological Discoveries in China in 2020"and have yielded a large number of turquoise artifacts.Through principal component analysis of multiple elements,there is a consistent overlap between the Reishui and Wulan samples.This provides evidence that,at least during the 8th century AD,local turquoise in Qinghai might have been exploited and utilized.In addition,it is highly likely that local turquoise were exported as commodities to both the East and the West.
Xuewei tomb no.1 from the excavation in 2018Wulan turquoiseProvenance analysis