The restored opus sectile panel from the luxurious episcopal residence in the ancient city of Stobi–mineralogical and chemical findings

Samples from the opus sectile panel excavated from the Episcopal Residence building at the archaeological site of Stobi were examined using X-ray powder diffraction, SEM-EDS, and Raman spectroscopy. The analyzed samples, exhibiting plentiful color and surface variations, comprise the reconstructed sectile panel as well as represent the in situ ground remains. The complementary techniques revealed dominant amorphous phase in five samples, whereas the remaining seven specimens confirmed the presence of magnesite, quartz, dolomite, ankerite, cuprite, wüstite, and hematite. The work represents the first systematic attempt to determine the mineral phases in the restored opus sectile panel, assembled by decorative minerals forming a geometric net of polychrome crosses. Furthermore, the mineral characterization has revealed an origin of mineral species not typical for Macedonian terrain (ankerite, wüstite, cuprite, transparent quartz) that lead to the conclusion that the samples were likely imported from other early-Christian communities.     

二里头文化研究的新视角——从青铜器的铅同位素比值看二里头四期的文化性质

对于二里头文化的性质问题,学术界已进行了数十年的讨论,然而直到目前,共识却仍未能达成。本文首次从青铜器铅同位素比值分析入手,对二里头文化的性质问题予以探讨。经过对偃师二里头、郑州二里岗、黄陂盘龙城、安阳殷墟等遗址出土青铜器的铅同位素比值数据的分析与讨论,我们支持二里头文化一至三期属夏文化、第四期遗存则已进入了商代纪年的观点。