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Metallurgy at the Crossroads: New Analyses of Copper-based Objects at Tianshanbeilu, Eastern Xinjiang, China

Acta Geologica Sinica(English Edition) 2020年第3期94卷 594-602页

作者： LIU Cheng LIU Ruiliang ZHOU Pengcheng LU Chun YANG Zengxin A.Mark POLLARD Peter HOMMEL MA Jian CUI Jianfeng Peter BRAY TONG Jianyi Jessica RAWSON School of Cultural Heritage Northwest UniversityXi’an 710069China Research Center of Material Science and Archaeology NPU Institute of Culture and HeritageNorthwestern Polytechnical UniversityXi’an 710072China School of Archaeology University of OxfordOxfordUK(OX13TG Xi’an Museum Xi’an 710068China Shandong University of Finance and Economics Library Jinan 250012China School of Electronic Engineering Xidian UniversityXi’an 710068China Department of Archaeology Classics and EgyptologyUniversity of LiverpoolLiverpoolUK(L77BD School of Archaeology and Museology Peking UniversityBeijing 100871China British Museum LondonUK(WC1B 3DG Department of Archaeology University of ReadingReadingUK(RG66AB

Tianshanbeilu is the largest Bronze Age site in eastern Xinjiang, China. Stretching across the entire second millennium BC, it performed a prominent role in connecting the Hexi corridor, Central China and the steppe. A further insight into the metallurgical tradition and the metal supply network is of vital importance to improve our understanding of its multi-connected nature. This paper offers a new set of chemical and isotopic data on the copper-based objects at Tianshanbeilu, including alloying elements, trace elements(impurities) and lead isotopes. Combining the concentrations of arsenic and antimony reveals that arsenic was introduced to copper partially due to the use of specific minerals tethrahedrite-tennantite. lead isotopes demonstrate that multiple sources of copper were employed at Tianshanbeilu and a majority of them are characterized by common lead, which appears rather different from those of the Central Plains and the Hexi corridor, but highly consistent with local ores. Surprisingly, one object at Tianshanbeilu contains the well-known highly radiogenic lead. This object undoubtedly marks the westernmost boundary of the distribution of the highly radiogenic lead. We also anticipate that more lead isotopic analyses in NW China will further contribute to the study of the highly radiogenic lead in Central China.

关键词： highly radiogenic lead chemical and isotopic analysis metallurgy Tianshanbeilu

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