NIGERIAN SOURCES OF COPPER, LEAD AND TIN FOR THE IGBO-UKWU BRONZES

Autor:	Thurstan Shaw, A. C. Umeji, Paul T. Craddock, V. E. Chikwendu, R. M. Farquhar
Rok vydání:	1989
Předmět:	Archeology History Metallurgy Geochemistry chemistry.chemical_element Igbo Copper language.human_language law.invention Lead (geology) chemistry law language Radiocarbon dating Tin Geology
Zdroj:	Archaeometry. 31:27-36
ISSN:	1475-4754 0003-813X
DOI:	10.1111/j.1475-4754.1989.tb01053.x
Popis:	The composition of the bronzes excavated at Igbo-Ukwu in south-eastern Nigeria, radiocarbon dated around the 10th century AD, was shown to be exceptional for the time, and to be unusual in the high silver content. In some samples the isotopic ratios of the lead content were determined, as well as of some ore samples from the lead-zinc-copper field of the Benue Rift these sources are within 100 kilometers and show signs of ancient exploitation. The result of the analyses increases the probability that the copper of the Igbo-Ukwu bronzes was derived from within Nigeria and not from further afield, as was formerly supposed.
Databáze:	OpenAIRE
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