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Igbo-Ukwu Metal Sourcing
The composition of the metal alloys used in the production of the bronze is unique, with an unusually high silver content and is distinct from alloys used in Europe, the Mediterranean or other African bronze centers.[19]  // About 85-90% of the metal ore used to produce the bronze originated from old mines in Abakiliki about 100 kilometers from Igbo-Ukwu. . This finding is corroborated by recent lead isotope and silver content analysis of fragmented metal objects. A small percentage of ores are thought to have originated from a secondary source. However, an exact location has not been confirmed. Potential sources include North African countries like Tunisia and Morocco, per lead isotope analyses of copper-tin alloys.