Lead isotope analyses together with ore petrography were used to characterize in part, the copper and lead-bearing ores believed to have been mined in the Bronze Age from the Great Orme Mine, Llandudno, North Wales. The results reveal a tight correspondence between copper ores and excavated metal fragments from within the mine. Both sample sets fell within the established lead isotope fields generated by multivariate statistical analyses of the published lead data on Welsh ore mineralization. However, the analyses of galena from a stringer deposit within the mine show it to be an anomalous lead, having a different isotopic composition than that observed thus far, on ores from Northern Wales.
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