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Lead

Submitted by curator on Wed, 10/14/2015 - 21:53

Scatterplot for Lead (ED III v. Akk)

Like the arsenic, the lead in all the Ur copper-based artifacts in this study most likely derives from the original copper ore, its variation (from near-trace levels to around 2.7%) simply reflecting differences in the conditions of smelting of the original copper ore (Tylecote et al. 1977). 

ED III range: <0.027%–2.7% (n=48)
Mean: 0.48% ± 0.09% (1 standard error)
Highest Pb-level: Shafthole axe (inv. B17479)

Akkadian range: <0.032%–1.8% (n=36)
Mean: 0.36% ± 0.07% (1 standard error)
Highest Pb-level: Bracelet (inv. B17017)

B17017: Bracelet
As, 2.0%; Sn, <0.014%; Pb, 1.8%