Lead isotope composition of Caledonian sulfide-bearing veins in Sweden

Linear trend in the ²⁰⁷ Pb/ ²⁰⁴ Pb vs. ²⁰⁶ Pb/ ²⁰⁴ Pb diagram, extending from a normal Caledonian lead composition ( ²⁰⁶ Pb/ ²⁰⁴ Pb nearly equal 17.9) to highly radiogenic values ( ²⁰⁶ Pb/ ²⁰⁴ Pb nearly equal 26.0). Early Proterozoic Svecokarelian basement as source of the radiogenic component. Selective leaching of different minerals in the Svecokarelian rocks and mixing with various proportions of nonradiogenic, Caledonian magmatic lead.--Modified journal abstract.

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