Abstract
Abstract Galena in drill core samples from sandstone-lead deposits in the Dorotea district in the Caledonian Front was analysed for its lead isotope composition. Six samples were taken from Bellvikserg and three from the minor deposit of Ormsjö. The composition of all samples was highly radiogenic with 206Pb/204Pb-ratios between 22 and 23, and 207Pb/204Pb-ratios in the range 16.0 to 16.2. Plotted on a207Pb/204Pb versus 206Pb/204Pb diagram, the Dorotea lead follows a linear trend together with lead from Laisvall and Vassbo, suggesting their radiogenic component to be derived from source rocks of Svecokarelian age.
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