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Using the historical atmospheric lead-deposition record as a chronological marker in sediment deposits in Europe

Richard Bindler

Maja-Lena Brännvall

Department of Ecology and Environmental Science, Umeå University, SE-901 87 Umeå, Sweden

Atmospheric deposition of large-scale lead pollution has occurred for at least 3000 years in Europe. Metal production and smelting were the main sources until the twentieth century when emissions from vehicles using alkyl-leaded petrol became dominant. Analyses of lake-sediment and peat deposits in Sweden and other regions in Europe, as well as ice cores from Greenland, suggest synchronous temporal changes in past pollution deposition. Characteristic features in the atmospheric pollution fallout were caused by: the peak in lead pro duction during the Roman period; the marked Mediaeval increase in mining and metal production; the rapidly increasing use of cars and leaded gasoline after the second world war along with increased industrial emissions until around 1970, which was followed by a major improvement due to environmental legislation. For northern Europe at least, these characteristic changes can be used to determine, with reasonable accuracy, at which levels ad 0, ad 1000–1200 and ad 1970 are situated in lake-sediment deposits. To identify these levels, stable lead isotope analyses (²⁰⁶Pb/²⁰⁷Pb ratios) have proven to be very useful besides concentration determinations. Particularly useful are the isotope analyses in areas, such as Sweden, where the differences in ²⁰⁶Pb/²⁰⁷Pb ratios are large between the natural catchment lead and the pollution lead.

Key Words: Lead pollution • stable lead isotopes • chronology • dating • marker horizon • lake sediments • peat bogs • late Holocene • Europe

The Holocene, Vol. 11, No. 5, 511-516 (2001)
DOI: 10.1191/095968301680223468


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