Abstract
Pb-210 activity has been measured in tidal flat sediments from the Dutch-German Waddensea. It is shown that it can be successfully used to estimate the rate of deposition in areas of intertidal mud deposition, which could be ascertained by absolute dates obtained from soundings and pollen. There is a marked grain size efect and there are indications that Pb-210 and/or Po-210 are enriched in the organic fraction. The degree of reworking was estimated by comparing the Pb-210 age of undisturbed mud layers with absolute ages estimated from repeated soundings. At least 40–90% of the deposited mud was reworked from older sediments. Resuspended old mud acquires within 6.5–9.5 days a Pb-210 activity as is usually found in fresh recent muds. The residence time of Pb-210 in the Waddensea is 43 days.
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Eisma, D., Berger, G.W., Wei-Yue, C., Jian, S. (1989). Pb-210 as a tracer for sediment transport and deposition in the Dutch-German Waddensea. In: van der Linden, W.J.M., Cloetingh, S.A.P.L., Kaasschieter, J.P.K., van de Graaff, W.J.E., Vandenberghe, J., van der Gun, J.A.M. (eds) Coastal Lowlands. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-1064-0_16
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DOI: https://doi.org/10.1007/978-94-017-1064-0_16
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