Lead isotope analysis dating
In the water phase 210Pb is adsorbed to particulate matter and together they are deposited in the sediment. The remaining amount of 210Pb at a certain depth will reveal the age of the given sediment layer.
This dating method covers the past period of 75-100 years due to the half-life of about 22 years.
Thus, it will be possible not only to describe the sediment age, but also to give a picture of the dominant mixture of plankton alga at the same time.
Sediment studies may also be supplemented with determinations of e.g. Method Decay of uranium in the earth's crust releases the gas radon.
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The method is suitable for dating approximately 100 years back.
Service DHI offers dating of sediment cores by means of the 210Pb method and may assist with sampling in both marine and freshwater systems.
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