Understanding the Pb Method. In the real world, cores are often not 'perfect' and they exhibit deviations from the ideal data set: DHI offers dating of sediment cores by means of the Pb method and may assist with sampling in both marine and freshwater systems. Please go to http: For additional information, contact Dr. The Pb which falls into a lake or ocean tends to end up in the sediments over the next few months and becomes permanently fixed on the sediment particles.
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.
Dating of Sediments using Lead-210
The radioactive element uranium has an almost infinite half-life 4. A series of these age calculations can be used to develop a graph of age vs. An iterative best fit computer model was designed to process the data in cases where the Po background activity is not known. DHI offers dating of sediment cores by means of the Pb method and may assist with sampling in both marine and freshwater systems. It is actually the alpha emitting Po that we measure because it provides more accurate estimates of the Pb than will direct measurements of Pb The sediment samples must remain totally undisturbed during sampling to obtain the best possible dating. Pb that was incorporated into the sediments