210Pb is widely used to determine accumulation rates in order to obtain a time scale in environmental samples. The most accurate method uses the determination of 210Pb via its grand-daughter 210Po by alpha spectrometry. Unfortunately this method requires a complex wet-chemistry procedure to achieve the separation of 210Po from its matrix. In this work a simplified procedure for the chemical separation of 210Po is proposed and applied to three marine sediment cores and a 10 m snow core collected in Antarctica. The calculated sedimentation rates for marine sediments range from 0.053 to 0.071 cm y-1. The mean annual accumulation rate for the snow is 16.6 cm y-1 w.e.. A comparison with literature data in the same region is given.

Marine sediments and snow from ross sea region (Antarctica) dating by 210 Pb method

Bettoli M. G.;Cantelli Lorenzo;Tositti L.;Tubertini O.
1998

Abstract

210Pb is widely used to determine accumulation rates in order to obtain a time scale in environmental samples. The most accurate method uses the determination of 210Pb via its grand-daughter 210Po by alpha spectrometry. Unfortunately this method requires a complex wet-chemistry procedure to achieve the separation of 210Po from its matrix. In this work a simplified procedure for the chemical separation of 210Po is proposed and applied to three marine sediment cores and a 10 m snow core collected in Antarctica. The calculated sedimentation rates for marine sediments range from 0.053 to 0.071 cm y-1. The mean annual accumulation rate for the snow is 16.6 cm y-1 w.e.. A comparison with literature data in the same region is given.
1998
Bettoli M.G.; Cantelli Lorenzo; Quarin D.; Ravanelli M.; Tositti L.; Tubertini O.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/899562
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