From radiometry to chronology of a marine sediment core: A 210Pb dating interlaboratory comparison exercise organised by the IAEA

Garcia-Tenorio, R.; Rozmaric, M.; Harms, A.; Godoy, J.M De Oliveira; Barsanti, M.; Schirone, A.; Ruiz-Fernández, A.C.; Sanchez-Cabeza, J.A.; McGinnity, P.; Fujak, M.; Eriksson, M.; Hatje, V.; Laissaoui, A.; Nguyen, H.Q.; Okuku, E.; Al-Rousan, Saber A.; Yii, M.W.; Heijnis, H.; Osvath, I.

From radiometry to chronology of a marine sediment core: A 210Pb dating interlaboratory comparison exercise organised by the IAEA

2020

Laboratories from 14 countries (with different levels of expertise in radionuclide measurements and ²¹⁰Pb dating) participated in an interlaboratory comparison exercise (ILC) related to the application of ²¹⁰Pb sediment dating technique within the framework of the IAEA Coordinated Research Project.The laboratories were provided with samples from a composite sediment core and were required to provide massic activities of several radionuclides and an age versus depth model from the obtained results, using the most suitable ²¹⁰Pb dating model. Massic concentrations of Zn and Cu were also determined to be used for chronology validation.The ILC results indicated good analytical performances while the dating results didn't demonstrate the same degree of competence in part due to the different experience in dating of the participant laboratories. The ILC exercise enabled evaluation of the difficulties faced by laboratories implementing ²¹⁰Pb dating methods and identified some limitations in providing reliable chronologies.

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