Strengthening potential of recent peat dating.

Autor: Cwanek A; Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342, Cracow, Poland. Electronic address: anna.cwanek@ifj.edu.pl., Aquino-Lopez MA; University of Cambridge, Department of Geography, Downing Place, Cambridge, CB2 3EN, United Kingdom., Kołaczek P; Adam Mickiewicz University, Faculty of Geographical and Geological Sciences, Krygowskiego 10, 61-680, Poznan, Poland., Lamentowicz M; Adam Mickiewicz University, Faculty of Geographical and Geological Sciences, Krygowskiego 10, 61-680, Poznan, Poland., Fiałkiewicz-Kozieł B; Adam Mickiewicz University, Faculty of Geographical and Geological Sciences, Krygowskiego 10, 61-680, Poznan, Poland., Gałka M; University of Lodz, Faculty of Biology and Environmental Protection, Banacha 1/3, 90-231, Lodz, Poland., Słowiński M; Institute of Geography and Spatial Organization, Polish Academy of Sciences, Twarda 51/55, 00-818, Warsaw, Poland., Łuców D; Institute of Geography and Spatial Organization, Polish Academy of Sciences, Twarda 51/55, 00-818, Warsaw, Poland., Marcisz K; Adam Mickiewicz University, Faculty of Geographical and Geological Sciences, Krygowskiego 10, 61-680, Poznan, Poland., Obremska M; Institute of Geological Sciences, Polish Academy of Sciences, Twarda 51/55, 00-818, Warsaw, Poland., Czerwiński S; Adam Mickiewicz University, Faculty of Geographical and Geological Sciences, Krygowskiego 10, 61-680, Poznan, Poland; University of Gdańsk, Department of Geomorphology and Quaternary Geology, Bażyńskiego 4, 80-309, Gdansk, Poland., Łokas E; Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342, Cracow, Poland.
Jazyk: angličtina
Zdroj: Journal of environmental radioactivity [J Environ Radioact] 2024 Dec 09; Vol. 282, pp. 107594. Date of Electronic Publication: 2024 Dec 09.
DOI: 10.1016/j.jenvrad.2024.107594
Abstrakt: This study concerned high-resolution age reconstructions of modern organic deposits collected from peatlands distributed in Central Europe. The main focus was on 210 Pb radioisotope as a fundamental geochronometer along with 14 C and 239+240 Pu radioisotopes used for dating verification. In addition to simple classical models such as CF/CS or CF, the new approach formulated upon the Plum method was implemented. Examined peat profiles with usually poorly defined equilibrium depth revealed a high complexity manifested by vertical variability of both 210 Pb activity concentration and bulk density. The performance of dating models required prior slight corrections, which led to reliable and accurate chronologies for most of the profiles, representing various peatland types (bogs, poor fens and fens). Moreover, the age series of different 210 Pb models were highly consistent for a given core. The 210 Pb inventory and flux assessment exhibited maxima (SE, 1σ) of 8450 (90) Bq m -2 and 280 (20) Bq m -2 y -1 , respectively, reflecting an elevated level of 222 Rn exhalation in the Sudetes region. No statistically significant regularities were found in the geographical distribution of 210 Pb fluxes or accumulation rates.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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