Citation:

PANGAEA.949393

Name: Bayesian age-depth modelling applied to varve counting and radiometric dating to develop a high-resolution chronology for a new composite sediment profile from Holzmaar (Germany)
Published: 2022-10-05
License: https://creativecommons.org/licenses/by/4.0/
Keywords: age-depth model; Bayesian Modeling; Holzmaar; radiometric dating; varves

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Abstract:

Four different age-depth models have been calculated for a new sediment profile (HZM19) from Holzmaar (425 m a.s.l., 50°7'8'' N, 6°52' 45'' E) using Bayesian statistics with Bacon (version 4.1.1) for the R programming language and the latest radiocarbon calibration curve Intcal20. Model A is based on previously published radiocarbon measurements only, while the three Models B, C and D integrate the previously published varve chronology (VT-99) applying different approaches. Model B rests upon radiocarbon data, while parameter settings are derived from sedimentation rates of VT-99. Model C is based on radiocarbon dates and on VT-99 as normal-distributed tie-points. Model D is segmented into four sections: Sections 1 and 3 are based on VT-99, whereas Sections 2 and 4 are based on Bacon models including additional information from VT-99. All models cover an age range of approx. 16,000 years for a composite depth of 14.6 m. The varve chronology was transferred to HZM19 using 43 predefined marker layers and 41 radiocarbon sampling positions with their specific VT-99 age and error. In addition, Pb-210 and Cs-137 activities (61 samples with a thickness of 2 cm each) have been measured for the top of HZM19. With this exercise, VT-99 was updated and efficiently applied to HZM19 providing a very precise age-depth model for these new sediment cores, which will value all ongoing and high-resolution investigations for a better understanding of decadal Holocene environmental and climatic variabilities.

Keyword(s):

age-depth model; Bayesian Modeling; Holzmaar; radiometric dating; varves

Supplement to:

Birlo, Stella; Tylmann, Wojciech; Zolitschka, Bernd (2023): Bayesian age–depth modelling applied to varve and radiometric dating to optimize the transfer of an existing high-resolution chronology to a new composite sediment profile from Holzmaar (West Eifel Volcanic Field, Germany). Geochronology (GChron), 5(1), 65-90, https://doi.org/10.5194/gchron-5-65-2023

Further details:

Hajdas, Irena; Ivy-Ochs, Susan D; Bonani, Georges; Lotter, André F; Zolitschka, Bernd; Schlüchter, Christian (1995): Radiocarbon age of the Laacher See Tephra: 12.230 +/- 40 BP. Radiocarbon, 37(2), 149-154, https://doi.org/10.1017/S0033822200030587

Hajdas, Irena; Zolitschka, Bernd; Ivy-Ochs, Susan D; Beer, Jürg; Bonani, Georges; Leroy, Suzanne A G; Negendank, Jörg F W; Ramrath, Matthias; Suter, Martin (1995): AMS radiocarbon dating of annually laminated sediments from lake Holzmaar, Germany. Quaternary Science Reviews, 14(2), 137-143, https://doi.org/10.1016/0277-3791(94)00123-S

Zolitschka, Bernd; Brauer, Achim; Stockhausen, Hagen; Lang, Andreas; Negendank, Jörg F W (2000): Annually dated late Weichselian continental paleoclimate record from the Eifel, Germany. Geology, 28(9), 783-786, https://doi.org/10.1130/0091-7613(2000)28%3C783:ADLWCP%3E2.0.CO;2

Coverage:

Latitude: 50.116670 * Longitude: 6.883333

Date/Time Start: 2019-08-11T00:00:00 * Date/Time End: 2019-08-17T00:00:00

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)