Element separation chemistry and cosmogenic 10Be dating of a ferromanganese crust

D. Koll*, A. Wallner, S. Battisson, S. Fichter, L. K. Fifield, M. B. Froehlich, J. Lachner, S. Merchel, S. Pavetich, G. Rugel, Z. Slavkovská, S. G. Tims, R. Ziegenrücker

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    1 Citation (Scopus)

    Abstract

    Oceanic archives are contemporary witnesses of Earth's recent astrophysical history by incorporating extraterrestrial radionuclides. VA13/2 - 237KD is one of the most studied ferromanganese crusts and it has been shown that the crust contains live interstellar 60Fe. Here, we have characterized a large piece of this crust with a 3D optical scan, a micro-CT scan and 3D modeling, followed by the chemical extraction of highly purified, element-specific fractions for accelerator mass spectrometry. High-accuracy cosmogenic 10Be dating of two independent drill-holes showed a time-dependent variability in growth rate across the surface of the crust. This well-characterized crust is used to search for interstellar radionuclides, such as supernova-produced 60Fe and the r-process nuclide 244Pu. Other extraterrestrial radionuclides including 26Al, 53Mn, 129I, 182Hf or 247Cm could be investigated in the future.

    Original languageEnglish
    Pages (from-to)53-58
    Number of pages6
    JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
    Volume530
    DOIs
    Publication statusPublished - 1 Nov 2022

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