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Nature Does the Averaging—In-Situ Produced 10Be, 21Ne, and 26Al in a Very Young River Terrace

Senckenberg Naturhistorische Sammlungen Dresden (SNSD), Museum für Mineralogie und Geologie, Sektion Geochronologie, 01109 Dresden, Germany
Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany
Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Helmholtz Institute Freiberg for Resource Technology, 01328 Dresden, Germany
Deutsches GeoForschungsZentrum (GFZ), 14473 Potsdam, Germany
Aix-Marseille University, CNRS, IRD, Coll. France, INRAE, CEREGE UM 34, 13545 Aix-en-Provence, France
Fakultät für Physik-lsotopenphysik, Universität Wien, 1090 Wien, Austria
School of Geosciences, University of the Witwatersrand, Johannesburg 2050, South Africa
Author to whom correspondence should be addressed.
ASTER Team: Georges Aumaître, Didier Bourlès, Karim Keddadouche.
Geosciences 2020, 10(6), 237;
Received: 2 April 2020 / Revised: 10 June 2020 / Accepted: 15 June 2020 / Published: 18 June 2020
(This article belongs to the Section Geochemistry)
The concentrations of long-lived in-situ produced cosmogenic nuclides (10Be, 21Ne, 26Al) in quartz obtained from a very recent (~200 a; based on 14C data on organic material) terrace of the Swakop River in Namibia are nearly constant throughout a 322 cm-long depth profile. These findings corroborate earlier hypotheses postulating a homogeneous distribution of these nuclides in freshly deposited river terrace sediments. An averaged nuclide concentration is a crucial and generally assumed prerequisite for the determination of numerical ages of old sediments. View Full-Text
Keywords: cosmogenic nuclides; accelerator mass spectrometry; dating; river sediments cosmogenic nuclides; accelerator mass spectrometry; dating; river sediments
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Gärtner, A.; Merchel, S.; Niedermann, S.; Braucher, R.; ASTER-Team; Steier, P.; Rugel, G.; Scharf, A.; Le Bras, L.; Linnemann, U. Nature Does the Averaging—In-Situ Produced 10Be, 21Ne, and 26Al in a Very Young River Terrace. Geosciences 2020, 10, 237.

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