Nature Does the Averaging—In-Situ Produced 10Be, 21Ne, and 26Al in a Very Young River Terrace
by
Andreas Gärtner 1,2
, Silke Merchel 2,3,*, Samuel Niedermann 4, Régis Braucher 5, ASTER-Team 5,†, Peter Steier 6, Georg Rugel 2,3, Andreas Scharf 2, Loic Le Bras 1,7 and Ulf Linnemann 1
Andreas Gärtner 1,2, Silke Merchel 2,3,*, Samuel Niedermann 4, Régis Braucher 5, ASTER-Team 5,†, Peter Steier 6, Georg Rugel 2,3, Andreas Scharf 2, Loic Le Bras 1,7 and Ulf Linnemann 1
1
Senckenberg Naturhistorische Sammlungen Dresden (SNSD), Museum für Mineralogie und Geologie, Sektion Geochronologie, 01109 Dresden, Germany
2
Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany
3
Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Helmholtz Institute Freiberg for Resource Technology, 01328 Dresden, Germany
4
Deutsches GeoForschungsZentrum (GFZ), 14473 Potsdam, Germany
5
Aix-Marseille University, CNRS, IRD, Coll. France, INRAE, CEREGE UM 34, 13545 Aix-en-Provence, France
6
Fakultät für Physik-lsotopenphysik, Universität Wien, 1090 Wien, Austria
7
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; https://doi.org/10.3390/geosciences10060237
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.
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MDPI and ACS Style
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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