Articles | Volume 7, issue 1
https://doi.org/10.5194/gchron-7-59-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gchron-7-59-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
10 Mar 2025
Research article |
| 10 Mar 2025
| 10 Mar 2025
A direct comparison of single-grain and multi-grain aliquot luminescence dating of feldspars from colluvial deposits in KwaZulu-Natal, South Africa
Luminescence Physics, Department of Physics, Technical University of Denmark, Roskilde/Lyngby, Denmark
Institute of Geography, University of Cologne, Cologne, Germany
Guillaume Guérin
Géosciences Rennes, UMR 6118, CNRS, Bâtiment 15, Campus Beaulieu, Université de Rennes 1, 35042 Rennes, France
Kristina J. Thomsen
Luminescence Physics, Department of Physics, Technical University of Denmark, Roskilde/Lyngby, Denmark
Mariana Sontag-González
Institute of Geography, Justus-Liebig-Universität Giessen, 35390 Giessen, Germany
Matthias Blessing
Department of Early Prehistory and Quaternary Ecology, University of Tübingen, 72070 Tübingen, Germany
Deep History Lab, Department of Anthropology, University of Connecticut, Storrs, CT, USA
Greg A. Botha
Evolutionary Studies Institute, University of the Witwatersrand, Braamfontein, 2000, Johannesburg, South Africa
Max Hellers
Institute of Geology and Mineralogy, University of Cologne, Cologne, Germany
Gunther Möller
Department of Early Prehistory and Quaternary Ecology, University of Tübingen, 72070 Tübingen, Germany
Andreas Peffeköver
Institute of Geography, University of Cologne, Cologne, Germany
Christian Sommer
Institute of Geography, Department of Geosciences, University of Tübingen, Tübingen, Germany
The Role of Culture in Early Expansions of Humans, Heidelberg Academy of Sciences and Humanities, Tübingen, Germany
Anja Zander
Institute of Geography, University of Cologne, Cologne, Germany
Manuel Will
Department of Early Prehistory and Quaternary Ecology, University of Tübingen, 72070 Tübingen, Germany
Palaeo-Research Institute, University of Johannesburg, P.O. Box 524, Auckland Park, 2006, Johannesburg, South Africa
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Linda Andrea Elisabeth Maßon, Svenja Riedesel, Stephan Opitz, Anja Zander, Anthony Bell, Hanna Cieszynski, and Tony Reimann
EGUsphere, https://doi.org/10.5194/egusphere-2025-806, https://doi.org/10.5194/egusphere-2025-806, 2025
This preprint is open for discussion and under review for Geochronology (GChron).
Short summary
Short summary
We evaluate different methods for the potassium (K) concentration determination in feldspars and the impact of the K-concentrations on dose rate calculations for feldspar luminescence dating. Our results show discrepancies between published and our measured K-concentrations. Therefore, we emphasise to measure K-concentrations via bulk measurements and single-grain techniques to obtain more accurate results.
W. Marijn van der Meij, Svenja Riedesel, and Tony Reimann
SOIL, 11, 51–66, https://doi.org/10.5194/soil-11-51-2025, https://doi.org/10.5194/soil-11-51-2025, 2025
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Soil mixing (bioturbation) plays a key role in soil functions, but the underlying processes are poorly understood and difficult to quantify. In this study, we use luminescence, a light-sensitive soil mineral property, and numerical models to better understand different types of bioturbation. We provide a conceptual model that helps to determine which types of bioturbation processes occur in a soil and a numerical model that can derive quantitative process rates from luminescence measurements.
Linda Andrea Elisabeth Maßon, Svenja Riedesel, Stephan Opitz, Anja Zander, Anthony Bell, Hanna Cieszynski, and Tony Reimann
EGUsphere, https://doi.org/10.5194/egusphere-2025-806, https://doi.org/10.5194/egusphere-2025-806, 2025
This preprint is open for discussion and under review for Geochronology (GChron).
Short summary
Short summary
We evaluate different methods for the potassium (K) concentration determination in feldspars and the impact of the K-concentrations on dose rate calculations for feldspar luminescence dating. Our results show discrepancies between published and our measured K-concentrations. Therefore, we emphasise to measure K-concentrations via bulk measurements and single-grain techniques to obtain more accurate results.
Mariana Sontag-González, Madhav K. Murari, Mayank Jain, Marine Frouin, and Markus Fuchs
Geochronology Discuss., https://doi.org/10.5194/gchron-2024-36, https://doi.org/10.5194/gchron-2024-36, 2025
Preprint under review for GChron
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We tested the reliability of infrared-radiofluorescence (IR-RF) dating of K-feldspar on samples of known age. We compare several measurement protocols and analysis variants and determine the most appropriate version. Additionally, we compare these results with those obtained using infrared photoluminescence (IRPL), an alternative dating method for K-feldspar, for the same samples. Our results confirm the dating potential of IR-RF and highlight similarities and differences to other methods.
W. Marijn van der Meij, Svenja Riedesel, and Tony Reimann
SOIL, 11, 51–66, https://doi.org/10.5194/soil-11-51-2025, https://doi.org/10.5194/soil-11-51-2025, 2025
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Soil mixing (bioturbation) plays a key role in soil functions, but the underlying processes are poorly understood and difficult to quantify. In this study, we use luminescence, a light-sensitive soil mineral property, and numerical models to better understand different types of bioturbation. We provide a conceptual model that helps to determine which types of bioturbation processes occur in a soil and a numerical model that can derive quantitative process rates from luminescence measurements.
Mariana Sontag-González, Raju Kumar, Jean-Luc Schwenninger, Juergen Thieme, Sebastian Kreutzer, and Marine Frouin
Geochronology, 6, 77–88, https://doi.org/10.5194/gchron-6-77-2024, https://doi.org/10.5194/gchron-6-77-2024, 2024
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This is a preliminary study using a synchrotron light source to generate elemental maps, incorporating oxidation states, with a spatial resolution of <1 µm for individual grains within the K-feldspar density fraction. The elemental fingerprint characterizing grains with a signal suitable for infrared radiofluorescence dating reveals high levels of K, Pb, and Ba coupled with low levels of Fe and Ca. In contrast, grains exhibiting higher proportions of Fe and Ca produce an odd signal shape.
Thomas Kolb, Konrad Tudyka, Annette Kadereit, Johanna Lomax, Grzegorz Poręba, Anja Zander, Lars Zipf, and Markus Fuchs
Geochronology, 4, 1–31, https://doi.org/10.5194/gchron-4-1-2022, https://doi.org/10.5194/gchron-4-1-2022, 2022
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Guillaume Guérin, Christelle Lahaye, Maryam Heydari, Martin Autzen, Jan-Pieter Buylaert, Pierre Guibert, Mayank Jain, Sebastian Kreutzer, Brice Lebrun, Andrew S. Murray, Kristina J. Thomsen, Petra Urbanova, and Anne Philippe
Geochronology, 3, 229–245, https://doi.org/10.5194/gchron-3-229-2021, https://doi.org/10.5194/gchron-3-229-2021, 2021
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This paper demonstrates how to model optically stimulated luminescence (OSL) and radiocarbon ages in a Bayesian framework, using a dedicated software tool called BayLum. We show the effect of stratigraphic constraints, of modelling the covariance of ages when the same equipment is used for a series of OSL samples, and of including independent ages on a chronological inference. The improvement in chronological resolution is significant.
Dominik Brill, Simon Matthias May, Nadia Mhammdi, Georgina King, Benjamin Lehmann, Christoph Burow, Dennis Wolf, Anja Zander, and Helmut Brückner
Earth Surf. Dynam., 9, 205–234, https://doi.org/10.5194/esurf-9-205-2021, https://doi.org/10.5194/esurf-9-205-2021, 2021
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Wave-transported boulders are important records for storm and tsunami impact over geological timescales. Their use for hazard assessment requires chronological information. We investigated the potential of a new dating technique, luminescence rock surface exposure dating, for estimating transport ages of wave-emplaced boulders. Our results indicate that the new approach may provide chronological information on decadal to millennial timescales for boulders not datable by any other method so far.
A. Zander and A. Hilgers
Clim. Past, 9, 719–733, https://doi.org/10.5194/cp-9-719-2013, https://doi.org/10.5194/cp-9-719-2013, 2013
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We study the use of zircons as dosimeters using modern techniques, highlighting their advantages such as time-invariant dose rates. We explore the correlation between zircon geochemistry and luminescence properties, observe fast zircon optically stimulated luminescence (OSL) bleaching rates, and assess the potential of auto-regeneration. Low OSL sensitivities require combining natural OSL and auto-regenerated thermoluminescence (TL), with the potential to enhance age accuracy and precision.
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Accurate readings on the environmental gamma dose rate are important. Portable gamma-ray detectors, such as NaI or LaBr3-based, are easy to handle and affordable. Limited information on alternatives, like CZT (Cadmium Zinc Telluride) detectors is available. We tested CZT detectors and found them suitable for in-field deployment. We used simulations and field tests to evaluate the optimal energy threshold for direct dose rate readings, making the CZT system a reliable alternative.
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Geochronology, 6, 77–88, https://doi.org/10.5194/gchron-6-77-2024, https://doi.org/10.5194/gchron-6-77-2024, 2024
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Geochronology, 5, 405–412, https://doi.org/10.5194/gchron-5-405-2023, https://doi.org/10.5194/gchron-5-405-2023, 2023
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Here, we present the lighting setting implemented in the new Luminescence Dating Research Laboratory at Stony Brook University, USA. First, we performed spectral measurements on different light sources and filters. Then, we measured the loss of dose in quartz and feldspar samples when exposed to various light sources and durations. Finally, we conclude that our lighting setting is suitable for a luminescence darkroom laboratory; it is simple, inexpensive to build, and durable.
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Geochronology, 5, 377–389, https://doi.org/10.5194/gchron-5-377-2023, https://doi.org/10.5194/gchron-5-377-2023, 2023
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Sebastian Kreutzer, Steve Grehl, Michael Höhne, Oliver Simmank, Kay Dornich, Grzegorz Adamiec, Christoph Burow, Helen M. Roberts, and Geoff A. T. Duller
Geochronology, 5, 271–284, https://doi.org/10.5194/gchron-5-271-2023, https://doi.org/10.5194/gchron-5-271-2023, 2023
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The concept of open data has become the modern science meme. Funding bodies and publishers support open data. However, the open data mandate frequently encounters technical obstacles, such as a lack of a suitable data format for data sharing and long-term data preservation. Such issues are often community-specific and demand community-tailored solutions. We propose a new human-readable data format for data exchange and long-term preservation of luminescence data called XLUM.
Melanie Bartz, Jasquelin Peña, Stéphanie Grand, and Georgina E. King
Geochronology, 5, 51–64, https://doi.org/10.5194/gchron-5-51-2023, https://doi.org/10.5194/gchron-5-51-2023, 2023
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Chemical weathering alters the chemical composition of mineral grains, and it follows that luminescence dating signals may also be progressively modified. We artificially weathered feldspar samples under different chemical conditions to understand the effect of feldspar partial dissolution on their luminescence properties. Only minor changes were observed on luminescence dating properties, implying that chemical alteration of feldspar surfaces may not affect luminescence dating signals.
Alastair C. Cunningham, Jan-Pieter Buylaert, and Andrew S. Murray
Geochronology, 4, 517–531, https://doi.org/10.5194/gchron-4-517-2022, https://doi.org/10.5194/gchron-4-517-2022, 2022
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Mineral grains within sediment or rock absorb a radiation dose from the decay of radionuclides in the host matrix. For the beta dose component, the estimated dose rate must be adjusted for the attenuation of beta particles within the mineral grains. We show here that the mean dose rate to dosimeter grains in a granular matrix is dependent on the grain-size distributions of the source grains, the bulk sediment, and the grain size of the dosimeters.
Norbert Mercier, Jean-Michel Galharret, Chantal Tribolo, Sebastian Kreutzer, and Anne Philippe
Geochronology, 4, 297–310, https://doi.org/10.5194/gchron-4-297-2022, https://doi.org/10.5194/gchron-4-297-2022, 2022
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Dosimetric dating methods based on the analysis of luminescence signals emitted by granular minerals extracted from sedimentary deposits now play an important role in the study of the Quaternary. Here we propose a new approach in which the age of the deposit is calculated by combining the equivalent dose and dose-rate distributions. The underlying Bayesian mathematical model and its implementation via an R code are provided, together with the results obtained for a finite set of configurations.
Barbara Mauz, Paul J. Nolan, and Peter G. Appleby
Geochronology, 4, 213–225, https://doi.org/10.5194/gchron-4-213-2022, https://doi.org/10.5194/gchron-4-213-2022, 2022
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It is of critical importance to dosimetric dating techniques that the quantity of the radiation dose is estimated accurately. Here we describe gamma spectrometry in terms of instrument, measurement procedures, and data analyses required for estimating parent nuclide activities. The description includes analytical procedures required to generate data with sufficient accuracy and precision for samples in secular equilibrium. We also outline procedures required to quantify disequilibrium.
Thomas Kolb, Konrad Tudyka, Annette Kadereit, Johanna Lomax, Grzegorz Poręba, Anja Zander, Lars Zipf, and Markus Fuchs
Geochronology, 4, 1–31, https://doi.org/10.5194/gchron-4-1-2022, https://doi.org/10.5194/gchron-4-1-2022, 2022
Short summary
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The µDose system is an innovative analytical instrument developed for the cost- and time-efficient determination of environmental radionuclide concentrations required for the calculation of sedimentation ages in palaeo-environmental and geo-archaeological research. The results of our study suggest that accuracy and precision of µDose measurements are comparable to those of well-established methods and that the new approach shows the potential to become a standard tool in environmental dosimetry.
Rachel K. Smedley, David Small, Richard S. Jones, Stephen Brough, Jennifer Bradley, and Geraint T. H. Jenkins
Geochronology, 3, 525–543, https://doi.org/10.5194/gchron-3-525-2021, https://doi.org/10.5194/gchron-3-525-2021, 2021
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We apply new rock luminescence techniques to a well-constrained scenario of the Beinn Alligin rock avalanche, NW Scotland. We measure accurate erosion rates consistent with independently derived rates and reveal a transient state of erosion over the last ~4000 years in the wet, temperate climate of NW Scotland. This study shows that the new luminescence erosion-meter has huge potential for inferring erosion rates on sub-millennial scales, which is currently impossible with existing techniques.
Barbara Mauz, Loïc Martin, Michael Discher, Chantal Tribolo, Sebastian Kreutzer, Chiara Bahl, Andreas Lang, and Nobert Mercier
Geochronology, 3, 371–381, https://doi.org/10.5194/gchron-3-371-2021, https://doi.org/10.5194/gchron-3-371-2021, 2021
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Luminescence dating requires irradiating the sample in the laboratory. Here, we address some concerns about the reliability of the calibration procedure that have been published recently. We found that the interplay between geometrical parameters such as grain size and aliquot size impacts the calibration value more than previously thought. The results of our study are robust and allow us to recommend an improved calibration procedure in order to enhance the reliability of the calibration value.
Dirk Mittelstraß and Sebastian Kreutzer
Geochronology, 3, 299–319, https://doi.org/10.5194/gchron-3-299-2021, https://doi.org/10.5194/gchron-3-299-2021, 2021
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Our contribution enhances the infrared radiofluorescence dating technique, used to determine the last sunlight exposure of potassium feldspars in a range of about 600 to 600 000 years backwards. We recorded radiofluorescence images of fine sands and processed them with tailored open-source software to obtain ages from single grains. Finally, we tested our new method successfully on two natural sediment samples. Studies in Earth science will benefit from improved age accuracy and new insights.
Guillaume Guérin, Christelle Lahaye, Maryam Heydari, Martin Autzen, Jan-Pieter Buylaert, Pierre Guibert, Mayank Jain, Sebastian Kreutzer, Brice Lebrun, Andrew S. Murray, Kristina J. Thomsen, Petra Urbanova, and Anne Philippe
Geochronology, 3, 229–245, https://doi.org/10.5194/gchron-3-229-2021, https://doi.org/10.5194/gchron-3-229-2021, 2021
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This paper demonstrates how to model optically stimulated luminescence (OSL) and radiocarbon ages in a Bayesian framework, using a dedicated software tool called BayLum. We show the effect of stratigraphic constraints, of modelling the covariance of ages when the same equipment is used for a series of OSL samples, and of including independent ages on a chronological inference. The improvement in chronological resolution is significant.
Daniela Mueller, Frank Preusser, Marius W. Buechi, Lukas Gegg, and Gaudenz Deplazes
Geochronology, 2, 305–323, https://doi.org/10.5194/gchron-2-305-2020, https://doi.org/10.5194/gchron-2-305-2020, 2020
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Luminescence properties of samples from the Rinikerfeld, northern Switzerland, are assessed. Reader-specific low preheat temperatures are invesigated to ensure suitable measurement conditions. While quartz is found to be dominated by stable fast components, signal loss is observed for feldspar and polymineral. In general, the ages of the fading corrected feldspar and the fine-grained polymineral fractions are in agreement with coarse-grained quartz, and ages indicate sedimentation during MIS6.
Galina Faershtein, Naomi Porat, and Ari Matmon
Geochronology, 2, 101–118, https://doi.org/10.5194/gchron-2-101-2020, https://doi.org/10.5194/gchron-2-101-2020, 2020
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Optically stimulated luminescence dates the last exposure of quartz and feldspar minerals to sunlight. We investigated its sub-methods (TT-OSL, VSL, and pIRIR) to date middle and early Pleistocene sediments. Inspection of natural signals of samples can reveal saturated samples that produce only minimum ages. Using these sub-methods, minimum ages of up to the early Pleistocene can be obtained for eastern Mediterranean aeolian sediments of Nilotic origin.
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Short summary
We apply luminescence dating of feldspars to establish a geochronological framework for the sequence of accretionary hillslope deposition at Jojosi, which contains important archaeological artefacts. We test and evaluate four different dose models and their applicability to single-grain and multi-grain data sets containing up to 67 % saturated grains. Our results constrain erosional and depositional processes from 100–700 ka and human occupation of the area in early MIS 5 and late MIS 6.
We apply luminescence dating of feldspars to establish a geochronological framework for the...
