Articles | Volume 3, issue 1
https://doi.org/10.5194/gchron-3-299-2021
© Author(s) 2021. 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-3-299-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Spatially resolved infrared radiofluorescence: single-grain K-feldspar dating using CCD imaging
Dirk Mittelstraß
CORRESPONDING AUTHOR
independent researcher: Berthelsdorfer Str. 13, 09599
Freiberg, Germany
Sebastian Kreutzer
CORRESPONDING AUTHOR
Geography & Earth Sciences, Aberystwyth University, Aberystwyth, Wales,
United Kingdom
IRAMAT-CRP2A, UMR 5060, CNRS-Université Bordeaux Montaigne,
Pessac, France
Related authors
No articles found.
Annette Kadereit, Mariana Sontag-González, Sebastian Kreutzer, Marco Colombo, Christoph Schmidt, and Paul R. Hanson
EGUsphere, https://doi.org/10.5194/egusphere-2025-5978, https://doi.org/10.5194/egusphere-2025-5978, 2025
This preprint is open for discussion and under review for Geochronology (GChron).
Short summary
Short summary
Infrared-stimulated luminescence (IRSL) dating of feldspar is an essential tool for dating sediments. Two major challenges of the IRSL signal are its “anomalous” instability potentially leading to age underestimation and its slow bleaching by sunlight which may cause age overestimation. Here we propose a progressively elevated temperature (PET) IRSL single aliquot regenerative (SAR) procedure to isolate a potentially stable IRSL signal from a set of best bleached subsamples.
Sebastian Kreutzer, Loïc Martin, Didier Miallier, and Norbert Mercier
Geochronology, 7, 229–246, https://doi.org/10.5194/gchron-7-229-2025, https://doi.org/10.5194/gchron-7-229-2025, 2025
Short summary
Short summary
Accurate readings on the environmental gamma dose rate are important. Portable gamma-ray detectors, such as those that are 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.
Christoph Schmidt, Théo Halter, Paul R. Hanson, Alexey Ulianov, Benita Putlitz, Georgina E. King, and Sebastian Kreutzer
Geochronology, 6, 665–682, https://doi.org/10.5194/gchron-6-665-2024, https://doi.org/10.5194/gchron-6-665-2024, 2024
Short summary
Short summary
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.
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
Short summary
Short summary
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.
Nora Pfaffner, Annette Kadereit, Volker Karius, Thomas Kolb, Sebastian Kreutzer, and Daniela Sauer
E&G Quaternary Sci. J., 73, 1–22, https://doi.org/10.5194/egqsj-73-1-2024, https://doi.org/10.5194/egqsj-73-1-2024, 2024
Short summary
Short summary
We present results of the Baix loess–palaeosol sequence, SE France. Reconstructed intense soil formation under warm, moist conditions before and into the last ice age and less intense soil formations in warm (temporarily moist) phases during the generally cold, dry ice age were validated with laboratory and dating techniques. This is particularly relevant as Baix is located in the temperate–Mediterranean climate transition zone, a sensitive zone that is susceptible to future climate changes.
Mathieu Bosq, Sebastian Kreutzer, Pascal Bertran, Philippe Lanos, Philippe Dufresne, and Christoph Schmidt
Earth Syst. Sci. Data, 15, 4689–4711, https://doi.org/10.5194/essd-15-4689-2023, https://doi.org/10.5194/essd-15-4689-2023, 2023
Short summary
Short summary
During the last glacial period, cold conditions associated with changes in atmospheric circulation resulted in the deposition of widespread loess. It seems that the phases of loess accumulation were not strictly synchronous. To test this hypothesis, the chronology of loess deposition in different regions of Europe was studied by recalculating 1423 luminescence ages in a database. Our study discusses the link between the main loess sedimentation phases and the maximal advance of glaciers.
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
Short summary
Short summary
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.
Michael Dietze, Sebastian Kreutzer, Margret C. Fuchs, and Sascha Meszner
Geochronology, 4, 323–338, https://doi.org/10.5194/gchron-4-323-2022, https://doi.org/10.5194/gchron-4-323-2022, 2022
Short summary
Short summary
The R package sandbox is a collection of functions that allow the creation, sampling and analysis of fully virtual sediment sections, like having a virtual twin of real-world deposits. This article introduces the concept, features, and workflows required to use sandbox. It shows how a real-world sediment section can be mapped into the model and subsequently addresses a series of theoretical and practical questions, exploiting the flexibility of the model framework.
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
Short summary
Short summary
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, 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
Short summary
Short summary
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.
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
Short summary
Short summary
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.
Cited articles
Allaire, J. J., Xie, Y., R Foundation, Wickham, H., Journal of Statistical Software,
Vaidyanathan, R., Association for Computing Machinery, Boettiger, C., Elsevier, Broman, K., Mueller, K.,
Quast, B., Pruim, R., Marwick, B., Wickham, C., Keyes, O., Yu, M., Emaasit, D., Onkelinx, T., Gasparini, A., Desautels, M.-A., Leutnant, D., MDPI, Taylor and
Francis, Öğreden, O., Hance, D., Nüst, D., Uvesten, P., Campitelli, E., Muschelli, J.,
Hayes, A., Kamvar, Z. N., Ross, N., Cannoodt, R., Luguern, D., Kaplan, D. M.,
Kreutzer, S., Wang, S., Hesselberth, J., and Dervieux, C.: rticles:
Article Formats for R Markdown,
R package version 0.18.3, available at: https://CRAN.R-project.org/package=rticles (last access: 28 March 2021), GitHub,
2021. a
Baril, M. R.: CCD imaging of the infra-red stimulated luminescence of
feldspars, Radiat. Meas., 38, 81–86,
https://doi.org/10.1016/j.radmeas.2003.08.005, 2004. a
Bortolot, V. J.: A new modular high capacity OSL reader system, Radiat.
Meas., 32, 751–757, https://doi.org/10.1016/S1350-4487(00)00038-X, 2000. a
Bøtter-Jensen, L., Bulur, E., Duller, G. A. T., and Murray, A. S.: Advances in
luminescence instrument systems, Radiat. Meas., 32, 523–528,
https://doi.org/10.1016/S1350-4487(00)00039-1, 2000. a
Bøtter-Jensen, L., Andersen, C. E., Duller, G. A. T., and Murray, A. S.:
Developments in radiation, stimulation and oberservation facilities in
luminescence measurements, Radiat. Meas., 37, 535–541,
https://doi.org/10.1016/S1350-4487(03)00020-9, 2003. a
Bouab, N.: Application Des Methodes de Datation Par Luminescence Optique
À L'évolution Des Environnements Désertiques – Sahara
Occidental (Maroc) Et Iles Canaries Orientales (Espagne) , Ph.D. thesis,
Université du Québec à Montréal, Canada, available at: http://constellation.uqac.ca/868/1/13721974.pdf (last access: 28 March 2021), 2005. a
Buylaert, J. P., Újvári, G., Murray, A. S., Smedley, R. K., and Kook, M.: On
the relationship between K concentration, grain size and dose in feldspar,
Radiat. Meas., 120, 181–187, https://doi.org/10.1016/j.radmeas.2018.06.003,
2018. a
Chauhan, N., Adhyaru, P., Vaghela, H., and Singhvi, A. K.: EMCCD based
luminescence imaging system for spatially resolved geo-chronometric and
radiation dosimetric applications, J. Instrum., 9,
P11016, https://doi.org/10.1088/1748-0221/9/11/P11016, 2014. a
Clark-Balzan, L. and Schwenninger, J.-L.: First steps toward spatially resolved
OSL dating with electron multiplying charge-coupled devices (EMCCDs):
System design and image analysis, Radiat. Meas., 47, 797–802,
https://doi.org/10.1016/j.radmeas.2012.01.018, 2012. a
Cunningham, A. and Clark-Balzan, L.: Overcoming crosstalk in luminescence
images of mineral grains, Radiat. Meas., 106, 498–505,
https://doi.org/10.1016/j.radmeas.2017.06.004, 2017. a, b, c
Dietze, M., Kreutzer, S., Burow, C., Fuchs, M. C., Fischer, M., and Schmidt,
C.: The abanico plot: visualising chronometric data with individual standard
errors, Quat. Geochronol., 31, 12–18,
https://doi.org/10.1016/j.quageo.2015.09.003, 2016. a, b
Duller, G. A. T. and Roberts, H. M.: Seeing Snails in a New Light,
Elements, 14, 39–43, https://doi.org/10.2138/gselements.14.1.39, 2018. a
Duller, G. A. T., Bøtter-Jensen, L., and Markey, B. G.: A luminescence imaging
system based on a CCD camera, Radiat. Meas., 27, 91–99,
https://doi.org/10.1016/S1350-4487(96)00120-5, 1997. a
Duller, G. A. T., Kook, M., Stirling, R. J., Roberts, H. M., and Murray, A. S.:
Spatially-resolved thermoluminescence from snail opercula using an EMCCD,
Radiat. Meas., 81, 157–162, https://doi.org/10.1016/j.radmeas.2015.01.014,
2015. a
Duller, G. A. T., Gunn, M., and Roberts, H. M.: Single grain infrared
photoluminescence (IRPL) measurements of feldspars for dating, Radiat.
Meas., 133, 106313, https://doi.org/10.1016/j.radmeas.2020.106313, 2020. a
Dütsch, C. and Krbetschek, M. R.: New methods for a better internal
40K dose rate determination, Radiat. Meas., 27, 377–381,
https://doi.org/10.1016/S1350-4487(96)00153-9, 1997. a
Erfurt, G. and Krbetschek, M. R.: Studies on the physics of the infrared
radioluminescence of potassium feldspar and on the methodology of its
application to sediment dating, Radiat. Meas., 37, 505–510,
https://doi.org/10.1016/S1350-4487(03)00058-1, 2003b. a
Fitzsimmons, K. E.: Applications in Aeolian Environments, in: Handbook of
Luminescence Dating, edited by: Bateman, M. D., Whittles
Publishing, Dunbeath, Scotland, UK, 110–152, 2019. a
Frouin, M., Huot, S., Mercier, N., Lahaye, C., and Lamothe, M.: The issue of
laboratory bleaching in the infrared-radiofluorescence dating method,
Radiat. Meas., 81, 212–217, https://doi.org/10.1016/j.radmeas.2014.12.012,
2015. a, b
Frouin, M., Huot, S., Kreutzer, S., Lahaye, C., Lamothe, M., Philippe, A., and
Mercier, N.: An improved radiofluorescence single-aliquot regenerative dose
protocol for K-feldspars, Quat. Geochronol., 38, 13–24,
https://doi.org/10.1016/j.quageo.2016.11.004, 2017. a, b, c, d, e, f, g, h, i, j, k, l, m
Galbraith, R. F. and Roberts, R. G.: Statistical aspects of equivalent dose
and error calculation and display in OSL dating: An overview and some
recommendations, Quat. Geochronol., 11, 1–27,
https://doi.org/10.1016/j.quageo.2012.04.020, 2012. a
Greilich, S., Glasmacher, U. A., and Wagner, G. A.: Spatially resolved
detection of luminescence: a unique tool for archaeochronometry,
Naturwissenschaften, 89, 371–375, https://doi.org/10.1007/s00114-002-0341-z, 2002. a
Greilich, S., Glasmacher, U. A., and Wagner, G. A.: Optical dating of granitic
stone surfaces, Archaeometry, 47, 645–665,
https://doi.org/10.1111/j.1475-4754.2005.00224.x, 2005. a
Greilich, S., Harney, H.-L., Woda, C., and Wagner, G. A.: AgesGalore – A
software program for evaluating spatially resolved luminescence data,
Radiat. Meas., 41, 726–735, https://doi.org/10.1016/j.radmeas.2005.12.007,
2006. a
Greilich, S., Gribenski, N., Mittelstraß, D., Dornich, K., Huot, S., and
Preusser, F.: Single-grain dose-distribution measurements by optically
stimulated luminescence using an integrated EMCCD-based system, Quat.
Geochronol., 29, 70–79, https://doi.org/10.1016/j.quageo.2015.06.009, 2015. a, b, c, d
Guérin, G., Christophe, C., Philippe, A., Murray, A. S., Thomsen, K. J.,
Tribolo, C., Urbanova, P., Jain, M., Guibert, P., Mercier, N., Kreutzer, S.,
and Lahaye, C.: Absorbed dose, equivalent dose, measured dose rates, and
implications for OSL age estimates: Introducing the Average Dose Model,
Quat. Geochronol., 41, 163–173, https://doi.org/10.1016/j.quageo.2017.04.002,
2017. a
Gusarov, A., Doyle, D., Glebov, L., and Berghmans, F.: Comparison of
radiation-induced transmission degradation of borosilicate crown optical
glass from four different manufacturers, in: Optics & Photonics 2005,
edited by: Taylor, E. W., SPIE, 5897, 58970I1-8, https://doi.org/10.1117/12.619199,
2005. a
Huntley, D. J. and Baril, M. R.: The K content of the K-feldspars being
measured in optical dating or in the thermoluminescence dating, Ancient TL,
15, 11–13,
available at: http://ancienttl.org/ATL_15-1_1997/ATL_15-1_Huntley_p11-13.pdf (last access: 28 March 2021),
1997. a
Huntley, D. J. and Kirkley, J. J.: The use of an image intensifier to study the
TL intensity variability of individual grains, 3, 1–4, available at: http://ancienttl.org/ATL_03-2_1985/ATL_03-2_Huntley_p1-4.pdf (last
access: 4 May 2021), 1985. a
Huntley, D. J., Godfrey-Smith, D. I., and Thewalt, M. L. W.: Optical dating of
sediments, Nature, 313, 105–107, https://doi.org/10.1038/313105a0, 1985. a
Janesick, J. R.: Scientific charge-coupled devices, SPIE Press Book, SPIE Press, Bellingham, United states, 907 pp.,
https://doi.org/10.1117/3.374903, 2001. a, b, c, d
Kook, M., Lapp, T., Murray, A., Thomsen, K., and Jain, M.: A luminescence
imaging system for the routine measurement of single-grain OSL dose
distributions, Radiat. Meas., 81, 171–177,
https://doi.org/10.1016/j.radmeas.2015.02.010, 2015. a
Krbetschek, M. R., Trautmann, T., Dietrich, A., and Stolz, W.:
Radioluminescence dating of sediments: methodological aspects, Radiat.
Meas., 32, 493–498, https://doi.org/10.1016/S1350-4487(00)00122-0, 2000. a, b
Kreutzer, S. and Mittelstrass, D.: Spatially Resolved Infrared
Radiofluorescence (SR IR-RF) Image Data, Zenodo [data set], https://doi.org/10.5281/zenodo.4395968,
2020b. a, b
Kreutzer, S., Schmidt, C., Fuchs, M. C., Dietze, M., Fischer, M., and Fuchs,
M.: Introducing an R package for luminescence dating analysis, Ancient TL,
30, 1–8,
available at: http://ancienttl.org/ATL_30-1_2012/ATL_30-1_Kreutzer_p1-8.pdf (last access: 28 March 2021),
2012. a
Kreutzer, S., Murari, M. K., Frouin, M., Fuchs, M., and Mercier, N.: Always
remain suspicious: a case study on tracking down a technical artefact while
measuring IR-RF, Ancient TL, 35, 20–30,
available at: http://ancienttl.org/ATL_35-1_2017/ATL_35-1_Kreutzer_p20-30.pdf (last access: 28 March 2021),
2017. a, b, c
Kreutzer, S., Duval, M., Bartz, M., Bertran, P., Bosq, M., Eynaud, F., Verdin,
F., and Mercier, N.: Deciphering long-term coastal dynamics using IR-RF and
ESR dating: A case study from Médoc, south-West France, Quat.
Geochronol., 48, 108–120, https://doi.org/10.1016/j.quageo.2018.09.005, 2018. a, b, c, d, e, f, g, h, i, j, k
Kreutzer, S., Burow, C., Dietze, M., Fuchs, M. C., Schmidt, C., Fischer, M.,
Friedrich, J., Riedesel, S., Autzen, M., and Mittelstrass, D.: Luminescence:
Comprehensive Luminescence Dating Data Analysis, R package
version 0.9.9,
available at: https://CRAN.R-project.org/package=Luminescence (last access: 28 March 2021), 2020. a
Kumar, R., Martin, L. I. D. J., Poelman, D., Vandenberghe, D., De Grave, J.,
Kook, M., and Jain, M.: Site-selective mapping of metastable states using
electron-beam induced luminescence microscopy, Scientific Reports, 10,
15650, https://doi.org/10.1038/s41598-020-72334-7, 2020. a, b
Liritzis, Y. and Galloway, R. B.: Bremsstrahlung from a shielded beta
irradiator, J. Radioanal. Nucl. Ch., 146, 333–345,
https://doi.org/10.1007/BF02164236, 1990. a
Maraba, D. and Bulur, E.: Design and construction of an automated OSL reader
with open source software and hardware, Radiat. Meas., 106, 632–637,
https://doi.org/10.1016/j.radmeas.2017.04.011, 2017. a
Mauz, B., Martin, L., Discher, M., Tribolo, C., Kreutzer, S., Bahl, C., Lang, A., and Mercier, N.: Technical note: On the reliability of laboratory beta-source calibration for luminescence dating, Geochronology Discuss. [preprint], https://doi.org/10.5194/gchron-2020-36, in review, 2020. a
Mittelstraß, D. and Kreutzer, S.: ImageJ macro for spatially resolved infrared
radiofluorescence (SR-RF) (Version v0.1.0), Zenodo, https://doi.org/10.5281/zenodo.4745491, 2021. a
Murari, K. M., Kreutzer, S., King, G., Frouin, M., Tsukamoto, S., Schmidt, C.,
Lauer, T., Klasen, N., Richter, D., Friedrich, J., Mercier, N., and Fuchs,
M.: Infrared Radiofluorescence (IR-RF), Quat. Geochronol., 64,
101155, 10.1016/j.quageo.2021.101155, 2021. a
Murari, M. K., Kreutzer, S., and Fuchs, M.: Further investigations on
IR-RF: Dose recovery and correction, Radiat. Meas., 120,
110–119, https://doi.org/10.1016/j.radmeas.2018.04.017, 2018. a, b, c, d
R Core Team: R: A Language and Environment for Statistical
Computing, Vienna, Austria, available at: https://r-project.org (last access: 28 March 2021), 2020. a
Rhodius, C., Kadereit, A., Siegel, U., Schmidt, K., Eichmann, R., and Khalil,
L. A.: Constraining the time of construction of the irrigation system of
Tell Hujayrat al-Ghuzlan near Aqaba, Jordan, using high-resolution
optically stimulated luminescence (HR-OSL) dating, Archaeol.
Anthrop. Sci., 9, 345–370, https://doi.org/10.1007/s12520-015-0284-x, 2015. a
Richter, D., Richter, A., and Dornich, K.: Lexsyg smart – a luminescence
detection system for dosimetry, material research and dating application,
Geochronometria, 42, 202–209, https://doi.org/10.1515/geochr-2015-0022, 2015. a
Schneider, C. A., Rasband, W. S., and Eliceiri, K. W.: NIH Image to
ImageJ: 25 years of image analysis, Nat. Methods, 9, 671–675,
https://doi.org/10.1038/nmeth.2089, 2012. a
Spooner, N. A.: A photon-counting imaging system (PCIS) for luminescence
applications, Radiat. Meas., 32, 513–521,
https://doi.org/10.1016/S1350-4487(00)00056-1, 2000. a
Thévenaz, P., Ruttimann, U. E., and Unser, M.: A pyramid approach to subpixel
registration based on intensity, IEEE transactions on image processing: a
publication of the IEEE Signal Processing Society, 7, 27–41,
https://doi.org/10.1109/83.650848, 1998. a
Trautmann, T., Krbetschek, M. R., Dietrich, A., and Stolz, W.: Investigations
of feldspar radioluminescence: potential for a new dating technique,
Radiat. Meas., 29, 421–425, https://doi.org/10.1016/S1350-4487(98)00012-2,
1998. a
Trautmann, T., Krbetschek, M., Dietrich, A., and Stolz, W.: Feldspar
radioluminescence: a new dating method and its physical background, J.
Lumin., 85, 45–58, https://doi.org/10.1016/S0022-2313(99)00152-0, 1999. a, b, c
Trautmann, T., Krbetschek, M. R., and Stolz, W.: A systematic study of the
radioluminescence properties of single feldspar grains, Radiat.
Meas., 32, 685–690, https://doi.org/10.1016/S1350-4487(00)00077-9, 2000. a, b, c
Velleman, P. F.: Definition and Comparison of Robust Nonlinear Data
Smoothing Algorithms, J. Am. Stat. Assoc.,
75, 609–615, https://doi.org/10.2307/2287657, 1980. a, b, c
Wagner, G. A., Krbetschek, M. R., Degering, D., Bahain, J. J., Shao, Q.,
Falguères, C., Voinchet, P., Dolo, J. M., Garcia, T., and Rightmire, G. P.:
Radiometric dating of the type-site for Homo heidelbergensis at Mauer,
Germany, P. Natl. Acad. Sci. USA, 107,
19726–19730, https://doi.org/10.1073/pnas.1012722107, 2010. a
Short summary
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.
Our contribution enhances the infrared radiofluorescence dating technique, used to determine the...