Infrared Radiofluorescence (IR-RF) of K-Feldspar: An Interlaboratory Comparison
In: ISSN: 1733-8387, 2021
academicJournal
Zugriff:
International audience ; Abstract Infrared Radiofluorescence (IR-RF) is a relatively new method for dosimetric dating of the depositional timing of sediments. This contribution presents an interlaboratory comparison of IR-RF measurements of sedimentary feldspar from eight laboratories. A comparison of the variability of instrumental background, bleaching, saturation, and initial rise behaviour of the IR-RF signal was carried out. Two endmember samples, a naturally bleached modern dune sand sample with a zero dose and a naturally saturated sample from a Triassic sandstone (~250 Ma), were used for this interlaboratory comparison. The major findings of this study are that (1) the observed IR-RF signal keeps decreasing beyond 4000 Gy, (2) the saturated sample gives an apparent palaeodose of 1265 ± 329 Gy and (3) in most cases, the natural IR-RF signal of the modern analogue sample (resulting from natural bleaching) is higher than the signal from laboratory-induced bleaching of 6 h, using a solar simulator (SLS). In other words, the laboratory sample bleaching was unable to achieve the level of natural bleaching. The results of the investigations are discussed in detail, along with possible explanations.
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Infrared Radiofluorescence (IR-RF) of K-Feldspar: An Interlaboratory Comparison
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Autor/in / Beteiligte Person: | Murari, Madhav ; Kreutzer, Sebastian ; Frouin, Marine ; Friedrich, Johannes ; Lauer, Tobias ; Klasen, Nicole ; Schmidt, Christoph ; Tsukamoto, Sumiko ; Richter, Daniel ; Mercier, Norbert ; Fuchs, Markus ; Geochronology Group, Inter-University Accelerator Centre, New Delhi, India ; Justus-Liebig-Universität Gießen = Justus Liebig University (JLU) ; Geography & Earth Sciences, Aberystwyth University, United Kingdom ; University, Aberystwyth ; IRAMAT-Centre de recherche en physique appliquée à l’archéologie (IRAMAT-CRP2A) ; Institut de Recherches sur les Archéomatériaux (IRAMAT) ; Université de Technologie de Belfort-Montbeliard (UTBM)-Université d'Orléans (UO)-Université Bordeaux Montaigne (UBM)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Belfort-Montbeliard (UTBM)-Université d'Orléans (UO)-Université Bordeaux Montaigne (UBM)-Centre National de la Recherche Scientifique (CNRS) ; Department of Geosciences, Stony Brook University, Stony Brook, NY, United States ; Research Laboratory for Archaeology and the History of Art Oxford ; School of Archaeology Oxford ; University of Oxford-University of Oxford ; Chair of Geomorphology, University of Bayreuth ; Bayreuth, Universität ; Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology ; Bundesamt für Strahlenschutz - Federal Office for Radiation Protection (BfS) ; Université de Lausanne = University of Lausanne (UNIL) ; Leibniz Institute for Applied Geophysics (LIAG) ; Association, Leibniz ; ANR-10-LABX-0052,LaScArBx,Using the world in ancient societies : processes and forms of appropriation of space in Long Time(2010) |
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Zeitschrift: | ISSN: 1733-8387, 2021 |
Veröffentlichung: | HAL CCSD ; Sciendo, 2021 |
Medientyp: | academicJournal |
DOI: | 10.2478/geochr-2021-0007 |
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