Infrared Radiofluorescence (IR-RF) of K-Feldspar: An Interlaboratory Comparison

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Serval ID
serval:BIB_8030B950E883
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Infrared Radiofluorescence (IR-RF) of K-Feldspar: An Interlaboratory Comparison
Journal
Geochronometria
Author(s)
Murari Madhav K., Kreutzer Sebastian, Frouin Marine, Friedrich Johannes, Lauer Tobias, Klasen Nicole, Schmidt Christoph, Tsukamoto Sumiko, Richter Daniel, Mercier Norbert, Fuchs Markus
ISSN
1897-1695
Publication state
Published
Issued date
01/01/2021
Peer-reviewed
Oui
Volume
48
Number
1
Pages
105-120
Language
english
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.
Keywords
Earth and Planetary Sciences (miscellaneous)
Web of science
Open Access
Yes
Create date
03/01/2022 14:13
Last modification date
07/01/2022 8:10
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