This paper aims to provide an overview concerning the optically stimulated luminescence OSL dating method and its applications for geomorphological research in France. An outline of the general physical principles of luminescence dating is given. A case study of fluvial sands from the lower terrace of the Moselle valley is then presented to describe the range of field and laboratory procedures required for successful luminescence dating. The paper also reviews the place of OSL dating in geomorphological research in France and assesses its potential for further research, by focusing on the diversity of sedimentary environments and topics to which it can be usefully applied. Hence it underlines the increasing importance of the method to geomorphological research, especially by contributing to the development of quantitative geomorphology. They are now largely used to date not only palaeontological or organic remains, but also minerals that characterise detrital clastic sedimentary material. The most common methods applied to minerals are cosmogenic radionuclides, electron spin resonance ESR and luminescence techniques. The latter were first applied to burned minerals from archaeological artefacts [thermoluminescence TL method]. Improvements of this technique led to the development, for more than twenty years, of the optical dating method [commonly referred to as Optically Stimuled Luminescence OSL ] which is now applied to sediments from various origins Wintle,
Luminescence dating is an absolute radiometric method of determining the age of a material since a key event in its history – typically burial (in.
Pleistocene human groups: cultures, evolutions and dynamics in Eurasia. After completing an initial M. Norbert Mercier and Dr. Christelle Lahaye. This research project focuses on the significant questions of the disappearance of Neanderthals from Eurasia, the associated spread of anatomically modern humans across Eurasia, and the extent to which there was contact with Denisovans in Siberia.
As postdoctoral research fellow , I was responsible for the luminescence dating component of the project. Since , I led a research project Oxford John Fell Fund which aims to develop a novel methodology for dating Plio-Pleistocene sediments, in order to provide numerical ages for major fossil and artefact-bearing sites in Africa. My approach is to apply a revolutionary luminescence-based method, I developed during my Ph. D, and known as infrared-radiofluorescence IR-RF to determine the age of sediments i.
In September , I have been awarded a H. Early human evolution in Africa. Early human dispersals into the Americas. Career path After completing an initial M.
Testing Luminescence Dating Methods for Small Samples from Very Young Fluvial Deposits
The OSL optically stimulated luminescence dating method exploits dosimetric properties of grains of minerals naturally occurring in sediments and man-made materials. In archaeology the OSL method is used to date pottery and other heated materials e. When compared with the radiocarbon method it makes possible dating objects containing no organic matter or originating in periods for which the radiocarbon method is less accurate due to the shape or lack of the calibration curve.
bThe Nordic Laboratory for Luminescence Dating, Department of Earth Sciences ments of optically stimulated luminescence (OSL) were results from Oxford.
Rapid development in this field is evident from large number of publications more than in appearing in a variety of journals. The main attraction of OSL is its all-optical technological advantage over the well-established thermoluminescence dosimetry TLD , for not requiring heating of the sample and the ease of associated equipment. In the recent years, optically stimulated luminescence dosimetry OSLD has emerged as a technique with a vast potential and has become favourite of researchers for studying newer parameters and exploring extended applications because of the possibility of adopting variety of stimulation sources, recording of different emission wavelengths in different modes and characterising different materials both naturally occurring and synthesised for the purpose of dosimetry.
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To compare our experiment results with other laboratories by participating in international inter-laboratory comparison tests is an important need to ensure the accuracy of our measurements. However, so far, international comparison tests or measurements on OSL dating are unfortunately organized very limited in number.
The latest inter-laboratory comparison study was conducted between and years by the Nordic Luminescence Laboratory in Denmark.
He obtained his PhD in Luminescence Dating () from the University of Oxford. He is currently an Associate Professor at the Institute of Geophysics, Tehran.
This article describes the principles of optical dating—an umbrella term for a family of related techniques based on the storage of radiation energy in light-sensitive traps in natural minerals—and its application to rock art. Only a few studies have used OSL or IRSL dating to constrain the age of rock paintings and engravings, and these applications can be grouped under two broad headings: dating of associated sediments and dating of rock surfaces.
These studies are briefly reviewed in this chapter, together with some comments on future directions and challenges for OSL and IRSL dating of rock art. Access to the complete content on Oxford Handbooks Online requires a subscription or purchase. Public users are able to search the site and view the abstracts and keywords for each book and chapter without a subscription. Please subscribe or login to access full text content.
OSL Dating in Archaeology
Optically Stimulated Luminescence OSL dating has emerged within the last 20 years as a key Quaternary absolute dating tool, with a wide range of terrestrial and marine applications. Optical dating techniques employ ubiquitous quartz or feldspar grains to directly date the deposition of sedimentary units. As such, the optical dating methods allow the systematic chronological evaluation of Quaternary-age sedimentary sequences. Within the School of Geography and the Environment, the OLD Laboratory provides support particularly for the Landscape Dynamics research cluster, with a specific focus on low latitude environment and climate change, geoarchaeology and geomorphology.
Luminescence dating techniques can be applied to inland sand seas, small dunefields, coastal dune Archaeology and the History of Art. Oxford. University.
Optically stimulated luminescence OSL is one of a class of measurements known as stimulated phenomena. Such phenomena may be stimulated thermally or optically and the reader is referred to works by Aitken and Botter-Jensen and others for more detail. In recent years OSL has become a popular procedure for the determination of environmental radiation doses absorbed by archeological and geological materials in an attempt to date these materials.
The first OSL measurements on quartz and feldspar were made using an argon ion-laser Huntley et al. However, the development of cheaper stimulation systems based first on filtered lamps and then on light- emitting diodes LEDs Spooner, et al. The abstracts in this volume represent presentations from a workshop held in May-June , at the Denver Federal Center, Denver, Colorado, in which OSL methodologies and applications were summarized and integrated to provide a current synthesis of the OSL science being applied throughout North America.
The workshop, sponsored by the U. Participants included thirty-six research scientists and students in geology, archaeology, and physics from the U. The workshop included two keynote speakers: Dr. The workshop encouraged everyone to interact more to develop a broader perspective on the types of research and the problems encountered when reporting OSL ages. These workshops were interspersed with the international meetings on luminescence that were held in Reno, NV, , and Cologne, Germany; An Introduction to Optical Dating.
Oxford University Press, Oxford, p.
The principles of Luminescence Dating
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Oxford University Press, Oxford. pp. Duller, G.A.T., Distinguishing quartz and feldspar in single grain luminescence measurements. Radiation.
Optically-Stimulated Luminescence is a late Quaternary dating technique used to date the last time quartz sediment was exposed to light. As sediment is transported by wind, water, or ice, it is exposed to sunlight and zeroed of any previous luminescence signal. Once this sediment is deposited and subsequently buried, it is removed from light and is exposed to low levels of natural radiation in the surrounding sediment.
Through geologic time, quartz minerals accumulate a luminescence signal as ionizing radiation excites electrons within parent nuclei in the crystal lattice. A certain percent of the freed electrons become trapped in defects or holes in the crystal lattice of the quartz sand grain referred to as luminescent centers and accumulate over time Aitken, In our laboratory, these sediments are exposed to an external stimulus blue-green light and the trapped electrons are released.
The released electrons emit a photon of light upon recombination at a similar site. In order to relate the luminescence given off by the sample to an age, we first need to obtain the dose equivalent to the burial dose. Following the single-aliquot regenerative SAR method of Murray and Wintle , the dose equivalent De is calculated by first measuring the natural luminescence of a sample.
Springer Professional. Back to the search result list. Table of Contents. Hint Swipe to navigate through the chapters of this book Close hint. Abstract Half a century after the publication of the first Thermoluminescence TL ages, the field of Luminescence Dating has reached a level of maturity.
Keywords Luminescence dating TL OSL Archaeology Palaeoanthro- Oxford University Press, Oxford, pp. Aitken MJ, Tite MS, Reid J ().
The impetus behind this study is to understand the sedimentological dynamics of very young fluvial systems in the Amazon River catchment and relate these to land use change and modern analogue studies of tidal rhythmites in the geologic record. Many of these features have an appearance of freshly deposited pristine sand, and these observations and information from anecdotal evidence and LandSat imagery suggest an apparent decadal stability. Signals from medium-sized aliquots 5 mm diameter exhibit very high specific luminescence sensitivity, have excellent dose recovery and recycling, essentially independent of preheat, and show minimal heat transfer even at the highest preheats.
Significant recuperation is observed for samples from two of the study sites and, in these instances, either the acceptance threshold was increased or growth curves were forced through the origin; recuperation is considered most likely to be a measurement artefact given the very small size of natural signals. Despite the use of medium-sized aliquots to ensure the recovery of very dim natural OSL signals, these results demonstrate the potential of OSL for studying very young active fluvial processes in these settings.
An important facet of the development of a geochronological technique is the investigation of potential age range. Much recent work in the luminescence field has focused on maximum achievable ages using high-temperature post-infrared infrared pIRIR signals from feldspars [ 1 , 2 ]. In contrast for quartz optically stimulated luminescence OSL , the more efficient signal resetting coupled with environments where grain reworking is evident make it well suited to assessment of minimum achievable age.
Notable examples are studies of young fluvial deposits [ 3 , 4 , 5 , 6 ] and dunes [ 7 , 8 , 9 , 10 , 11 ]. Regarding the application of OSL dating to fluvial sediments in the Amazon region, a number of studies have used the technique to try to constrain the origin and development of the drainage system, documenting Mid—Late Pleistocene ages [ 12 , 13 , 14 ], and OSL analyses have also been carried out to investigate the Late Pleistocene to Holocene development of fluvial bars [ 15 ].
The impetus behind this work was to investigate the feasibility of optically stimulated luminescence OSL dating of very young fluvial and shoreline landforms in the Amazon River catchment.