Jain Mayank, Murray A. Optically stimulated luminescence dating: how significant is incomplete light exposure in fluvial environments? In: Quaternaire , vol. Fluvial Archives Group. Clermond-Ferrant Optically stimulated luminescence OSL dating of fluvial sediments is widely used in the interpretation of fluvial response to various allogenic forcing mechanisms during the last glacial-mterglacial cycle.
Optically Stimulated Luminescence
Chronology of plaggic deposits: palynology, radiocarbon and optically stimulated luminescence radiocarbon and optically stimulated luminescence dating of the Posteles (NE-Netherlands). Catena In fluvial settings, where bleaching.
Widoczny [Schowaj] Abstrakt. Aitken MJ, An Introduction to Optical Dating. Oxford University Press: Oxford. Alexanderson H, Residual OSL signals from modern Greenlandic river sediments. Geochronometria 1—9.
Optically stimulated luminescence
However, the geological history of its fluvial plain is poorly understood due the lack of geochronological data. Most of the studies are focused in the low and middle reaches, whereas the region upstream of the Porto Primavera dam is an almost unknown area in terms of geomorphic evolution. In order to achieve this goal, we used an integrated approach including remote sensing data, geomorphology, sedimentology, geochronology and bathymetric profiles.
The geomorphological units were correlated with previous studies downstream of the studied area and their sedimentary characteristics and depositional ages suggest that their genesis is linked to changes in climatic and hydrological conditions during the Late Quaternary. Unit 2 is a compartment with unique morphological characteristics, therefore not correlated with units presented in previous works.
Those based on Optically Stimulated Luminescence (OSL) on quartz or Optically stimulated luminescence dating of fluvial deposits: a review.
Luminescence dating is a technique used to date Quaternary sediments and for determining when ancient materials such as pottery, ceramics, bricks or tiles were last heated. The technique can be applied to material from about to several hundred thousand years old. It is primarily a research facility for the School and for collaborators in New Zealand.
One room serves as preparation laboratory, where all incoming samples are unpacked and chemically treated to purify the sample and extract the desired minerals in the right grain size. Please contact Ningsheng Wang MSc. We use optically stimulated luminescence OSL to date aeolian, fluvial, lacustrine and shallow water marine sediments, as well as most quartz or feldspar-bearing objects, which have seen sunlight or intense heat during deposition.
These sediments can be used to study ancient earthquakes, tsunamis, flooding and volcanic eruptions, as well as climate change, glaciation and tectonic uplift.
Landscape dynamics revealed by luminescence signals of feldspars from fluvial terraces
Research article 09 Aug Correspondence : Elizabeth L. Chamberlain elizabeth.
alluvial fan sediments, e.g. radiocarbon, 40Ar/39Ar, uranium series, surface exposure, and optically stimulated lumines- cence (OSL) dating.
In the last few decades optically stimulated luminescence OSL dating has become an important tool in geochronological studies. The great advantage of the method, i. This can result in a scattered distribution of equivalent doses D E , leading to incorrect estimation of the depositional age. Thoroughly tested protocols as well as good data analysis with adequate statistical methods are important to overcome this problem.
In this study, samples from young fluvial sand and flood plain deposits from the Elbe River in northern Germany were investigated to compare its depositional ages from different age models with well-known historical dates. The paleodose D P was calculated from the DE data set using different approaches. Results were compared with the development of the Elbe River, which is well-documented by historical records and maps covering the last 1, years. Depending on the statistical approach it can be demonstrated that depositional ages significantly differ from the most likely depositional age.
For the investigated coarse grain quartz samples all ages calculated from the MAM-3 UL , including their uncertainties, are within the historical documented age. Results of the polymineral fine grain samples are overestimating the historically documented depositional age, indicating undetectable incomplete bleaching.
Optically Stimulated Luminescence
Well constrained numerical ages of alluvial fan sediments are key to understanding the chronology of alluvial episodes and tectonic activity at the front of the Andean Precordillera. We tested the application of radiocarbon and optically stimulated luminescence OSL dating in the distal part of an alluvial fan five kilometers north of Mendoza. Owing to a feldspar contamination in all samples, an infrared stimulation was inserted before each OSL measurement, which reduced the feldspar OSL signal successfully.
By using the minimum age model we obtained stratigraphically consistent burial ages of alluvial deposits in a depth profile. Three plant remnants used for radiocarbon dating from the same layer, however, yielded ages younger than years, which are interpreted to underestimate the depositional age. Underneath the debris flow, a major unconformity cuts a series of distal alluvial fan sediments with interstratified floodplain deposits, which are composed of sandy and calciterich silt layers, respectively.
“OSL chronology for alluvial fan deposition in the Lost River Range, Idaho,”, 04/01//31/, , “New World Luminescence Dating and Dosimetry.
The USU luminescence geochronology lab houses a new optically stimulated luminescence OSL reader capable of single grain measurements. The instrument was acquired with funds from a charitable donation and the lab is now fully operational for dating the “burial” age or date of last exposure to sunlight of minerals, most commonly quartz sands. Research applications that rely on the OSL technique include dating of river and beach deposits, landslides and fired pottery, especially where no contemporary organic materials are available or where the burial ages exceed the radiocarbon dating maximum of ca.
This technical position will advance the goals of the lab which include expanding applications of OSL for studies in geomorphology, geohazards, and geoarchaeology, and to support student training and research. Some full text articles may not yet be available without a charge during the embargo administrative interval. Some links on this page may take you to non-federal websites.
Their policies may differ from this site. Rittenour, TM.
Luminescence dating facility
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.
In recent years, OSL (Optically Stimulated Luminescence) dating of fluvial deposits has gained much attention (e.g., Theodorakopoulou et al., , Zacharias et.
Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. DOI: Rittenour Published Geology Boreas. Fluvial deposits and landforms are important archives of river response to climate, tectonics and base level change and are commonly associated with archaeological sites. Unlike radiocarbon dating, the target material for optically stimulated luminescence OSL dating sands and silts is nearly ubiquitous in fluvial deposits and the age range for OSL spans the last glacial—interglacial cycle, a time period of interest to many Quaternary scientists.
View via Publisher. Save to Library. Create Alert. Launch Research Feed. Share This Paper. Geoff A.
Publications Repository – Helmholtz-Zentrum Dresden-Rossendorf
Optically stimulated luminescence and isothermal thermoluminescence dating of high sensitivity and well bleached quartz from Brazilian sediments: from Late Holocene to beyond the Quaternary?. ISSN The development of optically stimulated luminescence OSL dating of sediments has led to considerable advance in the geochronology of the Quaternary. OSL dating is a well established technique to determine sediment burial ages from tens of years to few hundred thousand years. Recent studies have shown that Quaternary sediments of Brazil are dominated by quartz grains with high luminescence sensitivity, allowing the determination of precise and reliable OSL burial ages.
We discuss the OSL data and ages of sediments from carbonate and terrigenous distributary and tributary systems fluvial depositional contexts in Brazil.
The Rhine-Meuse system in a new light: optically stimulated luminescence dating and its application to fluvial deposits. Front Cover. Jakob Wallinga. The Royal.
Luminescence dating, particularly using optically stimulated luminescence OSL , is revolutionizing Quaternary and archaeological science because it allows dating of sediments and artifacts that perhaps 10 years ago could not be dated. The lab has produced more than OSL ages from years to , years for aeolian, fluvial, lacustrine, and marine sediments, as well as pottery, artifacts and secondary carbonate.
Chronologies have been developed for archaeological sites in Botswana and the U. As the OSL of a sediment is quickly lost when exposed to sunlight tens of seconds many sediments are bleached lack an OSL signal when deposited and buried. After deposition these sediments accumulate luminescence which can be measured allowing the age of burial to be determined. There is now convincing evidence that many glacial, fluvial, aeolian, and even shallow marine sediments can be dated by OSL techniques.
The upper limit of age by OSL is largely determined by the annual dose on the sediment which is related to it’s content of uranium, thorium and potassium. Low levels of radioactive isotopes in the sediment lead to very slow saturation of quartz and feldspar grains by released electrons and so ages in excess of ka may be possible. Your gift is important to us and helps support critical opportunities for students and faculty alike, including lectures, travel support, and any number of educational events that augment the classroom experience.
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8. Luminescence Dating in Fluvial Settings: Overcoming the Challenge of Partial Bleaching
An alternative to as a number of. Riso national geophysical laboratory was. Nordic laboratory was. Comparing different post-ir irsl source and for optical dating of external energy stimulation, gansu province, sample. The luminescence osl source and feldspars was first terrestrial clastic sediment to.
Optically Stimulated Luminescence (OSL) dating relies on the premise that the fluvial sediments are in general partially and heterogeneously bleached at the.
Kenworthy , Boise State University T. Rittenour , Utah State University J. Sutfin , Boise State University W. Sharp , Berkeley Geochronology Center. Optically stimulated luminescence OSL dating is increasingly used to estimate the age of fluvial deposits. Application of OSL dating to deposits lacking such layers remains a significant challenge.
Deposits are typically pebble to cobble sheetflood gravels with a sandy matrix but thin to absent sand lenses. As a result, the majority of samples for this project were collected by excavating matrix material from gravelly deposits under light-safe tarps or at night. To examine the contributions of different grain-size fractions to calculated dose-rates, multiple grain-size fractions were analyzed using ICP—MS, high resolution gamma spectrometry and XRF.
Dose rates from bulk sediment samples were 0.