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Topic: Optically stimulated luminescence dating

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Radiometric dating Other types of radiometric dating include rubidium-strontium, samarium-neodymium, potassium-argon, argon-argon, uranium-thorium, optically stimulated luminescence dating and uranium-lead. Radiometric dating is based on forms of radioactive decay in which the atomic nucleus emits a neutron or alpha particle and becomes a different element or isotope. Radiometric dating is the determination of the date at which materials were formed by analyzing the decay of radioactive isotopes that were incorporated into the material when it was created and which presumably have not diffused out. www.sciencedaily.com /encyclopedia/radiometric_dating   (715 words)

Selected Bibliography--Dating Methods for the Quaternary Hoffower, H., 2002, Application of optically stimulated luminescence dating techniques to modern and Pleistocene glacio-fluvial deposits: Nebraska Academy of Sciences Program and Proceedings, n.112, p.53. Aitken, M.J., 1997, Luminescence Dating, in, Taylor, R.E., and Aitken, M.J., eds., Chronometric dating in archaeology. Friedman, I., Trembour, F.W., and Hughes, R.E., 1997, Obsidian Hydration Dating, in, Taylor, R.E., and Aitken, M.J., eds., Chronometric dating in archaeology. www.library.uiuc.edu /gex/bibs/datingmethods.html   (2150 words)

U.W.A. - Institute of Geography & Earth Sciences Wallinga, J and Duller, G A T, The effect of optical absorption on the infrared stimulated luminescence age obtained on coarse-grain feldspar. (2005) Optical dating of a Fimic Anthrosol in the southern Netherlands. Roberts, H.M, and Duller, G A T, (2004) Standardised growth curves for optical dating of sediment using multiple-grain aliquots. www.aber.ac.uk /iges/staff/dullergeoff.shtml   (1225 words)

Quartz Hill Dating Testing optically stimulated luminescence dating of sand-sized quartz and feldspar from fluvial deposits... There is an extensive body of Jewish literature dating from about 400 BC through about 200 BC that is remarkable and... Israelites invaded Canaan (a scenario dependant upon an early dating for the Exodus, which is not widely assumed likely... www.adatingagency.co.uk /personals2/datingindex6444.html   (546 words)

Earth and Environmental Sciences -- Refereed Publications Wallinga, J., Murray, A.S., Duller, G.A.T. and Törnqvist, T.E. Testing optically stimulated luminescence dating of sand-sized quartz and feldspar from fluvial deposits. Berger, G.W. and Doran, P.T. Luminescence zeroing tests in Lake Hoare, Taylor Valley, Antarctica. Resolving orthoclase dissolution processes with atomic force microscopy and x-ray reflectivity. www.uic.edu /depts/geos/publications/pub2001.html   (813 words)

Luminescence Laboratory, Department of Earth&Environmental Sciences, UIC On these pages you will find background information about optically stimulated luminescence dating, sedimentologic context and field sampling procedures, research dating services offered by the LDRL and other useful information for the Quaternary sciences and geochronology. Our focus is the judicious application of luminescence dating either independently or in concert with other dating methods to better understand Quaternary tectonic, climate, environmental, and cultural changes. This sand sea is a current focus of Quaternary and luminescence dating research. www.uic.edu /labs/ldrl   (152 words)

Introduction to Aberystwyth Luminescence Research Laboratory Luminescence dating is a Quaternary dating method used to determine the age of a sample. The luminescence dating laboratory in Aberystwyth is part of the Institute of Geography and Earth Sciences in the However, since 1979 the method has also been applied to dating geological sediments, and this is the application that has been worked upon most extensively in the Aberystwyth luminescence laboratory. www.aber.ac.uk /~qecwww/luminescence/aberlum.htm   (277 words)

joel Optically stimulated luminescence dating of Late Quaternary glaciogenic sediments in the Upper Hunza valley: Validating the timing of glaciation and assessing dating methods. Thermoluminescence (TL) and Optically Stimulated Luminescence (OSL) of feldspar and quartz Luminescence dating of anthropogenically reset canal sediments from Angkor Borei, Mekong Delta, Cambodia. www.st-andrews.ac.uk /~www_sgg/html/spencerj.htm   (448 words)

Luminescence Laboratory, Department of Earth & Environmental Sciences, UIC A key advantage of OSL dating is that the luminescence of quartz and feldspar grains is reduced to a low definable level after a few minutes of sunlight exposures versus hours for the corresponding thermoluminescence response. OSL dating uses light of a particular wavelength or range of wavelengths, usually either blue, green or infrared light, releasing rapidly the most light sensitive trapped electrons from the crystal lattice. OSL has emerged in the past decade as valuable Quaternary dating method for a variety of eolian, fluvial, marine and colluvial sediments. www.uic.edu /labs/ldrl/osl.html   (368 words)

Untitled Document While Optically Stimulated Luminescence Dating (OSL) is a well established and accurate dating technique for eolian and fluvial sediments, applications of OSL to glacio-fluvial deposits have remained troublesome. To investigate the effect of partial bleaching on luminescence dating and to gain an overall understanding of luminescence characteristics in glacio-fluvial sediments, modern (0-100a) West Greenland outwash plains were sampled. Overestimated luminescence ages of glacio-fluvial sediments have been attributed to partial bleaching of sediment in transport due to the attenuation of solar radiation through high suspended sediment concentrations throughout the water column. zephyr.unl.edu /OSL/Greenland.htm   (240 words)

The Optically ? Thermally Stimulated Phenomena Lab Techniques in luminescence dating which are of interest include OSL and TL single aliqout and single grain procedures on quartz and feldspars. We have a Jobin-Yvon spectrofluormeter for TL, OSL and photoluminescence spectral measurements. Applications of interest include the dating of eolian and fluvial Holocene sand dunes in central Oklahoma, and the potential for modification of these methods for dating sediments trapped within ice cores. physics.okstate.edu /mckeever/lab/optical.htm   (757 words)

SUERC Stimulation of the system, by heat in the case of thermoluminescence (TL), or by light in the case of photo-stimulated luminescence (PSL), or optically stimulated luminescence (OSL). Luminescence dating is based on quantifying both the radiation dose received by a sample since its zeroing event, and the dose rate which it has experienced during the accumulation period. Luminescence dating can be applied to the age range from present to approximately 500,000 years, thus spanning critical time-scales for human development and quaternary landscape formation. www.gla.ac.uk /centres/surrc/luminescence/dating.html   (865 words)

Optically stimulated luminescence - Wikipedia, the free encyclopedia In physics Optically stimulated luminescence or (OSL) is a method for measuring doses from ionizing radiation (commonly known as radioactive radiation). OSL is used in at least two entirely different applications: the dating of ancient materials (identical in purpose to the better known technique of radiocarbon dating), and as a method of radiation dosimetry which is the measurement of accumulated radiation dose in the tissues of health care, nuclear, research and other workers. While escaping the trap, and returning to a stable position or another trap, excess energy is emitted with a photon (light). en.wikipedia.org /wiki/Optically_Stimulated_Luminescence   (290 words)

Arcchaeometry Depending on the kind of stimulation one distinguishes ‘thermoluminescence’ and ‘optically stimulated luminescence’. The luminescence dating of sediments makes possible the reconstruction of landscape changes under the influence of prehistoric man. With the introduction of agriculture at the beginning of the Neolithic period the problem of soil erosion became potentially one of the major ecological threats. The luminescence dating techniques cover roughly the past 100.000 years and are widely used in archaeology and Quaternary geology. www.mpi-hd.mpg.de /archaeometry/2002english.htm   (868 words)

IU Northwest: Department of Geosciences Optically stimulated luminescence dating of late Holocene raised strandplain sequences adjacent to Lakes Michigan and Superior, upper peninsula, Michigan, USA. Optically stimulated luminescence dating of relict shorelines in the Great Lakes Recent research focuses on establishing a geochronologic history of lake level during the past 5 ky in Lake Superior by applying newly developed approaches in optically stimulated luminescence to coastal landforms. www.iun.edu /~geos/Argyilan.shtml   (245 words)

Jack An optically stimulated luminescence study of flint related to radiation dosimetry. A laboratory inter-comparison of quartz optically stimulated luminescence (OSL) results. Optical dating results for Gorham's Cave and a laboratory inter-comparison. www.science.mcmaster.ca /geo/research/age/jack02.htm   (834 words)

untitled1.html Recent advances using optically-stimulated luminescence (OSL) dating of quartz and feldspar grains presents a new technique for dating the time of burial of sandstone bodies in late Quaternary (<800 ka) alluvial sediments. However, incomplete bleaching and a weak OSL signal from some samples at two of the three locations suggests further work is required to unambiguously define the spatial variation in aggradation rates across the alluvial fans of the Canterbury Plains. OSL measures the time when mineral grains were last exposed to light (i.e. www.geog.leeds.ac.uk /people/p.ashworth/braided.htm   (384 words)

Behavioural studies of stimulated luminescence from feldspars They have proved particularly popular because of the technical ease with which an optically stimulated luminescence signal can be obtained, and the potential for their use in dating over a wider time range than quartz. Particular attention is paid to the thermal and optical properties of the thermoluminescence (TL) and optically stimulated luminescence (OSL) signals from feldspars since these are of greatest relevance to their use as palaeodosimeters. However, while the use of infrared stimulated lminescence has been a great success, the realisation of the potential for dating over a wide time range has been hampered by a series of behavioural problems, in particular concerned with the stability of the luminescence signal. www.aber.ac.uk /~qecwww/papers/geoff/felds.htm   (214 words)

Luminescence Research Laboratory Barnett, S.M. (accepted) Thermally and optically stimulated luminescence dating of Later Prehistoric pottery. Barnett, S.M. (1996) Luminescence dating of British ceramics from the late Bronze Age and Iron Age. Bailiff, I.K. and Barnett, S.M. (1994) Characteristics of infrared stimulated luminescence from a feldspar at low temperature. www.dur.ac.uk /lumin.dating/publicat.htm   (331 words)

Optically stimulated luminescence dating - Wikipedia, the free encyclopedia Stimulating samples using infrared light causes luminescence, the intensity of which varies depending on the amount of radiation absorbed. It is used by archaeologists as an alternative to radiocarbon dating. Exposure to sunlight resets the luminescent signature and so the time period since the soil was buried by later sediments can be calculated. en.wikipedia.org /wiki/Optically_stimulated_luminescence_dating   (221 words)

Luminescence Dating In 1985, they also developed optically stimulated luminescence dating techniques, which use laser light, to date sediments. The Dalhousie Thermally and Optically Stimulated Luminescence and ESR Laboratory When a laser light source is used to stimulate the release of electrons, the process is called optically stimulated luminescence. id-archserve.ucsb.edu /Anth3/Courseware/Chronology/12_Luminescence.html   (621 words)

Luminescence Dating Optically stimulated Luminescence (OSL) where the material is stimulated with light source. Luminescence dating of sediment relies upon the fact that the geological luminescence signal of the sediment is reduced to a near-zero residual due to exposure to daylight during weathering and transport (see Aitken, 1985, 1998). Luminescence is a property by virtue of which any material emits light in response to some external stimulation and depending upon the stimulation this method is broadly has two derivatives: 1. www.uga.edu /osl/technique.html   (845 words)

Dating Exhibit The OSL (Optically Stimulated Luminescence) technique is similar to thermal dating. Optical dating is suitable for a variety of unheated sediments that are no older than 500,000 years. Since the OSL dating technique is sensitive to light the collection of the sample must be done carefully. www.mnsu.edu /emuseum/archaeology/dating/osl.html   (192 words)

Luminescence & Radiometric Dating Dig up the crystal, measure its luminescence (either optically or thermally stimulated), and you know the total dose. OSL and TL dating techniques don't get as much press in the creation/evoluton game, because they cannot be used to measure the billions of years time period characterized by the age of the Earth. Luminescence is a phenomenon exhibited by many crystals, such as diamond, quartz, feldspars and calcite. www.tim-thompson.com /luminescence.html   (1399 words)

OPTICALLY STIMULATED LUMINESCENCE DATING USING SINGLE MINERAL GRAINS: POTENTIAL AND CHALLENGES Luminescence measurements of geological sediments allow the date of the last exposure of mineral grains to be calculated, and has been applied in the age range from a few decades to over 100 ka. Conventional luminescence measurements involve analysis of sub-samples consisting of many hundreds or thousands of mineral grains and assumes that all of the grains have been exposed to sufficient daylight at the time of deposition to reset the luminescence signal to a low level. Recent technological developments have made it easier to measure the luminescence signal from individual sand-sized (100-300 µm diameter) grains of quartz. gsa.confex.com /gsa/inqu/finalprogram/abstract_55765.htm   (472 words)

Radiation Measurements  Volume 33 The supralinear behaviour of the optically stimulated luminescence (OSL) signal is examined in an annealed quartz sample. Such investigations are important in luminescence dating and retrospective dosimetry, especially when the supralinearity intercept comprises a significant component of the paleodose in the sample. The sensitivity-uncorrected OSL growth curve of the annealed quartz sample 3-1/1 is observed to be supralinear in the dose range 0–5 Gy; it is then linear until about 20 Gy; and becomes sublinear beyond 20 Gy. www.prl.ernet.in /~library/banerjee_33_47_01.htm   (235 words)

Optically Stimulated Luminescence (OSL) Dating Optically Stimulated Luminescence (OSL) Dating is a Quaternary geologic age-dating technique used to determine the depositional age of sediments based on solid state properties of mineral grains rather than isotopic decay of constituent elements. OSL dating provides absolute (numeric) ages as opposed to relative chronologies and the ages are determined directly from the sediment grains themselves. Because OSL is not an isotopic technique, confounding issues such as variability in cosmogenic isotope production rates and incomplete geochemical system closure are not germane. ees5-www.lanl.gov /ees10/osl/BriefOSL.shtml   (410 words)

Luminescence Dating Optically Stimulated Luminescence (OSL) dating is a relatively new alternative approach to chronological problems. Luminescence expertise from both the Oxford and Sussex luminescence laboratories have been drawn on in the setting up and running of the SCIDR luminescence dating facility. The amount of luminescence emitted is proportional to accumulated dose and with the annual dose an age can be determined. www.shef.ac.uk /uni/academic/I-M/idry/lumindat.html   (302 words)

Luminescence dating When a mineral is stimulated by heat or light, Thermoluminescence (TL) or Optically Stimulated Luminescence (OSL) is emitted, respectively, and is a measure of the stored energy and therefore the total radiation exposure. The Luminescence dating facility was established in 1996 and is engaged in a range of Research, Service and Knowledge Transfer activities. The time dependent signal used in Luminescence dating is the accumulation and storage of energy imparted within minerals by natural ionising radiation existent within the environment. www.glos.ac.uk /schools/environment/facilities/envirolabs/geochronlabs/luminescence/index.cfm   (530 words)

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