Applications of Radiocarbon Dating Method

Hajdas, Irka

doi:10.1017/s0033822200033713

Cited by 28 publications

(11 citation statements)

References 52 publications

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“…Nevertheless, there is usually a lack of organic matter within glaciofluvial sediments and the upper age limit of around 50 ka further limits the application of radiocarbon dating (Hajdas, 2009). Luminescence dating has proven to be a robust method for dating a variety of sediments from different environmental settings .…”

Section: Introductionmentioning

confidence: 99%

Performance of different luminescence approaches for the dating of known-age glaciofluvial deposits from northern Switzerland

2013

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Luminescence properties of two samples taken from sand lenses in proglacial outwash deposits of a piedmont glacier that reached the Swiss midlands during the Last Glacial Maximum are investigated in detail. Deconvolution of CW-OSL decay curves shows that the fast component dominates the OSL signal of quartz. The chemistry of single feldspar grains, in particular the K content in different grains, is determined using wavelength dispersive spectrometry (electron microprobe), revealing an average 12.9 wt.% K of the grains contributing to the IRSL signal. D e distributions are investigated in order to gain insights into partial bleaching, and agreement is found for quartz OSL and feldspar IR 50 and pIRIR 225 ages for small aliquots and single grains when applying the Minimum Age Model. These ages are also consistent with independent age control. For one sample, ages determined using the Central Age Model result in highly overestimated ages for both feldspar and quartz.

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Section: Introductionmentioning

confidence: 99%

Performance of different luminescence approaches for the dating of known-age glaciofluvial deposits from northern Switzerland

2013

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“…Sediment slices were wet sieved and organic remains were isolated under the binocular microscope. Samples were cleaned using the standard ABA protocol (Hajdas, 2009 and references therein). Radiocarbon ages were modelled with the CLAM software (Blaauw, 2010) and the calibration curve IntCal13 (Reimer et al, 2013).…”

Section: Sediment Archives and Chronologymentioning

confidence: 99%

Constant denudation rates in a high alpine catchment for the last 6 kyrs

Grischott

Kober

Lupker

et al. 2016

Earth Surf Processes Landf

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Terrestrial cosmogenic nuclides (TCN) have widely been used as proxies in determining denudation rates in catchments. Most studies were limited to samples from modern active streams, thus little is known about the magnitude and causes of TCN variability on millennial time scales. In this work we present a 6 kyrs long, high resolution record of 10Be concentrations (n = 18), which were measured in sediment cores from an alluvial fan delta at the outlet of the Fedoz Valley in the Swiss Alps. This record is paired with a 3‐year time series (n = 4) of 10Be measured in sediment from the active stream currently feeding this fan delta. The temporal trend in the 10Be concentrations after correction for postdepositional production of 10Be was found to be overall constant and in good agreement with the modern river 10Be concentration. The calculated mean catchment‐wide denudation rate amounts to 0.73 ± 0.18 mm yr−1. This fairly constant level of 10Be concentrations can be caused by a constant denudation rate over time within the catchment or alternatively by a buffered signal. In this contribution we suggest that the large alluvial floodplain in the Fedoz Valley may act as an efficient buffer on Holocene time scales in which sediments with different 10Be signatures are mixed. Therefore, presumable variations in the 10Be signals derived from changes in denudation under a fluctuating Holocene climate are only poorly transferred to the catchment outlet and not recorded in the 10Be record. However, despite the absence of high frequency signals, we propose that the buffered and averaged 10Be signal could be meaningfully and faithfully interpreted in terms of long‐term catchment‐averaged denudation rate. Our study suggests that alluvial buffers play an important role in regulating the 10Be signal exported by some alpine settings that needs to be taken into account and further investigated. Copyright © 2016 John Wiley & Sons, Ltd.

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“…Si bien el uso del 14 C como herramienta para fechar muestras de interés arqueológico fue el motor inicial para el desarrollo de la técnica, su aplicación en Ciencias de la Tierra es muy amplia. Específicamente, en estudios paleoambientales es crucial poder referir a la escala temporal cambios ambientales estudiados en diferentes registros y distribuidos en diferentes latitudes, y es precisamente de radiocarbono la cronología con la que se han producido la mayoría de las reconstrucciones climáticas para el Holoceno y el Pleistoceno tardío (Bard, 1998;Lowe y Walker, 2000;Hajdas, 2009 C se forma principalmente por la reacción entre los neutrones resultantes de la radiación cósmica y los átomos de nitrógeno del aire que se lleva a cabo en la atmósfera superior, de acuerdo a p C N n 14 6 14 7 + → + donde n y p representan neutrones y protones, respectivamente. La tasa global de formación de radiocarbono no se conoce con exactitud, sin embargo se sabe que varía como consecuencia tanto de cambios en la incidencia de los rayos cósmicos como en el campo magnético terrestre y la actividad solar (Bronk Ramsey, 2008).…”

Section: Datación Por Radiocarbonounclassified