Quartz luminescence dating

OSL ages are calculated as ratio of De and dose rate, i.e.the amount energy emitted by radioactive elements through ionising radiation per year, and reflect the time of sediment deposition, if the OSL signal was completely bleached prior to deposition.

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Hence, it is often necessary to date fluvial deposits and use this information for the reconstruction of past river dynamics.

The most common method in this context is radiocar-bon dating, but it suffers from two major problems.

Indeed, p-IRIR and published radiometric ages for Cyprus are in a good agreement.

Published radiometric ages from the same site put additional significance on evaluating the effectiveness of p-IRIR dating, as independent age control on the latter remains scarce in literature to date.

First, most organic material in fluvial environments is reworked and radiocarbon dates may hence overestimate the true age of fluvial deposition (e.g., Howard ., 2016).

While this problem can be reduced by sampling aquatic plant remains, identification of such material is not always straightforward.Optically Stimulated Luminescence (OSL) dating utilises a light-sensitive latent signal in quartz and feldspar grains induced by ionising radiation, mainly originating from radioactive decay of K, Th and U and their daughter isotopes (cf. During sediment transport the signal is depleted (bleached) by daylight and starts to accumulate after burial, when the grains are sealed from light exposure.Madsen and Murray (2009) and Pietsch (2009) summarise the specific methodological aspects related to the dating of young deposits (defined here as ages is determined by comparing natural OSL with OSL signals induced through laboratory radiation.Ages are in stratigraphic order assigning the formation of the studied deposits to the Last Interglacial stage.The p-IRIR dating was concluded to be a reliable technique for establishing precise and accurate chronologies and a trustworthy alternative to quartz optically stimulated luminescence (OSL) dating when the quartz luminescence characteristics are unsuitable.Second, there are several plateaus in the radiocarbon calibration curve of the last few centuries that will produce very large uncertainties.

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