Methodological considerations in the optical dating of quartz

Dose rate measurements need to take into account the radioactive equilibrium of the uranium decay and the short range inhomogeneity of the environmental gamma radiation field: gamma spectrometry and on-site TLD measurements are best suited.

Earth and Planetary Sciences » Geology and Geophysics » "Geochronology - Methods and Case Studies", book edited by Nils-Axel Morner, ISBN 978-9-1, Published: July 25, 2014 under CC BY 3.0 license. (a) Irradiation leads to electrons being expelled from their original site and diffuse within the lattice.

Hence it underlines the increasing importance of the method to geomorphological research, especially by contributing to the development of quantitative geomorphology.

L’objectif de cet article est de proposer une présentation d’ensemble des méthodes de datations par luminescence stimulée optiquement (OSL) et de leurs applications dans le champ des recherches en géomorphologie.

We also show that samples from the same depositional settings, and even from the same sites, do not necessarily display similar De distribution characteristics.

The latter complication favours the use of single-grain analysis to unravel the bleaching and burial histories of young (mid- to late Holocene) sediments in these Arctic environments Lee J Arnold and Richard Roberts.

Determination of the time since deposition of a sediment sample from the optically stimulated luminescence of component quartz and feldspar grains using green light has previously employed an argon ion laser as light source.

Test results are presented which show that green light emitting diodes provide a convenient and economical alternative for this dating technique, and their potential for routine use is assessed.

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. Optically stimulated luminescence (OSL) dating of perenially frozen deposits in north-central Siberia: OSL characteristics of quartz grains and methodological considerations regarding their suitability for dating. Optically stimulated luminescence (OSL) dating of coarse-grained quartz is increasingly being used as the main chronological tool in late Quaternary palaeoenvironmental reconstructions of Siberia.The results of this study suggest that the quartz luminescence characteristics of these samples are, in principle, favourable for OSL dating but, in practice, require that a series of validation checks are made of the chosen experimental conditions.Problems associated with the technique of optical dating are discussed, particularly the thermal treatment that is necessary to remove thermally unstable charge following artificial irradiation, and the extrapolation of growth curves to estimate the equivalent dose.The technique used is described and some preliminary dates are presented.

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