Quartz osl dating

If the sample is relatively old then the interpolation of the natural value is at relatively high positions on the OSL axis because it is near a state of saturation as illustrated in Figure 1b.

A small change in the value of the natural value can result in a very significant change in the resulting dose interpolation and for some samples all that can be inferred is that they are in saturation and the resultant age is regarded as a minimum age.

quartz osl dating-7

Quartz osl dating

In this project, we use quartz single-grain optically stimulated luminescence (OSL) methods to determine the burial ages of five debris flow samples from the Zhai Tang region ∼60 km west of Beijing.

OSL characteristics were found to be acceptable despite the low inherent brightness of quartz extracted from these samples.

Water within the soil has an attenuating effect on the ambient radiation.

Consequently, samples analysed without consideration of their water content or using a low estimate of water content will return ages younger than samples corrected for this effect.

Suitable for samples up to about 150Ka containing quartz. Ideal for young sediments with no biogenic material present or where the age of the sediments exceeds the range of 14C dating (c. Requires precise measurement of sample water content and salinity.

The basic cost is £550/sample plus reporting time based on your requirements.

These slowly decay over time and the ionising radiation they produce is absorbed by other constituents of the sediments such as quartz and feldspar.

Stimulating samples using infrared light causes luminescence, the intensity of which varies depending on the amount of radiation absorbed.

A measure is made of a natural signal which is then correlated with the saturating exponential growth curve.

The corresponding Equivalent dose is calculated by reading it down to the x-axis. where there is still scope for much more charge accumulation) the interpolation is simple as illustrated in Figure 1a.

Debris flows in the mountainous regions south west of Beijing, China occur frequently and often result in considerable mass movements with disastrous consequences for human life, infrastructure and agriculture.

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