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Nevertheless, luminescence dating of glacial sediments has proven to be challenging: first, glacial sediments were often affected by incomplete bleaching and secondly, quartz grains within the sediments sampled were often characterized by complex luminescence behaviour; characterized by dim signal and low reproducibility.
Specific statistical approaches have been used to over come the former to enable the estimated ages to be based on grain populations most likely to have been well bleached.
These derived on reproducible dose distributions from which accurate ages could be estimated.
Luminescence dating provides an estimate of the time that has elapsed since a sediment was last exposed to daylight.
Dose recovery tests have been carried out under different conditions to study the effect of: preheat temperature, thermal quenching, contribution of slow components, hot bleach after a measuring cycles and IR stimulation.
This means less sampling in the field, much less material to pack up and ship them home for full analsysis.