IRSL Dating and Correction for Holocene Samples with K-Feldspar
In this paper, optical stimulated luminescence(OSL)by quartz and K-feldspar respectively dated four Holocene samples from section QJD-1. It was found that for these samples,their K-feldspar demonstrated ages are about 2%~9% lower than their quartz ages. But the ages obtained by correcting the K-feldspar demonstrated ages by the g value,which is measured in laboratory,are about 16%~40% higher than the quartz ages. The main reason might be that thermal transfer to exist and the signal delay with time too small at laboratory time scale. It is indicated that the g correction dating by K-feldspar is not accurate for Holocene samples,but the impact of anomalous fading on IRSL dating by K-feldspar could be ignorable for Holocene samples. Therefore,the routine IRSL dating by K-feldspar can be used to establish an age framework if there is not available OSL ages from quartz.
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