RESEARCH PAPER
The D
e (T, t) plot: A straightforward self-diagnose tool for post-IR IRSL dating procedures
1
Department of Earth Sciences, the University of Hong Kong, Pokfulam Road, Hong Kong, China
Online publication date: 2014-10-01
Publication date: 2014-12-01
Geochronometria 2014;41(4):315-326
KEYWORDS
ABSTRACT
This study presents a new self-diagnose method for the recently developed post-IR infrared stimulated luminescence (pIRIR) dating protocols. This criterion studies the dependence of equivalent dose (D
e) on measurement-temperature (T) and time (t), by applying the D
e (t) analysis to the IRLS and pIRIR signals measured under different temperatures, and combines these D
e (t) plots into one, so-called the D
e (T, t) plot. The pattern of the D
e (T, t) plot is shown to be affected by anomalous fading, partial bleaching and non-bleachable signal. A D
e plateau can be achieved in the D
e (T, t) plot only when the effects of these factors are insignificant. Therefore, this plot can be used as a self-diagnose tool for the validity of pIRIR results. The D
e (T, t) analysis has been applied to four recently developed pIRIR protocols, using aeolian samples with different ages. The results show that this self-diagnose tool can be applied to different pIRIR protocols for validating the pIRIR dating results and evaluating the pIRIR measurement conditions.
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