<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>It is well known that some minerals give underestimated luminescence ages due to anomalous fading. The anomalous fading follows a logarithmic decay law characterized by its slope, the socalled fading rate or g-value. Using the fading rate, Huntley and Lamothe (2001) suggested some correction for the fading underestimation of young samples (&lt;40-50 ka). For polymineral fine grains, we observe a fading rate of 0-4%/decade for TL and BL-OSL and 4-6%/decade for IR-OSL. Extending the laboratory observation to archaeological age, the underestimation on the age for 10 ka is estimated to a mean of 5% for TL, 10% for BL-OSL and 45% for IR-OSL. Due to the non-linearity of the Huntley and Lamothe's fading correction, the contribution of the fading to the total uncertainty is estimated by a Monte-Carlo simulation. The inference on dating shows that the uncertainty on the anomalous fading can be a significant term of the combined uncertainty on the age, even for low fading rates.</p></abstract>

It is well known that some minerals give underestimated luminescence ages due to anomalous fading. The anomalous fading follows a logarithmic decay law characterized by its slope, the socalled fading rate or g-value. Using the fading rate, Huntley and Lamothe (2001) suggested some correction for the fading underestimation of young samples (<40-50 ka). For polymineral fine grains, we observe a fading rate of 0-4%/decade for TL and BL-OSL and 4-6%/decade for IR-OSL. Extending the laboratory observation to archaeological age, the underestimation on the age for 10 ka is estimated to a mean of 5% for TL, 10% for BL-OSL and 45% for IR-OSL. Due to the non-linearity of the Huntley and Lamothe's fading correction, the contribution of the fading to the total uncertainty is estimated by a Monte-Carlo simulation. The inference on dating shows that the uncertainty on the anomalous fading can be a significant term of the combined uncertainty on the age, even for low fading rates.

Uncertainties on the Luminescence Ages and Anomalous Fading

Centre de Recherche et de Restauration des Musées de France, Palais du Louvre, Porte des lions 14 quai F. Mitterrand, 75001 Paris

Geochronometria

{"article-title":"Uncertainties on the Luminescence Ages and Anomalous Fading"}

It is well known that some minerals give underestimated luminescence ages due to anomalous fading. The anomalous fading follows a logarithmic decay law...

Uncertainties on the Luminescence Ages and Anomalous Fading

Publié en ligne: 06 avr. 2009

Pages: 47 - 50

DOI: https://doi.org/10.2478/v10003-008-0027-4

Mots clés
Luminescence dating, anomalous fading, uncertainties

This content is open access.

Uncertainties on the Luminescence Ages and Anomalous Fading

Publié en ligne: 06 avr. 2009

Pages: 47 - 50

DOI: https://doi.org/10.2478/v10003-008-0027-4

Mots clésLuminescence dating, anomalous fading, uncertainties

This content is open access.

Mots clés
Luminescence dating, anomalous fading, uncertainties