Infrared Stimulated Luminescence and Thermoluminescence Dating of Loess from Lanzhou, China

摘要

Loess samples from the 22-m thick Shajinping section on the second-lowest terrace of the Yellow River in Lanzhou, Gansu Province, China, were dated by infrared stimulated luminescence (IRSL) and by thermoluminescence (TL). Isothermal preheating tests for IRSL dating were made at two different tempera- tures, 120 and 160℃, to determine the preheating condition most appropriate for isolating the stable IRSL signal.