INFRARED-STIMULATED LUMINESCENCE DATING OF SEDIMENTS

Luminescence stimulated from feldspar using wavelengths in the infrare d region can be applied to the dating of sedimentary grains. Reported stimulation spectra are very similar for a wide range of feldspars, bu t their emission spectra show greater variation. For accurate dating i t is critical that unstable infrared-stimulated luminescence (IRSL) si gnals are removed from the laboratory-irradiated grains. Several appro aches to isolate a thermally stable signal are described.