Progress towards a polymineral single-aliquot OSL dating procedure

Radiat Prot Dosimetry. 2006;119(1-4):450-3. doi: 10.1093/rpd/nci504. Epub 2006 Mar 24.

Abstract

Published single-aliquot regenerative-dose (SAR) procedures for quartz use a 'cutheat' different from the pre-heat. In contrast, previous work has shown that the SAR procedure can be used to correct for sensitivity changes exhibited by feldspars if the cutheat is equal to the pre-heat. In this paper, a procedure that corrects for sensitivity changes in both quartz and feldspar is tested. The results indicate that for sedimentary quartz the cutheat can be equal to the pre-heat. Thus, it may be possible to develop one procedure to measure equivalent doses in a polymineral sample. We also tested several different optical stimulation methods. Using the infrared (IR)-stimulated signal from a post-IR blue-stimulated optically stimulated luminescence sequence extends the potential age range when using feldpathic materials. In addition, since the post-IR blue-stimulated signal from feldspar is much smaller than the blue-stimulated signal from quartz, the possibility exists of extracting a 'quartz signal' from a mixed mineral sample.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Algorithms*
  • Aluminum Silicates / analysis*
  • Aluminum Silicates / radiation effects*
  • Geology / methods*
  • Half-Life
  • Hot Temperature
  • Light
  • Materials Testing / methods*
  • Minerals / analysis*
  • Minerals / radiation effects*
  • Potassium Compounds / analysis*
  • Potassium Compounds / radiation effects*
  • Thermoluminescent Dosimetry / methods*

Substances

  • Aluminum Silicates
  • Minerals
  • Potassium Compounds
  • feldspar