Feldspars form a solid-solution series whereby the K-content may range from 0 to 14%. LA-ICP-MS measurements for density-separated single-grains of feldspar yielded realistic concentrations of K within the range of those naturally occurring, and also highlighted the difficulty in isolating the pure end members during density-separation. No direct relationship was found between the thermal stability of the infrared-stimulated luminescence (IRSL) signal and measured K-content of individual grains. However, the brightest IRSL and post-IR IRSL signals originated from grains with similar to 12% K-content. All grains giving a measurable signal had K-content between 6 and 13%, therefore it is suggested that an internal K-content of 10 +/- 2% can be assumed for routine single-grain dating of density-separated K-feldspars. (C) 2012 Elsevier Ltd. All rights reserved.
|Nifer y tudalennau||7|
|Dyddiad ar-lein cynnar||02 Chwef 2012|
|Dynodwyr Gwrthrych Digidol (DOIs)|
|Statws||Cyhoeddwyd - Medi 2012|
|Digwyddiad||Proceedings of the 13th International Conference on Luminescence and Electron Spin - Toruń, Gwlad Pŵyl|
Hyd: 10 Gorff 2011 → 14 Gorff 2011