Abstract
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 ∼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.
| Original language | English |
|---|---|
| Pages (from-to) | 790-796 |
| Number of pages | 7 |
| Journal | Radiation Measurements |
| Volume | 47 |
| Issue number | 9 |
| Early online date | 02 Feb 2012 |
| DOIs | |
| Publication status | Published - Sept 2012 |
| Event | Proceedings of the 13th International Conference on Luminescence and Electron Spin - Toruń, Poland Duration: 10 Jul 2011 → 14 Jul 2011 |
Keywords
- POTASSIUM
- SEDIMENT EXTRACTS
- QUARTZ
- LA-ICP-MS
- Signal intensity
- SPECTRA
- SAMPLES
- Dose-rate
- SIGNALS
- Feldspar
- DOSE-RATE
- Thermal stability
- THERMOLUMINESCENCE
- PROTOCOL
- Luminescence
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