Abstract
Samples of suspended sediment were obtained from the Dora di Ferret, a glacifluvial stream in the Italian Alps, over a period of 24 h. IRSL analysis of the sediment indicates that the residual (I-NAT) signal is almost completely zeroed within 3 km of fluvial transport during daylight hours. In contrast, samples collected at night possess environmental doses (D-E) in excess of 100 Gy, probably the luminescence signal of the parent till from which the fine-grained suspended load has been derived. Quaternary deposits of glacifluvial sediment will contain a mixture of daylight and night transported mineral grains, the resulting complex behaviour accounting for difficulties in luminescence dating such materials. Adaptations of single-aliquot protocols and single-grain protocols appear to offer the best chance of dating glacifluvial deposits accurately. (C) 1999 Elsevier Science Ltd. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 207-215 |
| Number of pages | 9 |
| Journal | Quaternary Science Reviews |
| Volume | 18 |
| Publication status | Published - 1999 |
Keywords
- QUATERNARY SEDIMENTS
- BLEACHED SEDIMENTS
- SINGLE ALIQUOTS
- LUMINESCENCE
- THERMOLUMINESCENCE
- SPITSBERGEN
- CHRONOLOGY
- FELDSPARS
- SCOTLAND