IRSL dating of Middle Pleistocene interglacial sediments from southern Quebec (Canada) using multiple and single grain aliquots

Authors
Balescu, S Lamothe, M Auclair, M Shilts, WW
Citation
S. Balescu et al., IRSL dating of Middle Pleistocene interglacial sediments from southern Quebec (Canada) using multiple and single grain aliquots, QUAT SCI R, 20(5-9), 2001, pp. 821-824
Citations number
13
Categorie Soggetti
Earth Sciences
Journal title
QUATERNARY SCIENCE REVIEWS
ISSN journal
02773791 → ACNP
Volume
20
Issue
5-9
Year of publication
2001
Pages
821 - 824
Database
ISI
SICI code
0277-3791(200103)20:5-9<821:IDOMPI>2.0.ZU;2-B
Abstract
The IRSL dating of Middle Pleistocene interglacial fluvial sediments from S outhern Quebec, correlated with oxygen isotopic stage 7, yields optical dat es much younger than the expected geological age. Single grain IRSL measure ments on alkali-feldspars, following the fadia protocol developed by Lamoth e and Auclair (Earth and Planetary Science Letters, 171, 319-323, 1999), su ggest that anomalous fading is the most probable cause for this severe age underestimation. The IRSL dates corrected for this anomalous fading are in better agreement with the expected ages. (C) 2000 Elsevier Science Ltd. Ail rights reserved.