Buechi, Marius W.; Lowick, Sally; Anselmetti, Flavio (2017). Luminescence dating of glaciolacustrine silt in overdeepened basin fills beyond the last interglacial. Quaternary geochronology, 37, pp. 55-67. Elsevier 10.1016/j.quageo.2016.09.009
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Abstract {OSL} and {IRSL} dating are applied to samples from a 152 m-long drill core to constrain the timing of three glaciolacustrine depositional periods within the infill of an overdeepened bedrock trough in the Lower Glatt valley, N Switzerland. The characterisation of the dose-response suggests that the polymineral {IRSL50} and pIRIR180/225 signals are close to saturation, while quartz {OSL} ages are within the range of reliable dating. The demarcation of the upper quartz {OSL} dating limit, however, remains challenging. Dose-recovery tests performed with long storage periods were used to investigate the reliability of the high region of the dose-response curve. They suggest an upper limit for reliable dating of ~400 Gy for these samples, which was considerably lower than the commonly used 2D0 criterion. Lifetimes were calculated for the quartz {OSL} and the thermal stability of the signal is not considered as problematic for the determined ages. Allowing for a contribution from inherited dose due to partial bleaching, places the infill of the overdeepened valley within the penultimate glacial cycle (MIS6).
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR) 08 Faculty of Science > Institute of Geological Sciences 08 Faculty of Science > Institute of Geological Sciences > Quaternary Geology |
UniBE Contributor: |
Büchi, Marius, Lowick, Sally, Anselmetti, Flavio |
Subjects: |
500 Science > 550 Earth sciences & geology |
ISSN: |
1871-1014 |
Publisher: |
Elsevier |
Language: |
English |
Submitter: |
Marius Büchi |
Date Deposited: |
15 Nov 2016 16:05 |
Last Modified: |
05 Dec 2022 14:59 |
Publisher DOI: |
10.1016/j.quageo.2016.09.009 |
Uncontrolled Keywords: |
Quartz OSL, Saturation, Dose response, Partial bleaching, Glaciolacustrine deposits, MIS6 |
BORIS DOI: |
10.7892/boris.89490 |
URI: |
https://boris.unibe.ch/id/eprint/89490 |
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