Fine grain IRSL and GLSL dating of late Quaternary sediments from North China

Citation
H. Zhao et al., Fine grain IRSL and GLSL dating of late Quaternary sediments from North China, CHIN SCI B, 46(4), 2001, pp. 334-337
Citations number
15
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Multidisciplinary
Journal title
CHINESE SCIENCE BULLETIN
ISSN journal
1001-6538 → ACNP
Volume
46
Issue
4
Year of publication
2001
Pages
334 - 337
Database
ISI
SICI code
1001-6538(200102)46:4<334:FGIAGD>2.0.ZU;2-S
Abstract
A possible approach to assess the fine grain OSL dating is discussed throug h comparison of equivalent dose (DE) values and ages obtained by IRSL and G LSL of fine grains for 31 sediment samples from North China, The IRSL and G LSL were measured with the same aliquots for each sample, i.e. shine-down w as by 100 s of IRSL (880 nm) followed by 100 s of GLSL (514 nm) on the same discs. The D-E values and ages found by IRSL are in good agreement with th ose by GLSL within 1-2 sigma for 80% samples, especially for aeolian loess samples. Considering that IRSL from feldspar differs obviously from GLSL do minated from quartz in dose response, thermal stability and optical bleachi ng characteristic, the agreement between the D-E values may be taken as evi dence that the two clocks of IRSL and GLSL had been wed reset during deposi tion. The consistent ages of IRSL and GLSL, in turn, may be referred to an indicator to evaluate the fine grain OSL dating of sediments.