Fine grain IRSL and GLSL dating of late Quaternary sediments from North China
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A possible approach to assess the fine grain OSL dating is discussed through comparison of equivalent dose (D e) values and ages obtained by IRSL and GLSL of fine grains for 31 sediment samples from North China. The IRSL and GLSL were measured with the same aliquots for each sample, i.e. shine-down was by 100 s of IRSL (880 nm) followed by 100 s of GLSL (514 nm) on the same discs. TheD e values and ages found by IRSL are in good agreement with those by GLSL within 1–2σ for 80% samples, especially for aeolian loess samples. Considering that IRSL from feldspar differs obviously from GLSL dominated from quartz in dose response, thermal stability and optical bleaching characteristic, the agreement between the DE values may be taken as evidence that the two clocks of IRSL and GLSL had been well reset during deposition. The consistent ages of IRSL and GLSL, in turn, may be referred to an indicator to evaluate the fine grain OSL dating of sediments.
Keywordscomparison of IRSL and GLSL dating fine grain Quaternary sediments North China
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- 3.Aitken, M. J., An Introduction to Optical Dating, Oxford: Oxford University Press, 1988, 108–139.Google Scholar
- 8.Chen Jie, Lu Yanchou, Yin Gongming et al., Optically stimulated luminescence dating of loess and paleosoil from the Baxie profile, China, Acta Geoscientia Sinica (in Chinese with English abstract), 1997, 18: 239.Google Scholar
- 11.Prescott, J. R., Huntley, D. J., Hutton, J. T., Estimation of equivalent dose in luminescence dating —the Australian slide method, Ancient TL, 1993, 11: 1.Google Scholar
- 14.Duller, G. A. T., Botter-Jensen, L., Luminescence from potassium feldspar stimulated by infrared and green light, Radiation Protection Dosimetry, 1993, 47: 683.Google Scholar