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Ş. Vasiliniuc A. Timar-Gabor D.A.G. Vandenberghe C.G. Panaiotu R. CS. Begy C. Cosma 《Geochronometria》2011,38(1):34-41
We report on SAR-OSL dating of closely-spaced samples from the loess-palaeosol sequence near Mostiştea lake (Danube Plain,
SE Romania). We used sand-sized quartz and a SAR protocol that involved a preheat of 10s at 220°C and a test dose cutheat
to 180°C. It is shown that these thermal pretreatments isolate a quartz OSL signal that is dominated by the fast component.
The behaviour of this signal in the SAR protocol is then documented. The ratio of the measured to given dose tends to lie
slightly but systematically above unity (∼5% on average) and the recycling ratio below unity (∼6% on average); for all samples,
the recuperated signal is negligible. Within analytical uncertainty, the nineteen optical ages are internally consistent and
agree with the predictions from a palaeomagnetic age-depth model. Although it may be possible to optimize the SAR measurement
procedure, the optical ages already confirm the chronostratigraphic position of the uppermost welldeveloped palaeosol in that
it formed during MIS 5. The established chronology allows correlating the sequence near Mostiştea lake with that near Mircea
VodĂ that we investigated earlier. 相似文献
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