Citation: | ZHANG Ke-qi. A PRELIMINARY DISCUSSION ON FEASIBILITY USING THERMALLY TRANSFERRED OPTICALLY STIMULATED LUMINESCENCE (TT-OSL) METHOD TO DATE THE FINE-GRAIN QUARTZ EXTRACTED FROM GANZI LOESS[J]. Journal of Geomechanics, 2013, 19(3): 287-294. |
This paper attempts to date the loess from Ganzi area, Sichuan province, using a new method-TT-OSL protocol for OSL dating. A preliminary experimental study was conducted loess from the Ganzi-A section. Testing result showed that the naturally recuperated OSL signal intensity increases with depth of stratum, being obvious accumulation. A 'replacement plot' analysis was applied to test the reliability of the TT-OSL protocol and showed a nice result. The De values of 3 samples were measured by SMAR and TT-OSL protocols, respectively, and ages were calculated. The comparison between De-TTOSL and De-SMAR show the former was greater than that of the latter, and comparison between the ages is as well. However the ages of TT-OSL method is less than the expected value from magnetostratigraphy. Based on the results, the TT-OSL method was applied to fine-grained quartz extracted from the Ganzi loess. But the reliability of results from TT-OSL dating needed to be tested and verified by more independent ages.
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Natural ReOSL signal intensity of the samples with different depths at the first second
TT-OSL regenerated dose growth curves of the three samples
Aschematic representation of the procedure used for the 'replacement plot' analysis
Results of the 'replacement plot' analysis