| 腾格里沙漠南缘风积物快组分光释光信号选择研究 |
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| 关键词:Tengger desert fast component OSL signal intervals |
| 基金项目:国家973前期计划项目(编号: 2012CB426501) |
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| Selections of Fast-component OSL Signal Using Sediments from the South Edge of Tengger Desert |
| Selections of different signal intervals affect the precision of equivalent dose calculation. Six dune samples from Gulang at the southern edge of Tengger Desert were dated using optically stimulated luminescence (OSL) by employing various signal intervals, and a total of 193 aliquots were obtained. Fast-component based equivalent dose (De) analysis was performed by decomposing OSL signals to fast, middle, slow plus background signal. The comparison of SAR De values with fast-component based De values shows that De values of these samples are sensitive to selections of OSL signal intervals, that using the ‘early background’ method with channel 1~2(0~0.32 s) as the interval for fast-component signal and channel 3~7(0.32~1.12 s) as the interval for background signal obtains De values that is consistent with fast-component based De values, and that significant differences exist between De values calculated using ‘late background’ method and those calculated using fast-component method, suggesting that ‘late background’ based OSL signal is affected strongly by middle component. |
| PENG Jun,HAN Feng-qing.2013.Selections of Fast-component OSL Signal Using Sediments from the South Edge of Tengger Desert[J].Acta Geoscientica Sinica,34(6):757-762. |
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