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OSL dating of sediments from deserts in northern China |
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| Authors: | Sheng-Hua Li Yong-Ye Chen Bo Li Jimin Sun Li-Rong Yang |
| Institution: | aDepartment of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China bInstitute of Geology and Geophysics, Chinese Academy of Sciences, P.O. Box 9825, Beijing 100029, China |
| Abstract: | Aeolian samples from deserts in northern China were studied using the optically stimulated luminescence (OSL) of quartz and potassium (K) feldspar separates. K-feldspar has shown advantages over quartz for dating samples younger than 100 years, due to its more homogeneous equivalent dose (De) values, higher internal dose rate and higher luminescence sensitivity to dose. Without additional measurements, the luminescence characteristics of quartz obtained in De determination procedures can be used to reveal the source material and/or quartz thermal history for the deserts in northern China. The results indicated that the duration of paleosol formation in desert areas reflects regional paleoenvironments. |
| Keywords: | Optical dating Chinese deserts Quartz and potassium feldspar Age limits |
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