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    Osl dating of sediments from deserts in northern china role play dating apps

    The Ulan Buh desert–lake evolution was likely due to the climate changes in the monsoon-influenced region during the early–middle Holocene.► Aeolian–lacustrine sequences are distributed evenly in the north Ulan Buh Desert.► DGPS and OSL dating technologies are applied to these sequences.

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    The paleolake shrank and broke apart after 6.5 ka ago.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. Aeolian samples from deserts in northern China were studied using the optically stimulated luminescence (OSL) of quartz and potassium (K) feldspar separates.The results indicated that the duration of paleosol formation in desert areas reflects regional paleoenvironments. 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.Optically stimulated luminescence (OSL) dating results were obtained from post-IR OSL signals of quartz fractions of sand samples at the bottom of sand dunes and hills by using the Double-SAR protocol.The OSL ages reveal that the latest sand accumulation began around 19 ka in the northwestern part and 9 ka in the eastern part of the Hobq Desert.

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