Abstract: Some water-lain sediments samples with different ages were selected from several regions in China,and their Standardized Growth Curves(SGC)were constructed for fine-grained quartz OSL signals that were measured by sensitivity-corrected multiple aliquot regenerative-dose protocol(SMAR).The equivalent dose of each sample can be determined by plotting their standard OSL intensity((L_N/T_N)*T_D)into the SGC curve.To estimate the reliability of this method in water lain sediments,their SGC E_D values were compared to that of SMAR E_D using their own individual growth curve.It is found that the uncertainty is up to 19% for natural samples with E_D values of 12～65Gy.For the E_D values greater than 65Gy,their uncertainty is much larger.While for samples with E_D values of less than 12Gy,the maximum uncertainty is up to 25%.Using the information of E_D values estimated by SGC protocol,we can easily and accurately obtain regeneration doses for SMAR protocol and further obtain the E_D value for each sample.This will save much time in dating application.

Key words: Optically stimulated luminescence(OSL), fine-grained quartz, standardized growth curve, equivalent dose, water-lain sediments

摘要： 选择中国不同地区的冲洪积相等水成相沉积物样品,根据其简单多片再生法(SMAR)测量数据建立了细颗粒石英光释光信号的综合生长曲线(Standardised growth curves,SGC)。对未知年龄的水成相沉积物细颗粒石英样品,通过测量其天然光释光信号和试验剂量响应信号,并利用上述SGC方程可计算出其等效剂量值.将此值与简单多片再生法(SMAR)测量结果相比较,统计得出对于天然等效剂量为12～65 Gy的样品,其误差可达19%;对于天然剂量＞65Gy的样品,其误差更大;对于等效剂量＜12Gy的样品,最大误差也达25%.实验表明,应用这个SGC估计未知年龄样品的等效剂量值范围,再对样品采用简单多片再生法(或单片再生法)进一步测量,可大大节省测量时间。

关键词: OSL测年, 细颗粒石英, 综合生长曲线(SGC), 等效剂量, 水成相沉积物