水成相沉积物细颗粒石英光释光综合生长曲线的建立与应用  

STANDARDIZED GROWTH CURVES(SGC)FOR OPTICAL DATING OF FINE-GRAINED QUARTZ FROM WATER-LAIN SEDIMENTS

作　　者：杨传成[1] 陈杰[1] 张克旗[1] 刘进峰[1] 王昌盛[1] 雷生学[1] 

机构地区：[1]中国地震局地质研究所地震动力学国家重点实验室,北京100029

出　　处：《地震地质》2007年第2期402-411,共10页Seismology and Geology

基　　金：国家发展与改革委员会发改投资"城市活断层试验探测"项目(20041138);地震科学联合基金重点课题(201018)共同资助

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12~65Gy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。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 （ （LN/TN） ＊ TD） into the SGC curve. To estimate the reliability of this method in water lain sediments, their SGC Eo values were compared to that of SMAR Eo using their own individual growth curve. It is found that the uncertainty is up to 19% for natural samples with Eo values of 12 -65Gy. For the Eo values greater than 65Gy, their uncertainty is much larger. While for samples with Eo values of less than 12Gy, the maximum uncertainty is up to 25%. Using the information of Eo values estimated by SGC protocol, we can easily and accurately obtain regeneration doses for SMAR protocol and further obtain the Eo value for each sample. This will save much time in dating application.

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 

分 类 号：P597[天文地球—地球化学]