EXAMINING QUARTZ OSL AGE UNDERESTIMATION FOR LOESS SAMPLES FROM LUOCHUAN IN THE CHINESE LOESS PLATEAU

ISL OpenIR > 青海盐湖研究所知识仓储

	EXAMINING QUARTZ OSL AGE UNDERESTIMATION FOR LOESS SAMPLES FROM LUOCHUAN IN THE CHINESE LOESS PLATEAU
	Lai, Zhongping1 ; Fan, Anchuan 2,3
	2014-03-01
发表期刊	GEOCHRONOMETRIA
卷号	41 期号:1 页码:57-64
关键词	Quartz Osl Age Underestimation Chinese Loess Signal Stability
摘要	When using quartz OSL to date loess samples from the Chinese Loess Plateau, it has been reported that the agreement between OSL ages and the independent ages is limited to the samples younger than similar to 70 ka with a corresponding D-e of similar to 230 Gy, and a sample with an expected age of 780 ka was dated to 107 ka, corresponding to 403 Gy. The growth curves of these samples do not saturate at doses of 700 Gy, and a linear growth part was observed for doses higher than 200 Gy. However, the maximum measured age of similar to 100 ka imply that the D-e determined using this linear part of a growth curve could be problematic, or that the quartz OSL signal is not as stable as previously thought and has a barrier age of similar to 100 ka. In the current study, we examine the reasons for the age underestimation. We examined the shape of growth curves, anomalous fading, thermal stability, etc. The results show that, for the loess samples examined, quartz OSL does not fade anomalously, and the barrier age of similar to 100 ka is due to the fact that the OSL signals are less thermally stable, the lifetime of 0.311 Ma at 20 degrees C obtained is much smaller than those for quartz samples from other regions such as Australia (similar to 100 Ma).
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/5677
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所
作者单位	1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Luminescence Dating Grp, CAS Key Lab Salt Lake Resources & Chem, Xining 810008, Peoples R China 2.Univ Sci & Technol China USTC, Dept Hist Sci & Technol & Archaeometry, Hefei 230026, Peoples R China 3.Univ Sci & Technol China, USTC Archaeometry Lab, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Lai, Zhongping,Fan, Anchuan. EXAMINING QUARTZ OSL AGE UNDERESTIMATION FOR LOESS SAMPLES FROM LUOCHUAN IN THE CHINESE LOESS PLATEAU[J]. GEOCHRONOMETRIA,2014,41(1):57-64.
APA	Lai, Zhongping,&Fan, Anchuan.(2014).EXAMINING QUARTZ OSL AGE UNDERESTIMATION FOR LOESS SAMPLES FROM LUOCHUAN IN THE CHINESE LOESS PLATEAU.GEOCHRONOMETRIA,41(1),57-64.
MLA	Lai, Zhongping,et al."EXAMINING QUARTZ OSL AGE UNDERESTIMATION FOR LOESS SAMPLES FROM LUOCHUAN IN THE CHINESE LOESS PLATEAU".GEOCHRONOMETRIA 41.1(2014):57-64.