ISL OpenIR  > 青海盐湖研究所知识仓储
Optically stimulated luminescence dating of sandy deposits from Gulang county at the southern margin of the Tengger Desert, China
Peng Jun1; Dong Zhibao1; Han Fengqing2
2016-02-01
发表期刊JOURNAL OF ARID LAND
卷号8期号:1页码:1-12
文章类型Article
摘要Aeolian deposits from the deserts in northern China have been used for palaeoenvironmental research to understand aeolian sedimentology and its dynamic connection to past climate conditions. The Tengger Desert in China is sensitive to the waxing and waning of the monsoonal system. In response to past climate change, the southern margin of the Tengger Desert has evolved significantly since the last glacial period. However, previous attempts to date aeolian deposits in this region were mainly based on radiocarbon dating, which has problems when applied to aeolian deposits. Moreover, sedimentary records are limited. Accordingly, past aeolian activity in this desert remains poorly understood. In the present study, we dated sand samples from Gulang county at the southern margin of the Tengger Desert using optically stimulated luminescence (OSL) to understand the history of aeolian activity in this region. Our samples represented well-sorted aeolian sands and sandy loess. Aeolian sands are evidence of dune field buildup and sparse vegetation cover whereas sandy loess is evidence of improved stabilization of sand dunes resulting from ameliorated vegetation cover. Certain samples showed a decline in the equivalent dose (D-e ) values when successive integration intervals were applied, which resulted from unstable OSL signals from non-fast components in the initial part of the decay curve. In order to obtain reliable D-e estimates, we investigated component-resolved and different background subtraction approaches, and compared the resultant D-e estimates. We adopted the early background subtraction method to derive D-e values. Luminescence chronologies and sedimentary records indicated that sand dunes accumulation occurred before 10 ka, and sandy loess developed between 9.5 and 7.6 ka when sand dunes were stabilized as a result of increased effective moisture levels. The transition between sand dune mobilization and stabilization emphasizes the significance of an effective moisture threshold in controlling aeolian activity. Mobilization of sand dunes at similar to 2.3 ka might be related to an increased aridity during the Late Holocene.
关键词Osl Dating Sandy Deposit Integration Interval Selection Aeolian Activity Tengger Desert
WOS标题词Science & Technology ; Life Sciences & Biomedicine
关键词[WOS]QINGHAI-TIBETAN PLATEAU ; NORTHERN CHINA ; DUNE SANDS ; NORTHEASTERN CHINA ; AEOLIAN DEPOSITS ; FAST COMPONENT ; QUARTZ OSL ; TIME ; EVOLUTION ; SEDIMENTS
收录类别SCI
语种英语
WOS研究方向Environmental Sciences & Ecology
WOS类目Environmental Sciences
WOS记录号WOS:000365032100001
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.isl.ac.cn/handle/363002/6169
专题青海盐湖研究所知识仓储
盐湖地质与环境实验室
作者单位1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China
2.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China
推荐引用方式
GB/T 7714
Peng Jun,Dong Zhibao,Han Fengqing. Optically stimulated luminescence dating of sandy deposits from Gulang county at the southern margin of the Tengger Desert, China[J]. JOURNAL OF ARID LAND,2016,8(1):1-12.
APA Peng Jun,Dong Zhibao,&Han Fengqing.(2016).Optically stimulated luminescence dating of sandy deposits from Gulang county at the southern margin of the Tengger Desert, China.JOURNAL OF ARID LAND,8(1),1-12.
MLA Peng Jun,et al."Optically stimulated luminescence dating of sandy deposits from Gulang county at the southern margin of the Tengger Desert, China".JOURNAL OF ARID LAND 8.1(2016):1-12.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Peng Jun]的文章
[Dong Zhibao]的文章
[Han Fengqing]的文章
百度学术
百度学术中相似的文章
[Peng Jun]的文章
[Dong Zhibao]的文章
[Han Fengqing]的文章
必应学术
必应学术中相似的文章
[Peng Jun]的文章
[Dong Zhibao]的文章
[Han Fengqing]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。