The chronology of a sediment core from incised valley of the Yangtze River delta: Comparative OSL and AMS 14 C dating

地质学 石英 光学测年 光释光 三角洲 年表 沉积物 矿物学 地球化学 地貌学 古生物学 构造盆地 工程类 航空航天工程
作者
Xiaomei Nian,Weiguo Zhang,Zhanghua Wang,Qianli Sun,Jing Chen,Zhongyuan Chen,Simon M. Hutchinson
出处
期刊:Marine Geology [Elsevier BV]
卷期号:395: 320-330 被引量:48
标识
DOI:10.1016/j.margeo.2017.11.008
摘要

Optically stimulated luminescence (OSL) dating has gained increased use in dating deltatic deposits, however, its application can be hindered by the problem of incomplete bleaching. To address this limitation, we test the single-grain OSL method for the first time in the Yangtze River delta. A total of eight OSL and 14 AMS 14C samples were obtained from a 50.8 m long sediment core from the incised valley of the delta. Quartz extracted from eight OSL samples from the core was first measured with small multi-grain aliquots using medium- (45–63 μm) and coarse-grained (90–125 μm or 150–180 μm) fractions to test the internal consistency of their respective ages. The results showed that four of five medium-grained quartz samples appeared to be well bleached. In contrast, the coarse-grained quartz samples revealed poor bleaching, except for two samples from the delta front facies. Five coarse-grained quartz OSL samples were further analyzed using a single-grain OSL technique. Only 0.5–0.7% of the grains passed the rejection criteria. Single-grain OSL dating is appropriate for age determination of coarse-grained sediments which have been affected by incomplete bleaching. However, it consumes a lot of instrument time. Central and minimum age models (CAM and MAM) were used to calculate the burial age of the samples; MAM ages fit best in the stratigraphic sequence. Small aliquots are recommended as effective in identifying incomplete bleaching for medium- or coarse-grained quartz. A comparison of AMS 14C dates and OSL ages shows that 14C values are 1–3 ka older than OSL ages. According to the OSL ages, core SD experienced rapid accumulation 10–8 ka and in the last 2 ka. The former is linked to rapid sea-level rise in early Holocene, while the latter is primarily due to the migration of depo-center towards the core site, rather than entirely increased sediment delivery caused by human activities.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
wanci应助老实的采蓝采纳,获得10
1秒前
威哥完成签到,获得积分10
2秒前
斯可发布了新的文献求助10
2秒前
桐桐应助lh961129采纳,获得10
3秒前
JUZI发布了新的文献求助10
4秒前
Lendar完成签到 ,获得积分10
4秒前
RuiBigHead发布了新的文献求助10
5秒前
6秒前
跳跃的洋葱完成签到 ,获得积分10
6秒前
6秒前
yangjoy完成签到,获得积分10
7秒前
pinklay完成签到 ,获得积分10
7秒前
7秒前
科研通AI5应助ttt采纳,获得10
8秒前
重要问旋完成签到,获得积分10
8秒前
9秒前
香蕉觅云应助科研通管家采纳,获得10
10秒前
10秒前
酷波er应助科研通管家采纳,获得10
10秒前
华仔应助科研通管家采纳,获得10
10秒前
wanci应助科研通管家采纳,获得30
10秒前
老阎应助科研通管家采纳,获得30
10秒前
姜莹应助科研通管家采纳,获得10
10秒前
隐形曼青应助科研通管家采纳,获得10
10秒前
顾矜应助科研通管家采纳,获得10
10秒前
共享精神应助科研通管家采纳,获得10
10秒前
大模型应助科研通管家采纳,获得10
10秒前
在水一方应助科研通管家采纳,获得10
10秒前
英姑应助科研通管家采纳,获得10
10秒前
CodeCraft应助科研通管家采纳,获得10
10秒前
10秒前
ED应助科研通管家采纳,获得10
11秒前
NexusExplorer应助科研通管家采纳,获得10
11秒前
11秒前
思源应助科研通管家采纳,获得10
11秒前
11秒前
orixero应助科研通管家采纳,获得10
11秒前
斯文败类应助科研通管家采纳,获得10
11秒前
香蕉觅云应助科研通管家采纳,获得10
11秒前
斯可完成签到,获得积分10
11秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
Research on Disturbance Rejection Control Algorithm for Aerial Operation Robots 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4038619
求助须知:如何正确求助?哪些是违规求助? 3576294
关于积分的说明 11375058
捐赠科研通 3306084
什么是DOI,文献DOI怎么找? 1819374
邀请新用户注册赠送积分活动 892698
科研通“疑难数据库(出版商)”最低求助积分说明 815066